Use of a balloon catheter for dilation of an occluded artery. It is used in treatment of arterial occlusive diseases, including renal artery stenosis and arterial occlusions in the leg. For the specific technique of BALLOON DILATION in coronary arteries, ANGIOPLASTY, BALLOON, CORONARY is available.
Dilation of an occluded coronary artery (or arteries) by means of a balloon catheter to restore myocardial blood supply.
Use or insertion of a tubular device into a duct, blood vessel, hollow organ, or body cavity for injecting or withdrawing fluids for diagnostic or therapeutic purposes. It differs from INTUBATION in that the tube here is used to restore or maintain patency in obstructions.
An optical source that emits photons in a coherent beam. Light Amplification by Stimulated Emission of Radiation (LASER) is brought about using devices that transform light of varying frequencies into a single intense, nearly nondivergent beam of monochromatic radiation. Lasers operate in the infrared, visible, ultraviolet, or X-ray regions of the spectrum.
Reconstruction or repair of a blood vessel, which includes the widening of a pathological narrowing of an artery or vein by the removal of atheromatous plaque material and/or the endothelial lining as well, or by dilatation (BALLOON ANGIOPLASTY) to compress an ATHEROMA. Except for ENDARTERECTOMY, usually these procedures are performed via catheterization as minimally invasive ENDOVASCULAR PROCEDURES.
The veins and arteries of the HEART.
Methods of creating machines and devices.
Any of various animals that constitute the family Suidae and comprise stout-bodied, short-legged omnivorous mammals with thick skin, usually covered with coarse bristles, a rather long mobile snout, and small tail. Included are the genera Babyrousa, Phacochoerus (wart hogs), and Sus, the latter containing the domestic pig (see SUS SCROFA).
A technique utilizing a laser coupled to a catheter which is used in the dilatation of occluded blood vessels. This includes laser thermal angioplasty where the laser energy heats up a metal tip, and direct laser angioplasty where the laser energy directly ablates the occlusion. One form of the latter approach uses an EXCIMER LASER which creates microscopically precise cuts without thermal injury. When laser angioplasty is performed in combination with balloon angioplasty it is called laser-assisted balloon angioplasty (ANGIOPLASTY, BALLOON, LASER-ASSISTED).
Devices that provide support for tubular structures that are being anastomosed or for body cavities during skin grafting.
Use of a balloon CATHETER to block the flow of blood through an artery or vein.
The return of a sign, symptom, or disease after a remission.
The condition of an anatomical structure's being constricted beyond normal dimensions.
Counterpulsation in which a pumping unit synchronized with the patient's electrocardiogram rapidly fills a balloon in the aorta with helium or carbon dioxide in early diastole and evacuates the balloon at the onset of systole. As the balloon inflates, it raises aortic diastolic pressure, and as it deflates, it lowers aortic systolic pressure. The result is a decrease in left ventricular work and increased myocardial and peripheral perfusion.
Evaluation undertaken to assess the results or consequences of management and procedures used in combating disease in order to determine the efficacy, effectiveness, safety, and practicability of these interventions in individual cases or series.
Radiography of the vascular system of the heart muscle after injection of a contrast medium.
An imbalance between myocardial functional requirements and the capacity of the CORONARY VESSELS to supply sufficient blood flow. It is a form of MYOCARDIAL ISCHEMIA (insufficient blood supply to the heart muscle) caused by a decreased capacity of the coronary vessels.
An inflatable device implanted in the stomach as an adjunct to therapy of morbid obesity. Specific types include the silicone Garren-Edwards Gastric Bubble (GEGB), approved by the FDA in 1985, and the Ballobes Balloon.
Studies in which individuals or populations are followed to assess the outcome of exposures, procedures, or effects of a characteristic, e.g., occurrence of disease.
Lasers which use a solid, as opposed to a liquid or gas, as the lasing medium. Common materials used are crystals, such as YAG (YTTRIUM aluminum garnet); alexandrite; and CORUNDUM, doped with a rare earth element such as a NEODYMIUM; ERBIUM; or HOLMIUM. The output is sometimes additionally modified by addition of non-linear optical materials such as potassium titanyl phosphate crystal, which for example is used with neodymium YAG lasers to convert the output light to the visible range.
Either of two large arteries originating from the abdominal aorta; they supply blood to the pelvis, abdominal wall and legs.
The use of green light-producing LASERS to stop bleeding. The green light is selectively absorbed by HEMOGLOBIN, thus triggering BLOOD COAGULATION.
Percutaneous transluminal procedure for removing atheromatous plaque from the coronary arteries. Both directional (for removing focal atheromas) and rotational (for removing concentric atheromatous plaque) atherectomy devices have been used.
Pathological processes which result in the partial or complete obstruction of ARTERIES. They are characterized by greatly reduced or absence of blood flow through these vessels. They are also known as arterial insufficiency.
NECROSIS of the MYOCARDIUM caused by an obstruction of the blood supply to the heart (CORONARY CIRCULATION).
The main artery of the thigh, a continuation of the external iliac artery.
Elements of limited time intervals, contributing to particular results or situations.
The degree to which BLOOD VESSELS are not blocked or obstructed.
Treatment using irradiation with LASER light of low power intensity so that the effects are not due to heat, as they are in LASER THERAPY.
The innermost layer of an artery or vein, made up of one layer of endothelial cells and supported by an internal elastic lamina.
Obstruction of flow in biological or prosthetic vascular grafts.
Radiography of blood vessels after injection of a contrast medium.
A birth defect characterized by the narrowing of the AORTA that can be of varying degree and at any point from the transverse arch to the iliac bifurcation. Aortic coarctation causes arterial HYPERTENSION before the point of narrowing and arterial HYPOTENSION beyond the narrowed portion.
Damages to the CAROTID ARTERIES caused either by blunt force or penetrating trauma, such as CRANIOCEREBRAL TRAUMA; THORACIC INJURIES; and NECK INJURIES. Damaged carotid arteries can lead to CAROTID ARTERY THROMBOSIS; CAROTID-CAVERNOUS SINUS FISTULA; pseudoaneurysm formation; and INTERNAL CAROTID ARTERY DISSECTION. (From Am J Forensic Med Pathol 1997, 18:251; J Trauma 1994, 37:473)
The continuation of the femoral artery coursing through the popliteal fossa; it divides into the anterior and posterior tibial arteries.
Widening of a stenosed HEART VALVE by the insertion of a balloon CATHETER into the valve and inflation of the balloon.
Surgical therapy of ischemic coronary artery disease achieved by grafting a section of saphenous vein, internal mammary artery, or other substitute between the aorta and the obstructed coronary artery distal to the obstructive lesion.
Observation of a population for a sufficient number of persons over a sufficient number of years to generate incidence or mortality rates subsequent to the selection of the study group.
Techniques using laser energy in combination with a balloon catheter to perform angioplasty. These procedures can take several forms including: 1, laser fiber delivering the energy while the inflated balloon centers the fiber and occludes the blood flow; 2, balloon angioplasty immediately following laser angioplasty; or 3, laser energy transmitted through angioplasty balloons that contain an internal fiber.
The symptom of paroxysmal pain consequent to MYOCARDIAL ISCHEMIA usually of distinctive character, location and radiation. It is thought to be provoked by a transient stressful situation during which the oxygen requirements of the MYOCARDIUM exceed that supplied by the CORONARY CIRCULATION.
Gas lasers with excited dimers (i.e., excimers) as the active medium. The most commonly used are rare gas monohalides (e.g., argon fluoride, xenon chloride). Their principal emission wavelengths are in the ultraviolet range and depend on the monohalide used (e.g., 193 nm for ArF, 308 nm for Xe Cl). These lasers are operated in pulsed and Q-switched modes and used in photoablative decomposition involving actual removal of tissue. (UMDNS, 2005)
Recurrent narrowing or constriction of a coronary artery following surgical procedures performed to alleviate a prior obstruction.
The therapy of the same disease in a patient, with the same agent or procedure repeated after initial treatment, or with an additional or alternate measure or follow-up. It does not include therapy which requires more than one administration of a therapeutic agent or regimen. Retreatment is often used with reference to a different modality when the original one was inadequate, harmful, or unsuccessful.
Studies used to test etiologic hypotheses in which inferences about an exposure to putative causal factors are derived from data relating to characteristics of persons under study or to events or experiences in their past. The essential feature is that some of the persons under study have the disease or outcome of interest and their characteristics are compared with those of unaffected persons.
An increase in the number of cells in a tissue or organ without tumor formation. It differs from HYPERTROPHY, which is an increase in bulk without an increase in the number of cells.
Use of infusions of FIBRINOLYTIC AGENTS to destroy or dissolve thrombi in blood vessels or bypass grafts.
High energy POSITRONS or ELECTRONS ejected from a disintegrating atomic nucleus.
Endovascular procedure in which atheromatous plaque is excised by a cutting or rotating catheter. It differs from balloon and laser angioplasty procedures which enlarge vessels by dilation but frequently do not remove much plaque. If the plaque is removed by surgical excision under general anesthesia rather than by an endovascular procedure through a catheter, it is called ENDARTERECTOMY.
The pathologic narrowing of the orifice of the PULMONARY VALVE. This lesion restricts blood outflow from the RIGHT VENTRICLE to the PULMONARY ARTERY. When the trileaflet valve is fused into an imperforate membrane, the blockage is complete.
A hypoperfusion of the BLOOD through an organ or tissue caused by a PATHOLOGIC CONSTRICTION or obstruction of its BLOOD VESSELS, or an absence of BLOOD CIRCULATION.
The use of ultrasound to guide minimally invasive surgical procedures such as needle ASPIRATION BIOPSY; DRAINAGE; etc. Its widest application is intravascular ultrasound imaging but it is useful also in urology and intra-abdominal conditions.
Narrowing or occlusion of the RENAL ARTERY or arteries. It is due usually to ATHEROSCLEROSIS; FIBROMUSCULAR DYSPLASIA; THROMBOSIS; EMBOLISM, or external pressure. The reduced renal perfusion can lead to renovascular hypertension (HYPERTENSION, RENOVASCULAR).
Procedures in which placement of CARDIAC CATHETERS is performed for therapeutic or diagnostic procedures.
Narrowing or stricture of any part of the CAROTID ARTERIES, most often due to atherosclerotic plaque formation. Ulcerations may form in atherosclerotic plaques and induce THROMBUS formation. Platelet or cholesterol emboli may arise from stenotic carotid lesions and induce a TRANSIENT ISCHEMIC ATTACK; CEREBROVASCULAR ACCIDENT; or temporary blindness (AMAUROSIS FUGAX). (From Adams et al., Principles of Neurology, 6th ed, pp 822-3)
Either of the two principal arteries on both sides of the neck that supply blood to the head and neck; each divides into two branches, the internal carotid artery and the external carotid artery.
The circulation of blood through the CORONARY VESSELS of the HEART.
Pathologic processes that affect patients after a surgical procedure. They may or may not be related to the disease for which the surgery was done, and they may or may not be direct results of the surgery.
Tunable liquid lasers with organic compounds (i.e., dye) which have a strong absorption band, used as the active medium. During emission, the dye has to be optically excited by another light source (e.g., another laser or flash lamp). The range of the emission wavelength may be anywhere from the ultraviolet to the near infrared (i.e., from 180 to 1100nm). These lasers are operated in continuous wave and pulsed modes. (UMDNS, 2005)
A symptom complex characterized by pain and weakness in SKELETAL MUSCLE group associated with exercise, such as leg pain and weakness brought on by walking. Such muscle limpness disappears after a brief rest and is often relates to arterial STENOSIS; muscle ISCHEMIA; and accumulation of LACTATE.
The nonstriated involuntary muscle tissue of blood vessels.
A scanning microscope-based, cytofluorimetry technique for making fluorescence measurements and topographic analysis on individual cells. Lasers are used to excite fluorochromes in labeled cellular specimens. Fluorescence is detected in multiple discrete wavelengths and the locational data is processed to quantitatively assess APOPTOSIS; PLOIDIES; cell proliferation; GENE EXPRESSION; PROTEIN TRANSPORT; and other cellular processes.
Drugs or agents which antagonize or impair any mechanism leading to blood platelet aggregation, whether during the phases of activation and shape change or following the dense-granule release reaction and stimulation of the prostaglandin-thromboxane system.
The inferior part of the lower extremity between the KNEE and the ANKLE.
Thickening and loss of elasticity of the walls of ARTERIES of all sizes. There are many forms classified by the types of lesions and arteries involved, such as ATHEROSCLEROSIS with fatty lesions in the ARTERIAL INTIMA of medium and large muscular arteries.
The act of dilating.
A repeat operation for the same condition in the same patient due to disease progression or recurrence, or as followup to failed previous surgery.
Studies to determine the advantages or disadvantages, practicability, or capability of accomplishing a projected plan, study, or project.
Coagulation of blood in any of the CORONARY VESSELS. The presence of a blood clot (THROMBUS) often leads to MYOCARDIAL INFARCTION.
Narrowing of the passage through the MITRAL VALVE due to FIBROSIS, and CALCINOSIS in the leaflets and chordal areas. This elevates the left atrial pressure which, in turn, raises pulmonary venous and capillary pressure leading to bouts of DYSPNEA and TACHYCARDIA during physical exertion. RHEUMATIC FEVER is its primary cause.
Devices to be inserted into veins or arteries for the purpose of carrying fluids into or from a peripheral or central vascular location. They may include component parts such as catheters, ports, reservoirs, and valves. They may be left in place temporarily for therapeutic or diagnostic purposes.
The restoration of blood supply to the myocardium. (From Dorland, 28th ed)
A mixture of metallic elements or compounds with other metallic or metalloid elements in varying proportions.
Pathological processes of CORONARY ARTERIES that may derive from a congenital abnormality, atherosclerotic, or non-atherosclerotic cause.
Narrowing or constriction of a coronary artery.
The vein which drains the foot and leg.
Ultrasonography applying the Doppler effect combined with real-time imaging. The real-time image is created by rapid movement of the ultrasound beam. A powerful advantage of this technique is the ability to estimate the velocity of flow from the Doppler shift frequency.
Recording of the moment-to-moment electromotive forces of the HEART as projected onto various sites on the body's surface, delineated as a scalar function of time. The recording is monitored by a tracing on slow moving chart paper or by observing it on a cardioscope, which is a CATHODE RAY TUBE DISPLAY.
A surgical procedure to correct MYOPIA by CORNEAL STROMA subtraction. It involves the use of a microkeratome to make a lamellar dissection of the CORNEA creating a flap with intact CORNEAL EPITHELIUM. After the flap is lifted, the underlying midstroma is reshaped with an EXCIMER LASER and the flap is returned to its original position.
Precordial pain at rest, which may precede a MYOCARDIAL INFARCTION.
Pathological processes involving any one of the BLOOD VESSELS in the vasculature outside the HEART.
The excision of the thickened, atheromatous tunica intima of a carotid artery.
An alternative to amputation in patients with neoplasms, ischemia, fractures, and other limb-threatening conditions. Generally, sophisticated surgical procedures such as vascular surgery and reconstruction are used to salvage diseased limbs.
Vascular diseases characterized by thickening and hardening of the walls of ARTERIES inside the SKULL. There are three subtypes: (1) atherosclerosis with fatty deposits in the ARTERIAL INTIMA; (2) Monckeberg's sclerosis with calcium deposits in the media and (3) arteriolosclerosis involving the small caliber arteries. Clinical signs include HEADACHE; CONFUSION; transient blindness (AMAUROSIS FUGAX); speech impairment; and HEMIPARESIS.
An aspect of personal behavior or lifestyle, environmental exposure, or inborn or inherited characteristic, which, on the basis of epidemiologic evidence, is known to be associated with a health-related condition considered important to prevent.
Formation and development of a thrombus or blood clot in the blood vessel.
The species Oryctolagus cuniculus, in the family Leporidae, order LAGOMORPHA. Rabbits are born in burrows, furless, and with eyes and ears closed. In contrast with HARES, rabbits have 22 chromosome pairs.
Surgical insertion of BLOOD VESSEL PROSTHESES to repair injured or diseased blood vessels.
A measure of the quality of health care by assessment of unsuccessful results of management and procedures used in combating disease, in individual cases or series.
Endoscopic examination, therapy or surgery performed on the interior of blood vessels.
Surgical shunt allowing direct passage of blood from an artery to a vein. (From Dorland, 28th ed)
Generally, restoration of blood supply to heart tissue which is ischemic due to decrease in normal blood supply. The decrease may result from any source including atherosclerotic obstruction, narrowing of the artery, or surgical clamping. Reperfusion can be induced to treat ischemia. Methods include chemical dissolution of an occluding thrombus, administration of vasodilator drugs, angioplasty, catheterization, and artery bypass graft surgery. However, it is thought that reperfusion can itself further damage the ischemic tissue, causing MYOCARDIAL REPERFUSION INJURY.
Maintenance of blood flow to an organ despite obstruction of a principal vessel. Blood flow is maintained through small vessels.
Hypertension due to RENAL ARTERY OBSTRUCTION or compression.
The new and thickened layer of scar tissue that forms on a PROSTHESIS, or as a result of vessel injury especially following ANGIOPLASTY or stent placement.
Use of HIRUDINS as an anticoagulant in the treatment of cardiological and hematological disorders.
Fibrinolysin or agents that convert plasminogen to FIBRINOLYSIN.
The removal of a limb or other appendage or outgrowth of the body. (Dorland, 28th ed)
A value equal to the total volume flow divided by the cross-sectional area of the vascular bed.
Univalent antigen-binding fragments composed of one entire IMMUNOGLOBULIN LIGHT CHAIN and the amino terminal end of one of the IMMUNOGLOBULIN HEAVY CHAINS from the hinge region, linked to each other by disulfide bonds. Fab contains the IMMUNOGLOBULIN VARIABLE REGIONS, which are part of the antigen-binding site, and the first IMMUNOGLOBULIN CONSTANT REGIONS. This fragment can be obtained by digestion of immunoglobulins with the proteolytic enzyme PAPAIN.
An idiopathic, segmental, nonatheromatous disease of the musculature of arterial walls, leading to STENOSIS of small and medium-sized arteries. There is true proliferation of SMOOTH MUSCLE CELLS and fibrous tissue. Fibromuscular dysplasia lesions are smooth stenosis and occur most often in the renal and carotid arteries. They may also occur in other peripheral arteries of the extremity.
Branch of the common carotid artery which supplies the anterior part of the brain, the eye and its appendages, the forehead and nose.
The region of the lower limb in animals, extending from the gluteal region to the FOOT, and including the BUTTOCKS; HIP; and LEG.
A highly acidic mucopolysaccharide formed of equal parts of sulfated D-glucosamine and D-glucuronic acid with sulfaminic bridges. The molecular weight ranges from six to twenty thousand. Heparin occurs in and is obtained from liver, lung, mast cells, etc., of vertebrates. Its function is unknown, but it is used to prevent blood clotting in vivo and vitro, in the form of many different salts.
Blocking of a blood vessel by an embolus which can be a blood clot or other undissolved material in the blood stream.
A flexible, tubular device that is used to carry fluids into or from a blood vessel, hollow organ, or body cavity.
Device constructed of either synthetic or biological material that is used for the repair of injured or diseased blood vessels.
A collective term for interstitial, intracavity, and surface radiotherapy. It uses small sealed or partly-sealed sources that may be placed on or near the body surface or within a natural body cavity or implanted directly into the tissues.
The use of balloon CATHETERS to remove emboli by retraction of the balloon that is inflated behind the EMBOLUS.
Motion picture study of successive images appearing on a fluoroscopic screen.
Surgical removal of an obstructing clot or foreign material from a blood vessel at the point of its formation. Removal of a clot arising from a distant site is called EMBOLECTOMY.
Operative procedures for the treatment of vascular disorders.
Motion pictures of the passage of contrast medium through blood vessels.
Shock resulting from diminution of cardiac output in heart disease.
A method of delineating blood vessels by subtracting a tissue background image from an image of tissue plus intravascular contrast material that attenuates the X-ray photons. The background image is determined from a digitized image taken a few moments before injection of the contrast material. The resulting angiogram is a high-contrast image of the vessel. This subtraction technique allows extraction of a high-intensity signal from the superimposed background information. The image is thus the result of the differential absorption of X-rays by different tissues.
A disorder of cardiac function caused by insufficient blood flow to the muscle tissue of the heart. The decreased blood flow may be due to narrowing of the coronary arteries (CORONARY ARTERY DISEASE), to obstruction by a thrombus (CORONARY THROMBOSIS), or less commonly, to diffuse narrowing of arterioles and other small vessels within the heart. Severe interruption of the blood supply to the myocardial tissue may result in necrosis of cardiac muscle (MYOCARDIAL INFARCTION).
Homopolymer of tetrafluoroethylene. Nonflammable, tough, inert plastic tubing or sheeting; used to line vessels, insulate, protect or lubricate apparatus; also as filter, coating for surgical implants or as prosthetic material. Synonyms: Fluoroflex; Fluoroplast; Ftoroplast; Halon; Polyfene; PTFE; Tetron.
Complications that affect patients during surgery. They may or may not be associated with the disease for which the surgery is done, or within the same surgical procedure.
A branch of the abdominal aorta which supplies the kidneys, adrenal glands and ureters.
The treatment of a disease or condition by several different means simultaneously or sequentially. Chemoimmunotherapy, RADIOIMMUNOTHERAPY, chemoradiotherapy, cryochemotherapy, and SALVAGE THERAPY are seen most frequently, but their combinations with each other and surgery are also used.
Levels within a diagnostic group which are established by various measurement criteria applied to the seriousness of a patient's disorder.
Artery arising from the brachiocephalic trunk on the right side and from the arch of the aorta on the left side. It distributes to the neck, thoracic wall, spinal cord, brain, meninges, and upper limb.
Radiography of the vascular system of the brain after injection of a contrast medium.
A vital statistic measuring or recording the rate of death from any cause in hospitalized populations.
Agents that affect the rate or intensity of cardiac contraction, blood vessel diameter, or blood volume.
The qualitative or quantitative estimation of the likelihood of adverse effects that may result from exposure to specified health hazards or from the absence of beneficial influences. (Last, Dictionary of Epidemiology, 1988)
The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM.
Biocompatible materials usually used in dental and bone implants that enhance biologic fixation, thereby increasing the bond strength between the coated material and bone, and minimize possible biological effects that may result from the implant itself.
A clinically significant reduction in blood supply to the BRAIN STEM and CEREBELLUM (i.e., VERTEBROBASILAR INSUFFICIENCY) resulting from reversal of blood flow through the VERTEBRAL ARTERY from occlusion or stenosis of the proximal subclavian or brachiocephalic artery. Common symptoms include VERTIGO; SYNCOPE; and INTERMITTENT CLAUDICATION of the involved upper extremity. Subclavian steal may also occur in asymptomatic individuals. (From J Cardiovasc Surg 1994;35(1):11-4; Acta Neurol Scand 1994;90(3):174-8)
The plan and delineation of prostheses in general or a specific prosthesis.
Agents that prevent clotting.
Diagnostic and therapeutic procedures that are invasive or surgical in nature, and require the expertise of a specially trained radiologist. In general, they are more invasive than diagnostic imaging but less invasive than major surgery. They often involve catheterization, fluoroscopy, or computed tomography. Some examples include percutaneous transhepatic cholangiography, percutaneous transthoracic biopsy, balloon angioplasty, and arterial embolization.
A type of stress exerted uniformly in all directions. Its measure is the force exerted per unit area. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Catheters inserted into various locations within the heart for diagnostic or therapeutic purposes.
Surgical excision, performed under general anesthesia, of the atheromatous tunica intima of an artery. When reconstruction of an artery is performed as an endovascular procedure through a catheter, it is called ATHERECTOMY.
Localized or diffuse reduction in blood flow through the vertebrobasilar arterial system, which supplies the BRAIN STEM; CEREBELLUM; OCCIPITAL LOBE; medial TEMPORAL LOBE; and THALAMUS. Characteristic clinical features include SYNCOPE; lightheadedness; visual disturbances; and VERTIGO. BRAIN STEM INFARCTIONS or other BRAIN INFARCTION may be associated.
Stents that are covered with materials that are embedded with chemicals that are gradually released into the surrounding milieu.
Summarizing techniques used to describe the pattern of mortality and survival in populations. These methods can be applied to the study not only of death, but also of any defined endpoint such as the onset of disease or the occurrence of disease complications.
Genetically developed small pigs for use in biomedical research. There are several strains - Yucatan miniature, Sinclair miniature, and Minnesota miniature.
A class of statistical procedures for estimating the survival function (function of time, starting with a population 100% well at a given time and providing the percentage of the population still well at later times). The survival analysis is then used for making inferences about the effects of treatments, prognostic factors, exposures, and other covariates on the function.
The anterior and posterior arteries created at the bifurcation of the popliteal artery. The anterior tibial artery begins at the lower border of the popliteus muscle and lies along the tibia at the distal part of the leg to surface superficially anterior to the ankle joint. Its branches are distributed throughout the leg, ankle, and foot. The posterior tibial artery begins at the lower border of the popliteus muscle, lies behind the tibia in the lower part of its course, and is found situated between the medial malleolus and the medial process of the calcaneal tuberosity. Its branches are distributed throughout the leg and foot.
Situations or conditions requiring immediate intervention to avoid serious adverse results.
Criteria and standards used for the determination of the appropriateness of the inclusion of patients with specific conditions in proposed treatment plans and the criteria used for the inclusion of subjects in various clinical trials and other research protocols.
The proportion of survivors in a group, e.g., of patients, studied and followed over a period, or the proportion of persons in a specified group alive at the beginning of a time interval who survive to the end of the interval. It is often studied using life table methods.
Techniques using a laser to cut away and harvest a specific cell or cluster of cells from a tissue section while viewing it under the microscope.
Blocking of a blood vessel in the SKULL by an EMBOLUS which can be a blood clot (THROMBUS) or other undissolved material in the blood stream. Most emboli are of cardiac origin and are associated with HEART DISEASES. Other non-cardiac sources of emboli are usually associated with VASCULAR DISEASES.
A distribution in which a variable is distributed like the sum of the squares of any given independent random variable, each of which has a normal distribution with mean of zero and variance of one. The chi-square test is a statistical test based on comparison of a test statistic to a chi-square distribution. The oldest of these tests are used to detect whether two or more population distributions differ from one another.
Naturally occurring or experimentally induced animal diseases with pathological processes sufficiently similar to those of human diseases. They are used as study models for human diseases.
Interfacility or intrahospital transfer of patients. Intrahospital transfer is usually to obtain a specific kind of care and interfacility transfer is usually for economic reasons as well as for the type of care provided.
Failure of equipment to perform to standard. The failure may be due to defects or improper use.
The prototypical analgesic used in the treatment of mild to moderate pain. It has anti-inflammatory and antipyretic properties and acts as an inhibitor of cyclooxygenase which results in the inhibition of the biosynthesis of prostaglandins. Aspirin also inhibits platelet aggregation and is used in the prevention of arterial and venous thrombosis. (From Martindale, The Extra Pharmacopoeia, 30th ed, p5)
A pathological constriction that can occur above (supravalvular stenosis), below (subvalvular stenosis), or at the AORTIC VALVE. It is characterized by restricted outflow from the LEFT VENTRICLE into the AORTA.
Single-chain polypeptides of about 65 amino acids (7 kDa) from LEECHES that have a neutral hydrophobic N terminus, an acidic hydrophilic C terminus, and a compact, hydrophobic core region. Recombinant hirudins lack tyr-63 sulfation and are referred to as 'desulfato-hirudins'. They form a stable non-covalent complex with ALPHA-THROMBIN, thereby abolishing its ability to cleave FIBRINOGEN.
The hemodynamic and electrophysiological action of the left HEART VENTRICLE. Its measurement is an important aspect of the clinical evaluation of patients with heart disease to determine the effects of the disease on cardiac performance.

Treatment of in-stent restenosis with excimer laser coronary angioplasty versus rotational atherectomy: comparative mechanisms and results. (1/46)

BACKGROUND: Atheroablation yields improved clinical results for balloon angioplasty (percutaneous transluminal coronary angioplasty, PTCA) in the treatment of diffuse in-stent restenosis (ISR). METHODS AND RESULTS: We compared the mechanisms and clinical results of excimer laser coronary angioplasty (ELCA) versus rotational atherectomy (RA), both followed by adjunct PTCA; 119 patients (158 ISR lesions) were treated with ELCA+PTCA and 130 patients (161 ISR lesions) were treated with RA+PTCA. Quantitative coronary angiographic and planar intravascular ultrasound (IVUS) measurements were performed routinely. In addition, volumetric IVUS analysis to compare the mechanisms of lumen enlargement was performed in 28 patients with 30 lesions (16 ELCA+PTCA, 14 RA+PTCA). There were no significant between-group differences in preintervention or final postintervention quantitative coronary angiographic or planar IVUS measurements of luminal dimensions. Angiographic success and major in-hospital complications with the 2 techniques were also similar. Volumetric IVUS analysis showed significantly greater reduction in intimal hyperplasia volume after RA than after ELCA (43+/-14 versus 19+/-10 mm(3), P<0.001) because of a significantly higher ablation efficiency (90+/-10% versus 76+/-12%, P = 0.004). However, both interventional strategies had similar long-term clinical outcome; 1-year target lesion revascularization rate was 26% with ELCA+PTCA versus 28% with RA+PTCA (P = NS). CONCLUSIONS: Despite certain differences in the mechanisms of lumen enlargement, both ELCA+PTCA and RA+PTCA can be used to treat diffuse ISR with similar clinical results.  (+info)

Six-month clinical and angiographic outcome after successful excimer laser angioplasty for in-stent restenosis. (2/46)

OBJECTIVES: This study evaluated the clinical and angiographic six-month follow-up after excimer laser coronary angioplasty (ELCA) for restenosed coronary stents. BACKGROUND: Excimer laser coronary angioplasty has recently been shown to be safe and efficient for the treatment of in-stent restenosis. METHODS: Ninety-six consecutive patients successfully treated with ELCA within 141 stents were included in a six-month clinical and angiographic follow-up. RESULTS: During follow-up there was one sudden death and one patient with documented myocardial infarction. Angina pectoris classified as > or = Canadian Cardiovascular Society II reoccurred in 49 patients. Follow-up angiography was obtained in 89 patients (93%) with 133 stents. Quantitative coronary angiography revealed a mean diameter stenosis of 77 +/- 10% before intervention, 41 +/- 12% after laser treatment and 11% +/- 12% after adjunctive percutaneous transluminal coronary angioplasty (p < 0.001). Six months after ELCA the mean diameter stenosis had increased to 60 +/- 26% (p < 0.001). A > or =50% diameter stenosis was present in 48 patients (54%); in 24 of these patients diameter stenosis was > or =70%. Total occlusions occurred in an additional 10 patients (11%). There was a trend toward an increased recurrent restenosis rate in patients with diabetes mellitus and long lesions or total occlusions (p = 0.059). Forty-eight patients (50%) received medical treatment after six months. Reinterventions were necessary in 30 patients (31%), and coronary artery bypass surgery was performed in 17 patients (18%). Event-free survival was 50%. CONCLUSIONS: Excimer laser angioplasty for in-stent restenosis was associated with a high incidence of recurrent restenosis in this group of patients, suggesting that this technique is unlikely to reduce recurrent in-stent restenosis and that other approaches are necessary.  (+info)

Clinical and angiographic outcome in patients with in-stent restenosis and repeat target lesion revascularisation in small coronary arteries. (3/46)

OBJECTIVE: To evaluate the clinical and angiographic outcome in patients with in-stent restenosis in small coronary arteries and repeat target lesion revascularisation. DESIGN: Patients with in-stent restenosis in coronary arteries < or = 2.85 mm were eligible for the study and underwent target lesion revascularisation. Clinical and angiographic variables were assessed during a six month follow up period. RESULTS: 73 patients with 79 lesions were treated by percutaneous transluminal coronary angioplasty (47%), excimer laser angioplasty (25%), or restenting (28%). The mean (SD) reference diameter before target lesion revascularisation was 2.12 (0.5) mm. Procedural success was achieved in all cases, but 57% of the patients had restenosis after six months. The rate of further restenosis was higher with laser angioplasty (78%) than with restenting (47%) or balloon angioplasty alone (49%, p < 0.05). CONCLUSIONS: Treatment for in-stent restenosis in small coronary arteries is feasible and safe, with a second restenosis rate comparable to large coronary artery series. The strategy of target lesion revascularisation influences further in-stent restenosis, with an increased rate with laser angioplasty compared with restenting and repeat dilatation alone.  (+info)

Treatment of in-stent coronary restenosis with excimer laser angioplasty. (4/46)

OBJECTIVE: To evaluate the efficacy and safety of excimer laser coronary angioplasty (ELCA) with adjunctive balloon angioplasty in patient with in-stent restenosis. METHODS: ELCA was performed in 20 patients of instent restenosis. All patients were symptomatic and had class III-IV angina. ELCA was performed with the Spectranetics CVX-300 System. The laser catheter of Vittesse C (concentric) and E (eccentric) with diameter of 1.4-2.0 mm was used. RESULTS: Laser catheter crossed all stenotic stents without difficulty. The lesion length was 4.6-51.2 mm, mean 20.7 +/- 13.7 mm, including 14 lesions > 10 mm. Laser treatment alone increased minimal lumen diameter (MLD) from 0.3 +/- 0.3 mm to 1.4 +/- 0.3 mm (P < 0.0001) and improved the diameter stenosis from 88.8% +/- 10.0% to 46.0% +/- 8.0% (P < 0.0001). Adjunctive balloon angioplasty further increased minimal lumen diameter to 2.3 +/- 0.7 mm and reduced diameter stenosis to 14.2% +/- 8.2% (P < 0.0001). At follow-up (1-17 months, mean 8.9 +/- 5.7 months), 17 (85%) patients had remained asymptomatic, 3 (15%) patients had mild to moderate exertional angina, 1 (5%) patient received CABG. CONCLUSION: ELCA with adjunctive percutaneous transluminal coronary angioplasty (PTCA) is an efficient and safe technique to debulk tissue in the patient with in-stent restenosis. The incidence of procedural related complication was low and ELCA may be used as a good method for in-stent restenosis treatment.  (+info)

Coronary flow velocity and disturbed flow predict adverse clinical outcome after coronary angioplasty. (5/46)

OBJECTIVE: Laminar flow becomes disturbed at high velocities, reducing shear stress and augmenting vascular inflammation and proliferation, processes that are pivotal in restenosis and atherogenesis. We hypothesized that disturbed blood flow after coronary angioplasty is associated with adverse long-term clinical outcome. METHODS AND RESULTS: The cineangiograms from 97 patients undergoing laser-assisted coronary angioplasty were analyzed. Coronary blood flow velocity, the residual lesion dimensions, and the Reynolds number (an index of disturbed flow) were measured by using a frame-counting technique and quantitative coronary angiography. Cox proportional hazards were used to assess the relative risk of adverse events (target-vessel revascularization, myocardial infarction, or death) over a mean 2.5 years after the index procedure. There were 41 adverse events during 245 patient years of follow-up (17% per year of follow-up). The risk of an adverse event was increased for patients with a high flow velocity (>250 mm/s; relative risk 2.5, 95% CI 1.3 to 4.7) or a high Reynolds number (>200) at the stenosis inlet (relative risk 2.1, 95% CI 1.1 to 4.1) at the end of the procedure. Adjustment for other factors did not alter these results. CONCLUSIONS: High Reynolds numbers, indicating disturbed blood flow after coronary angioplasty, increase the risk of adverse clinical events, potentially through shear-stress-related molecular mechanisms that promote restenosis and atherogenesis.  (+info)

Excimer laser-assisted high-flow extracranial/intracranial bypass in patients with symptomatic carotid artery occlusion at high risk of recurrent cerebral ischemia: safety and long-term outcome. (6/46)

BACKGROUND AND PURPOSE: The goal of this study was to determine safety and long-term outcome of the excimer laser-assisted high-flow extracranial/intracranial (EC/IC) bypass in patients with symptomatic carotid artery occlusion (CAO) at high risk of recurrent stroke. METHODS: In a prospectively collected cohort of 103 patients with symptomatic CAO, 15 patients were selected for excimer laser-assisted EC/IC bypass surgery on the basis of predefined selection criteria: (1) transient or moderately disabling symptoms of focal cerebral ischemia, not symptoms of the retina only; (2) continuing symptoms after documentation of the CAO; (3) evidence of a possible hemodynamic origin of symptoms; and (4) informed consent of the patient. RESULTS: Eleven patients underwent the operation without complications One patient had a severely disabling stroke (Rankin grade 4) 11 days after the operation; the bypass was found occluded on reoperation. Two other patients had a moderately disabling stroke (Rankin grade 3) immediately after the operation. One patient died of myocardial infarction 1 day after surgery. Median follow-up time was 27 months. Of the 11 patients who underwent the operation without complications, 1 died 17 months after the operation of a brainstem stroke, and another patient had a new stroke ipsilateral to his CAO 10 months after the operation but without a change in Rankin grade. CONCLUSIONS: The excimer laser-assisted high-flow EC/IC bypass operation is a potentially promising procedure in patients with symptomatic CAO and a presumably high risk of recurrent stroke, but the procedure carries a definite risk. This risk is probably related not only to the procedure itself but also to the selection of patients.  (+info)

Treatment of in-stent restenosis with excimer laser coronary angioplasty. (7/46)

Diffuse in-stent restenosis remains an important problem in percutaneous transluminal coronary angioplasty (PTCA). In this trial, we studied the early and mid-term outcomes of excimer laser coronary angioplasty (ELCA) on diffuse in-stent restenosis. ELCA was performed in 23 patients (19 males). The mean length of the lesions was 14.3 +/- 3 mm and the mean age was 58 +/- 7 years. The minimal lumen diameter (MLD) was measured by on-line quantitative coronary angiography. Before the procedure, MLD was 0.9 +/- 0.4. The Q/non-Q-wave myocardial infarction (MI), coronary artery bypass graft (CABG), PTCA, and mortality were recorded during the procedure and at 6 months follow up. The fluence of laser emission was 45 mj/m2 and the repetition rate was 25 pulses per second. Adjunctive balloon angioplasty was performed in all of the cases at a mean 7 +/- 2 atm pressure. The procedure was successfully performed in all of the cases. Type-B dissection developed, after ELCA in 1 patient (4%). Perforation, death, cerebrovascular accidents, emergency CABG, PTCA or Q/non-Q wave myocardial infarction were not observed. MLD was 0.9 +/- 0.4 mm before ELCA, 1.8 +/- 0.9 mm (P<0.05) after ELCA, and 3.1 +/- 0.7 mm after PTCA. At 6 months follow up, there were 2 (8.7%) Q-wave myocardial infarctions and 2 (8.7%) recurrent anginal pain cases. Control angiography was obtained in 20 cases (87%). Control angiography was not accepted by 3 patients. Their maximal exercise test was negative. Angiographic restenosis was observed in 6 cases (30%). The rate of target lesion revascularization (TLR) was 5 of 23 (22%) in the patients treated with ELCA. It is concluded, ELCA is a safe and efficient debulking technology for treating diffuse in-stent restenosis.  (+info)

Intracoronary ultrasound predictors of adverse outcomes after coronary artery interventions. (8/46)

OBJECTIVES: The purpose of this study was to determine the association between qualitative and quantitative lesion characteristics as assessed by intracoronary ultrasound imaging and adverse outcomes after coronary artery interventions. BACKGROUND: Restenosis and other adverse outcomes after coronary artery interventions may be difficult to predict from clinical or angiographic data. Intracoronary ultrasound imaging provides additional data that could prove useful. METHODS: Immediately after successful coronary artery interventions (angiographic residual stenosis < or = 50%), 69 patients underwent intracoronary ultrasound imaging. Images were assessed qualitatively for plaque composition and topography and for dissection. Quantitative data included measurement of minimal lumen diameter, lumen area, plaque area and percent area stenosis at the treatment and adjacent reference sites. Adverse outcome was defined as death, coronary bypass surgery, myocardial infarction or angiographic restenosis. RESULTS: Of the 69 patients, 1 died, 3 had bypass surgery and 1 had a myocardial infarction before planned 6-month repeat catheterization. Two patients were lost to follow-up study. Of the remaining 62 patients, 56 (90%) agreed to follow-up catheterization and 25 (45%) of the 56 had restenosis. Thus, 30 patients had an adverse outcome and 37 had no adverse event. The incidence of dissection detected by ultrasound imaging after an intervention was significantly greater in patients with than in those without a subsequent adverse event (63% vs. 35%, p < 0.05). The severity of dissection also appeared to be related to outcome (p < 0.05). Other qualitative and quantitative variables were not significantly different between the two patient groups. CONCLUSIONS: Dissection, as assessed by intracoronary ultrasound imaging after a coronary artery intervention, can identify patients at increased risk of subsequent adverse events. Additional studies are warranted to explore whether such imaging may allow modification of interventional procedures to improve outcome.  (+info)

Laser atherectomy might decrease procedural complications during percutaneous coronary intervention (PCI) of degenerated saphenous vein grafts (SVGs) in case of unstable or thrombotic lesions because of its ability to debulk and vaporize thrombus. We aimed at prospectively evaluating the safety and efficacy of excimer laser coronary angioplasty (ELCA) as a primary treatment strategy in consecutively unstable patients undergoing PCI of degenerated SVG lesions. Seventy-one consecutive patients with non-ST elevation acute coronary syndrome (mean age 69 ± 10 years, 66 men [89%]) undergoing PCI of degenerated SVG were enrolled in a prospective case-control registry, using 2 different distal protection devices (DPDs; FilterWire EZ [Boston Scientific, Natick, Massachusetts; n = 24] and SpiderRX [Ev3, Plymouth, Minnesota; n = 23]) or ELCA (n = 24 ...
To help elucidate the mechanism of excimer laser coronary angioplasty (ELCA), intravascular ultrasound (IVUS) imaging was performed in 19 of 29 patients who were treated with ELCA. The results were compared with a non-randomized control group of 18 p
From February to August 1997, 64 patients were enrolled in a study of intracoronary gamma radiation for in-stent restenosis. In the present study, we analyzed 37 lesions (31 native coronary and 6 vein graft) in 36 patients (age, 62±10 years; 24 men) previously treated with Palmaz-Schatz stents (Cordis). Reasons for exclusion were restenting of the lesions (n=13), no delayed (n=6) or inadequate IVUS (n=1), in-stent tissue ,75% of stent cross-sectional area (CSA; n=2), restenosis localized to stent margin(s) (n=1), or presence of non-Palmaz-Schatz stents (n=5). (One patient had 2 lesions; per protocol, only 1 was enrolled in the radiation trial.) There were 65 stents (1.8 per lesion), implanted 9.6±8.3 months previously. Fifteen patients (40%) had prior in-stent restenosis; the last episode was 5.5±3.3 months previously.. Primary treatment strategy was determined by the operator: PTCA (n=8), excimer laser coronary angioplasty (ELCA; Spectranetics; n=12) + adjunct PTCA, or rotational atherectomy ...
Fingerprint Dive into the research topics of Coronary hemodynamics before and after rotational atherectomy with adjunctive balloon angioplasty. Together they form a unique fingerprint. ...
A technique utilizing a laser coupled to a catheter which is used in the dilatation of occluded blood vessels. This includes laser thermal angioplasty where the laser energy heats up a metal tip, and direct laser angioplasty where the laser energy directly ablates the occlusion. One form of the latter approach uses an EXCIMER LASER which creates microscopically precise cuts without thermal injury. When laser angioplasty is performed in combination with balloon angioplasty it is called laser-assisted balloon angioplasty (ANGIOPLASTY, BALLOON, LASER-ASSISTED ...
Object. If clip application or coil placement for treatment of intracranial aneurysms is not feasible, the parent vessel can be occluded to induce thrombosis of the aneurysm. The Excimer laser-assisted anastomosis technique allows the construction of a high-flow bypass in patients who cannot tolerate such an occlusion. The authors assessed the complications of this procedure and clinical outcomes after the construction of high-flow bypasses in patients with intracranial aneurysms.. Methods. Data were retrospectively collected on patient and aneurysm characteristics, procedural complications, and functional outcomes in 77 patients in whom a high-flow bypass was constructed. Logistic regression analysis was used to quantify the relationships between patient and aneurysm characteristics on the one hand and outcome measures on the other.. Fifty-one patients harbored a giant aneurysm, 24 patients suffered from a ruptured aneurysm, and 35 patients from an unruptured symptomatic aneurysm. In 22 ...
The goal of this study was to validate the CT MCA dot sign, including direct comparison with the gold standard of conventional cerebral catheter angiography. Angiographic comparison demonstrated that the MCA dot sign clearly has diagnostic value as a highly specific and moderately sensitive indicator of acute thrombus or slow flow within the M2 or M3 branches of the MCA. In addition, in our analysis, both the MCA dot sign and the HMCA sign demonstrated good interrater reliability. We detected the presence of an MCA dot sign on CT in 16.7%, similar to the 16% incidence observed by Barber and colleagues16 in their acute stroke patient population.. The MCA dot sign also demonstrated good prognostic value. The presence of an isolated MCA dot sign, an MCA dot sign in conjunction with an HMCA sign, or an isolated HMCA sign were all associated with more severe neurological deficits at the time of patient presentation than the absence of any CT-visible intraluminal thrombosis. There was a trend for ...
Global Laser Atherectomy Devices Market which allows the consumer to assess the long-term based demand and estimate particular implementations. The increasing growth which is truly expected depending on the analysis gives comprehensive information on the global Laser Atherectomy Devices Market. The drivers and restraints are preparing after the whole awareness of the global Laser Atherectomy Devices industry growth.. Global Laser Atherectomy Devices market research report provides the newest industry data and industry future trends. It permits you to recognize the products and complete users managing Revenue growth and profitability. The Laser Atherectomy Devices industry report lists the leading competitors and provides the game-changing strategic analysis of the key factors driving the market. The report involves the forecasts by 2020-2029 and analysis of significant industry trends, market size, market share forecasts, and profiles of the top Laser Atherectomy Devices industry players.. FREE ...
TY - JOUR. T1 - Laser angioplasty of restenosed coronary stents. T2 - Results of a multicenter surveillance trial. AU - Köster, Ralf. AU - Hamm, Christian W.. AU - Seabra-Gomes, Ricardo. AU - Herrmann, Gunhild. AU - Sievert, Horst. AU - Macaya, Carlos. AU - Fleck, Eckart. AU - Fischer, Klaus. AU - Bonnier, Johannes J R M. AU - Fajadet, Jean. AU - Waigand, J. ürgen. AU - Kuck, Karl Heinz. AU - Henry, Michel. AU - Morice, Marie Claude. AU - Pizzulli, Luciano. AU - Webb-Peploe, Michael M.. AU - Buchwald, Arnd B.. AU - Ekström, Lars. AU - Grube, Eberhard. AU - Al Kasab, Saad. AU - Colombo, Antonio. AU - Sanati, Archimedes. AU - Ernst, Sjef M P G. AU - Haude, Michael. AU - Leon, Martin B.. AU - Ilsley, Charles. AU - Beyar, Rafael. AU - Taeymans, Yvo. AU - Gladbach, Uwe. AU - Wegscheider, Karl. AU - Serruys, Patrick W.. PY - 1999/7. Y1 - 1999/7. N2 - OBJECTIVES: This study evaluated safety and efficacy of excimer laser angioplasty for treatment of restenosed or occluded coronary stents. BACKGROUND: ...
The research report presents a comprehensive outlook on the Global Laser Atherectomy Devices Market contains thoughtful insights, facts, historical data, and statistically supported and industry-validated market data. It also contains projections using a suitable set of assumptions and methodologies. The research report provides analysis and information according to categories such as market segments, geographies, types, technology and applications. The Laser Atherectomy Devices Market research report provides the newest industry data and industry future trends, allowing you to identify the products and end users driving revenue growth and profitability.It furthermore has an assessment of the factors influencing the demand and supply of the associated products and services, and challenges witnessed by market players. Moreover, the report is made with different graphical representation with the precise arrangement of key outlines, strategic diagrams, and descriptive figures based on the reliable ...
[96 Pages Report] Check for Discount on United States Laser Atherectomy Devices Market Report 2017 report by QYResearch Group. In this report, the United States Laser Atherectomy Devices market...
A fiber-optic waveguide, used for ablating lesions in blood vessels, is mounted within and guided by a catheter having multiple lumens extending therethrough and parallel to each other. The waveguide fits within at least one lumen and a guidewire, previously inserted in a blood vessel, extends through another lumen. The distal end of the waveguide can have a short section of larger diameter fiber fused to it to cause a laser beam transmitted through the fiber to expand as it emerges from the waveguide to provide a larger ablation area. The waveguide may also be connected to an energy source by means of an energy coupler.
TY - JOUR. T1 - Thermal-perfusion balloon coronary angioplasty. T2 - In vivo evaluation. AU - Buller, Christopher E.. AU - Culp, Stephen C.. AU - Sketch, Michael H.. AU - Phillips, Harry R.. AU - Virmani, Renu. AU - Stack, Richard S.. PY - 1993/1. Y1 - 1993/1. N2 - The goal of this study was to develop and test a new radio frequency thermal balloon system to allow longer balloon inflations at lower temperature levels than have been used with standard (laser) thermal balloon angioplasty. Radio frequency thermal capabilities were combined with perfusion balloon technology, creating a thermal-perfusion balloon catheter system for prolonged thermal inflations. Twenty-five dogs underwent thermal-perfusion angioplasty at 37°, 60°, or 80° C for 1.5, 5, or 15 minutes with angiographic and morphologic assessments at 24 hours (n = 17) or 4-6 weeks later (n = 8). Treated segments and side branches remained patent. No coronary spasm, occlusive thrombus, or ischemic myocardial infarction occurred. ...
Abstract. Laser angioplasty has been reported as a debulking tool in highly calcified stenosis and in chronic total occlusions followed by a conventional balloon angioplasty/stenting. This systematic review includes one randomized controlled trial and two case series reporting on totally 444 patients. Due to limitation in study designs, one RCT with per randomization and per protocol analysis and two case series without controls the evidence of effectiveness and safety is low. An inclusion in the reimbursement catalogue of Austrian hospitals is currently not recommended. ...
Is there a difference in the mechanisms of lumen enlargement with direct stenting as compared to stenting with predilatation? A 3D intravascular ultrasound ...
The ELCA is one of the largest Christian denominations in the United States, with more than 3.8 million members. Gods work. Our hands.
The ELCA is one of the largest Christian denominations in the United States, with more than 3.8 million members. Gods work. Our hands.
The advent of the laser has allowed the development of precision techniques to manipulate embryos for enhanced fertility. Laser-assisted hatching can turn around a history of failure for embryos to implant themselves in the uterine wall.
Laser atherectomy combined with DCB angioplasty is associated with improved oney-year outcomes for the treatment of Tosaka II and III femoropopliteal in-stent ...
The 10.6 micrometers CO2 laser is both an efficient and spatially precise photo-thermal ablation device and excellent coagulator because of the close
The |i|Journal of Biomedical Optics|/i| (JBO) publishes peer-reviewed papers on the use of novel optical systems and techniques for improved health care and biomedical research.
However, being able to visualize the vessel with the lumivascular technology is clearly appealing and suggestive of safe passage. Distal embolization remains a major concern (especially atherectomy for ISR), and questions the need for embolic protection every time (filter was used only in 22% of patients in the DEFINITVE LE trial).7 Unprecedented complications can arise, which require expertise and catheter skills and may lead to the possibility of open vascular surgery in these high-risk patients.. DA in ISR lesions have been contraindicated due to the potential risk of cutter entrapment on stent struts during atherectomy. However, with the advent of concurrent imaging during DA, this risk can potentially be avoided. Nevertheless, as seen in this case, despite adequate visualization with OCT imaging, there can be significantly malapposed stent struts in overlapped segments that may still pose a risk for trapping the DA catheter. In such scenarios, the use of adjunctive balloon angioplasty ...
Medical literature has recently focused on very late stent thrombosis (VLST) after drug-eluting stent implantation, while its mechanistic issue was not fully explored in the bare-metal stent (BMS) era. The first case is a 59-year-old man presenting with inferior non-ST-segment elevation myocardial infarction, 4 years after BMS implantation (NIR 3.5/18 mm, Boston Scientific, Galway, Ireland) for a chronic total occlusion lesion in the proximal right coronary artery. Coronary angiograms showed Thrombolysis In Myocardial Infarction (TIMI) flow grade 1 and filling defects in the BMS deployed previously, and massive red thrombi attaching to uncovered stent struts were found by angioscope (Fig. 1,Online Video 1). Thrombectomy and adjunctive balloon angioplasty were performed based on the angioscopic findings, and TIMI flow grade 3 was obtained. The second case is a 71-year-old man who was admitted for a diagnosis of inferior non-ST-segment elevation myocardial infarction 10 years after a treatment ...
Methods: The average age of the 40 patients (32 men, 8 women) included in this study was 65.4±9.1 years. The average occlusion length was 17.5 cm (range: 12-25 cm). The initial recanalization attempts were performed with stiff Terumo guidewires (curved or straight) supported by various catheters (straight/multipurpose/Cobra). After the unsuccessful attempt, an excimer laser catheter (catheter diameters from 1.7-2.5 mm) was used for recanalization using the step-by-step method of crossing. After successful crossing, balloon dilatation was performed in all cases. Stent implant was required in 10% (4/40) of procedures. Patients were followed for 12 months with colour-coded Duplex sonography (CCDS ...
The biological effects of excimer lasers and safety associated with their use were discussed. Excimer lasers operate in the 193 to 351 nanometer (nm) wavelength range producing short pulses of high energy ultraviolet (UV) radiation. They have been used to ablate tissues and nonbiological material to a small depth. As excimer lasers produce radiation in wavelengths where mutagenic and carcinogenic
A rare gas-halogen excimer laser in which the laser gases are exposed virtually only to metal and ceramic, thereby reducing contamination of the gases and optics. In one preferred embodiment magnetic fluid seals (56) are used to isolate the bearings (58) supporting the shaft (46) upon which the tangential fan (44) rotates so that the lubricated bearings do not contaminate the laser gases. The fan (44) uses magnetic coupling (70, 76) so that an isolating enclosure may be placed over the seal to prevent the leakage of gases into the environment should the seal fail. An excimer laser that is therefore both safe enough to be used in medical and industrial applications as well as reliable may be fabricated.
Background: Regulators require mechanistic observations of late lumen loss (LLL) in evaluating new drug eluting stents (DES). Redundant requirements for follow-up catheterization across regulatory jurisdictions worldwide could be reduced if independent core laboratory quantitative coronary angiography (QCA) findings were generalizable. Our study aim was to assess comparability of QCA LLL in East (Japan, China) and West (N. America, Europe) pts using the worlds largest compilation of late follow-up QCA data.. Hypothesis: The propensity adjusted mean difference in QCA in-segment LLL between East and West is ≤0.4mm, with 95% confidence.. Methods: All available data from 4 manufacturers (7157 pts, 29 trials) reporting 6-12mo QCA LLL were compiled. East vs West were compared unadjusted and via propensity score (PS) quartiles that adjusted for 26 clinical descriptive and anatomic variables affecting QCA LLL. Of the 7157 pts, 6163 (86%) had complete covariable profiles and comprised the analysis ...
COMMENT calcium accumulation into a volume of area*depth next to the membrane with a decay (time constant tau) to resting level given by the global calcium variable cai0_ca_ion ENDCOMMENT NEURON { SUFFIX ccanl USEION nca READ ncai, inca, enca WRITE enca, ncai VALENCE 2 USEION lca READ lcai, ilca, elca WRITE elca, lcai VALENCE 2 USEION tca READ tcai, itca, etca WRITE etca, tcai VALENCE 2 RANGE caiinf, catau, cai, ncai, lcai,tcai, eca, elca, enca, etca } UNITS { (mV) = (millivolt) (molar) = (1/liter) (mM) = (milli/liter) (mA) = (milliamp) FARADAY = 96520 (coul) R = 8.3134 (joule/degC) } INDEPENDENT {t FROM 0 TO 100 WITH 100 (ms)} PARAMETER { celsius = 6.3 (degC) depth = 200 (nm) : assume volume = area*depth catau = 9 (ms) caiinf = 50.e-6 (mM) : takes precedence over cai0_ca_ion : Do not forget to initialize in hoc if different : from this default. cao = 2 (mM) ica (mA/cm2) inca (mA/cm2) ilca (mA/cm2) itca (mA/cm2) cai= 50.e-6 (mM) } ASSIGNED { enca (mV) elca (mV) etca (mV) eca (mV) } STATE { ncai ...
International Journal of Engineering Inventions (IJEI) provides a multidisciplinary passage for researchers, managers, professionals, practitioners and student…
Every day, physicians and medical facilities around the world choose Ra Medical Systems excimer lasers to offer the highest caliber treatments to their patients.
If serial stenoses are less than 3 vessel reference diameters apart, they should be scored as one lesion. However, stenoses at a greater distance from each other (more than 3 vessel reference diameters), are considered as separate lesions ...
excimer, zdravotnícke centrum, Očná ambulancia, Očná optika, Excimer laserove pracovisko, Gastroenterologická ambulancia, Urologická ambulancia
Evidence-based recommendations on percutaneous laser atherectomy with balloon angioplasty (with or without stenting) for peripheral arterial disease (PAD)
Evidence-based recommendations on percutaneous laser atherectomy with balloon angioplasty (with or without stenting) for peripheral arterial disease (PAD)
This forms a population inversion between the two states. Most excimer lasers are of the noble gas halide type, for which the term excimer is strictly speaking a misnomer (since a dimer refers to a molecule of two identical or similar parts): The correct but less commonly used name for such is exciplex laser. The wavelength of an excimer laser depends on the molecules used, and is usually in the ultraviolet: Excimer lasers, such as XeF and KrF, can also be made tunable using a variety of prism and grating intracavity arrangements. Excimer lasers are usually operated with a pulse rate of around 100 Hz and a pulse duration of ~10 ns, although some operate as high as 8 kHz and 200 ns. For electric discharge pump see: Nitrogen laser. The high-power ultraviolet output of excimer lasers makes them useful for surgery (particularly eye surgery), for lithography for semiconductor manufacturing, and for dermatological treatment. However, when in an excited state (induced by an electrical discharge or ...
Excimer: Ablation on Human Hair The unparalleled precision of the excimer laser makes it uniquely suited to the task of refractive corneal surgery. Each pulse of the laser removes 0.25 microns of tissue. Think of it as slicing 1/200 of a human hair, 1/28 of a red blood cell, or 1/39 millionth of an inch in 4 billionths of a second. This allows the surgeon to literally sculpt the cornea, gently and precisely, into a more desirable shape that allows rays of light to focus properly on the retina.. Myopic Correction. As explained previously, patients with nearsightedness have corneas that are too steep for the length of their eyes. The excimer laser is used to flatten the cornea so that the light rays that pass through it come to a point of focus on the retina, rather than in front of it.. Hyperopic Correction. Patients with hyperopia have corneas that are too flat for the length of their eye. The excimer laser is used to steepen the cornea so that light rays are focused on the retina, rather than ...
A synthetic glass member for use in excimer laser lithography, having superior homogeneity, high transmittance for ArF excimer laser beams and an excellent resistance against lasers is made from high purity synthetic quartz glass, and it is characterized in that layered structures, striae in three directions and internal strains are thermally and mechanically removed, the distribution of refractive index (.DELTA.n) in a plane orthogonal to the optical axis is up to about 1.times.10.sup.-6, the distribution of refractive index (.DELTA.n) in a plane parallel to the optical axis is up to about 5.times.10.sup.-6, the birefringence is up to about 2 nm/cm, the hydrogen molecule concentration is at least about 2.times.10.sup.17 molecules/cm.sup.3, and the internal transmittance is at least about 99.8% at a wavelength of 193.4 nm.
The Swiss Association for Common Tasks of Health Insurance Companies (SVK) is automating its auditing process. To do this, it is using the Sumex solution developed by Suva and Elca. Sumex enables the digitally supplied accounts of its providers to be audited efficiently and accurately.
Highlights: -C-arm angulation increases radiation exposure to operators during complex EVAR -EXCITE ISR results show superiority of laser atherectomy over angioplasty alone -Lutonix becomes first drug-eluting balloon to be approved in USA -Lindsay Machan: Reducing radiation -Ido Weinberg: Social media -Profile: Gunnar Tepe. ...
TITLE l-calcium channel : l-type calcium channel UNITS { (mA) = (milliamp) (mV) = (millivolt) (molar) = (1/liter) (mM) = (millimolar) FARADAY = 96520 (coul) R = 8.3134 (joule/degC) KTOMV = .0853 (mV/degC) } PARAMETER { v (mV) celsius (degC) glcabar (mho/cm2) ki=.001 (mM) cai (mM) cao (mM) tfa=1 } NEURON { SUFFIX lca USEION lca READ elca WRITE ilca VALENCE 2 USEION ca READ cai, cao VALENCE 2 RANGE glcabar, cai, ilca, elca GLOBAL minf,matu } STATE { m } ASSIGNED { ilca (mA/cm2) glca (mho/cm2) minf matu (ms) elca (mV) } INITIAL { rate(v) m = minf VERBATIM cai=_ion_cai; ENDVERBATIM } BREAKPOINT { SOLVE state METHOD cnexp glca = glcabar*m*m*h2(cai) ilca = glca*ghk(v,cai,cao) } FUNCTION h2(cai(mM)) { h2 = ki/(ki+cai) } FUNCTION ghk(v(mV), ci(mM), co(mM)) (mV) { LOCAL nu,f f = KTF(celsius)/2 nu = v/f ghk=-f*(1. - (ci/co)*exp(nu))*efun(nu) } FUNCTION KTF(celsius (DegC)) (mV) { KTF = ((25./293.15)*(celsius + 273.15)) } FUNCTION efun(z) { if (fabs(z) , 1e-4) { efun = 1 - z/2 }else{ efun = z/(exp(z) - 1) } ...
At the New England 2013 Assembly, June 7-9, voters agreed to urge the restraint of hydraulic fracturing and request an eventual divestment of church funds from fossil fuel companies. Read More to see the full story (under FEATURED STORIES) and view the full resolution. ...
The first observation to the authors knowledge of excimer molecules formed by reactive kinetics in a laser-produced plasma is reported. Emission from XeF at 351 nm and a new ionic excimer (XeRb)+ at 165 nm have been observed.. © 1989 Optical Society of America. Full Article , PDF Article ...
கண்புரையை அறுவை சிகிச்சை மூலம் அகற்றுவார்கள். அரை மணி நேர அறுவை சிகிச்சையும் மறு நாளே நிலைமை சரியாகி, ஒரு சில தினங்களில் முற்றாக சாதாரண நிலைக்கு வந்து விடும். Laser-assisted cataract surgery-LASIK surgery ,Extracapsular surgery என சில வேறுபட்ட அறுவை சிகிச்சைகள் இன்று செய்யப்படுகின்றன. ...
TY - JOUR. T1 - Solid-state, pulsed-wave, mid-infrared coronary laser angioplasty in de novo versus restenosis lesions. T2 - Observations from a multicenter study. AU - Topaz, O.. AU - McIvor, M.. AU - De Marchena, Eduardo. PY - 1995/10/1. Y1 - 1995/10/1. N2 - The following is a study of the response of de novo versus restenosis coronary lesions to pulsed-wave, mid-infrared (holmium:YAG) laser assisted angioplasty. De novo lesions contain thrombi, cholesterol, and fibrosis, whereas restenotic lesions are composed of smooth muscle cells corresponding to injury caused by preceding balloon inflations. It is not known whether the different composition affects results of treatment by laser. In a clinical multicenter study, a mid-infrared, solid-state, pulsed-wave laser (holmium:YAG, 2.1 μm wavelength, 250-600 mJ/pulse, 5 Hz) was applied for revascularization of de novo and restenosis coronary lesions. Analysis of data was undertaken to document laser success, complications, and restenosis rate and ...
Excimer laser sources have already been used with success for a number of novel material processing procedures. Most promising of these deal effectively with challenging materials for which little can be done with ordinary tools in order to materialize their potential. In this presentation, attention is focused on excimer irradiation processing of high grade sintered alumina. On one hand, it is shown how effective and unique can be an excimer beam in transforming the surface of this heavily used material. Under specific irradiation conditions, surface melting of sintered alumina is obtained. The resulting material is then studied by low-angle X-ray diffraction which reveals in particular the eventual formation of the uncommon gamma-alumina phase within 10 nm from the material surface. On the other hand, a rather thorough investigation of the phenomenology of the gamma-phase synthesis is presented, stressing various aspects: dynamic, energetic, structural and chemical, all of them stemming from ...
Excimer laser annealing (ELA) of As-, B- and BF2-implanted Si has been studied by secondary ion mass spectrometry (SIMS), spreading resistance probe (SRP) and transmission electron microscopy (TEM). The implantations have been performed in the energy range from I to 30 keV with doses of 10(15)-10(16) cm(-2). ELA has been carried out with the energy densities in the range of 600-1200 mJ/cm(2) and the number of laser pulses from 1 to 10. It is shown that ELA results in a more uniform dopant distribution over the doped region with a more abrupt profile edge as compared to those after rapid thermal annealing (RTA). Besides, in contrast to RTA, ELA demonstrates a highly confined annealing effect, where the distribution of dopants below the melting region is not affected. SRP measurements demonstrate almost complete activation of the implanted dopants after ELA, and TEM does not reveal extended defects in the ELA-treated samples. The depth of the doped layers, abruptness of the profiles and the total ...
Fingerprint Dive into the research topics of Phase field modeling of excimer laser crystallization of thin silicon films on amorphous substrates. Together they form a unique fingerprint. ...
Rotational atherectomy by rotablator. The rotablator pulverize the calcified plaque of atheroma. Here, example of a coronary artery. - Stock Image C002/7142
Biscione, C., Mariano, E., Sergi, D., Tarsia, G., Viceconte, N., Bernardo, V., et al. (2012). Large coronary aneurysm following laser angioplasty of the left anterior descending coronary artery. JOURNAL OF CARDIOVASCULAR MEDICINE, 13(5), 334-335 ...
A semiempirical model of a pulsed, injection-controlled laser is investigated analytically and is applied primarily to extensive experimental results that
The new VYPER/LB750 line beam annealing system enables volume production of low-temperature polysilicon (LTPS) on large generation 6 glass panels. LTP
... angioplasty, balloon MeSH E02.148.050.060.080 - angioplasty, balloon, laser-assisted MeSH E02.148.050.060.100 - angioplasty, ... angioplasty, balloon MeSH E02.148.102.060.080 - angioplasty, balloon, laser-assisted MeSH E02.148.102.060.100 - angioplasty, ... laser MeSH E02.148.050.075.080 - angioplasty, balloon, laser-assisted MeSH E02.148.050.120 - atherectomy MeSH E02.148.050.120. ... assisted MeSH E02.760.952.500 - euthanasia, passive MeSH E02.774.722.435 - hematoporphyrin photoradiation MeSH E02.774.945.500 ...
... angioplasty, laser MeSH E04.416.075.080 - angioplasty, balloon, laser-assisted MeSH E04.416.237 - keratectomy, laser MeSH ... angioplasty MeSH E04.100.814.050.060 - angioplasty, balloon MeSH E04.100.814.050.060.080 - angioplasty, balloon, laser-assisted ... angioplasty, laser MeSH E04.100.814.050.075.080 - angioplasty, balloon, laser-assisted MeSH E04.100.814.050.120 - atherectomy ... laser in situ MeSH E04.416.237.875 - keratectomy, subepithelial, laser-assisted MeSH E04.416.410 - laser coagulation MeSH ...
500,000 balloon angioplasty/stent/coronary procedures; 1M coronary catheterizations Recent successes in acute stroke care are ... Laser sources are coupled into the single scanning fiber and they use red, green, and blue lasers to create color images. To ... and the SFE to assist in wiring the vessel, see the proximal surface of totally occluded vessels and other unique vascular ... Lasers in Surgery and Medicine. 2002;30(3):177-183. [PubMed] [17] Seibel EJ, Smithwick QYJ, Brown CM, Reinhall PG. Single-fiber ...
angioplasty. Giant-cell arteritis. Lymphedema. Vascularized lymph node transfer Lymphaticovenous anastomosis. Suction assisted ... endovenous laser treatment are rapidly replacing major surgery in many first world countries. These newer procedures provide ... Balloon embolectomy Thrombectomy. Vascular bypass grafting. Amputation. Abdominal aortic aneurysm (AAA). Open aortic surgery ... Charles Dotter, who invented angioplasty. Further development of the field has occurred via joint efforts between ...
... balloons and stents. There are also some non-surgical procedures performed such as: catheterization, balloon angioplasty, ... Eye Laser Center Kubati is one of the most complete eye care facilities in Kosovo. Institution was found in 1990 in Prizren and ... Kosovo health care services are now focused on patient's safety, quality control and assisted health. Nowadays, health care ... Eye Laser Center Kubati takes pride in providing quality eye care to its patients. It provides eye care for refractive ...
"Philip K. Katz". Biographies Pioneers of computing A-J. "US Patent 5053090 - Selective laser sintering with assisted powder ... A common use includes angioplasty. In 1963, Dr. Thomas Fogarty invented and patented the balloon catheter. 1963 Geosynchronous ... 1964 Argon laser The argon laser is one of a family of ion lasers that use a noble gas as the active medium. The argon laser ... 1965 Chemical laser A chemical laser is a laser that obtains its energy from a chemical reaction. Chemical lasers can achieve ...
Angioplasty. Bypass/Coronary artery bypass MIDCAB. Off-pump CAB. TECAB. Coronary stent. Bare-metal stent. Drug-eluting stent. * ... Balloon septostomy. creation of septal defect in heart Blalock-Hanlon procedure. shunt from heart chamber to blood vessel. ... Removal in other cases is typically done with a laser or cutting device which threads like a cannula with a cutting edge over ... This type more closely resembles the natural pacing of the heart by assisting the heart in coordinating the function between ...
By equipment used: Laser surgery involves use of a laser for cutting tissue instead of a scalpel or similar surgical ... Angioplasty. Bypass/Coronary artery bypass MIDCAB. Off-pump CAB. TECAB. Coronary stent. Bare-metal stent. Drug-eluting stent. * ... Balloon septostomy. creation of septal defect in heart Blalock-Hanlon procedure. shunt from heart chamber to blood vessel. ... The patient is assisted by an anesthesiologist or resident to make a specific surgical position, then sterile drapes are used ...
500,000 balloon angioplasty/stent/coronary procedures; 1M coronary catheterizations Stroke[edit]. Recent successes in acute ... Laser sources are coupled into the single scanning fiber and they use red, green, and blue lasers to create color images. To ... and the SFE to assist in wiring the vessel, see the proximal surface of totally occluded vessels and other unique vascular ... Lasers in Surgery and Medicine. 2002;30(3):177-183. [PubMed] [17] Seibel EJ, Smithwick QYJ, Brown CM, Reinhall PG. Single-fiber ...
Minimal lumen diameter before excimer laser-assisted balloon angioplasty and balloon angioplasty alone were (mean ± SD) 0.73 ± ... After laser-assisted balloon angioplasty, elastic recoil was 0.84 ± 0.30 mm (32% of balloon size), which was identical to that ... Quantitative angiographic comparison of elastic recoil after coronary excimer laser-assisted balloon angioplasty and balloon ... Quantitative angiographic comparison of elastic recoil after coronary excimer laser-assisted balloon angioplasty and balloon ...
Angioplasty, Balloon, Laser-Assisted*Angioplasty, Balloon, Laser-Assisted. *Laser Balloon Angioplasty. *Angioplasties, Laser ... Balloon, Laser-Assisted" by people in this website by year, and whether "Angioplasty, Balloon, Laser-Assisted" was a major or ... balloon angioplasty immediately following laser angioplasty; or 3, laser energy transmitted through angioplasty balloons that ... Laser-Assisted Balloon. *Balloon Angioplasties, Laser-Assisted. *Balloon Angioplasty, Laser-Assisted. *Laser Assisted Balloon ...
Laser-assisted balloon angioplasty. *Left atrioventricular valve. *Left circumflex artery. *Left Ventricular Ejection Fraction ...
Excimer laser coronary angioplasty (ELCA) is a unique revascularization modality that can vaporize plaque and thrombus. ... When laser angioplasty is performed in combination with balloon angioplasty it is called laser-assisted balloon angioplasty ( ... balloon angioplasty immediately following laser angioplasty; or 3, laser energy transmitted through angioplasty balloons that ... Angioplasty, Balloon, Laser-assisted. Techniques using laser energy in combination with a balloon catheter to perform ...
Thermal laser-assisted balloon angioplasty of the superficial femoral artery: a multicenter review of 602 cases. ...
There are various types of angioplasty. The specific names of these procedures are derived from the type of equipment used and ... Definition Angioplasty is a term describing a procedure used to widen vessels narrowed by stenoses or occlusions. ... Lasers may be used to assist in the break up of the fat or calcium plaque. Catheters may also be equipped with spinning wires ... angioplasty (ăn´jēōplăs´tē), any surgical repair of a blood vessel, especially balloon angioplasty or percutaneous transluminal ...
and laser-assisted balloon dilatation. McKenna M. Nurses will continue to play an important role in the education and care ... Rosborough D. One new approach to this goal is the use of intracoronary stents after balloon angioplasty to maintain the ... and ST segment monitoring after thrombolytic therapy and balloon angioplasty. Baltimore. University of California. Maryland. ... Although lasers have been used in other health disciplines. Smith RB.indexed for MEDLINE] 60. . PMID: 1883592 [PubMed . and ...
This can be done usually using balloon angioplasty (see Figure 1). However, balloon angioplasty can be used only... ... Angioplasty is a method used to open coronary arteries blocked by obstructing plaques. ... Sanborn TA, Faxon DP, Kellert MA, Ryan TJ: Percutaneous coronary excimer laser assisted balloon angioplasty: Initial ... Haase J, Storge H, Hofman M, Schwarz F: Excimer laser angioplasty with adjunctive balloon dilatation versus balloon dilatation ...
Balloon angioplasty. *Cryoplasty. *Diabetic wound solutions. *Embolization. *Hemodialysis access maintenance. *Laser-assisted ...
D) Balloon angioplasty demonstrated a tight focal waist (arrow) at the aortic wall. (E) Laser atherectomy catheter positioned ... Laser-Assisted Transcaval Access for Transcatheter Aortic Valve Replacement. Toby Rogers, Ron Waksman, Michael Slack, Lowell ... Laser-Assisted Transcaval Access for Transcatheter Aortic Valve Replacement. Toby Rogers, Ron Waksman, Michael Slack and Lowell ... Laser-Assisted Transcaval Access for Transcatheter Aortic Valve Replacement Message Subject (Your Name) has forwarded a page to ...
Balloon dilation explanation free. What is Balloon dilation? Meaning of Balloon dilation medical term. What does Balloon ... Looking for online definition of Balloon dilation in the Medical Dictionary? ... by balloon angioplasty.. laser-assisted angioplasty. The use of laser energy to vaporize an atherosclerotic plaque in a ... See Balloon angioplasty, Deferred adjunctive coronary angioplasty, Immediate adjunctive coronary angioplasty, Kissing balloon ...
This study modified an electromyography-assisted optimization approach for predicting lumbar spine loading while walking with ... When laser angioplasty is performed in combination with balloon angioplasty it is called laser-assisted balloon angioplasty ( ... This includes laser thermal angioplasty where the laser energy heats up a metal tip, and direct laser angioplasty where the ... Angioplasty, Laser. A technique utilizing a laser coupled to a catheter which is used in the dilatation of occluded blood ...
In the present study, 48 patients with obstructions of the aortoiliac bifurcation underwent excimer laser-assisted angioplasty ... After excimer laser-assisted recanalization of the common iliac artery obstructions, the aortic bifurcation was reconstructed ... Insall RL, Loose HWC, Chamberlain J. Long-term results of double-balloon percutaneous transluminal angioplasty of the aorta and ... Iliac arteries: reanalysis of results of balloon angioplasty. Radiology. 1993;186:207-212. ...
Results: The initial technical success rate of 90% (36/40) resulted in primary, primary-assisted and secondary-assisted patency ... After successful crossing, balloon dilatation was performed in all cases. Stent implant was required in 10% (4/40) of ... Excimer laser atherectomy after unsuccessful angioplasty of TASC C and D lesions in femoropopliteal arteries. Wissgott C., ... Aim: The study objective was to examine the application of excimer laser atherectomy (ELA) in patients with refractory ...
... by balloon dilation, atherectomy or laser ablation treatment of the artery. For these angioplasty procedures, restenosis occurs ... To assist in the formation of communicating passageways through the polymer between the blood-contacting surface and the lumen- ... Two stents were placed on an angioplasty balloon and were inflated on the balloon. Approximately 80% of the dexamethasone ... A stent so coated was expanded on a 3.5 mm angioplasty balloon causing only a small portion of the coating (less than 25%) to ...
... angioplasty, balloon MeSH E02.148.050.060.080 - angioplasty, balloon, laser-assisted MeSH E02.148.050.060.100 - angioplasty, ... angioplasty, balloon MeSH E02.148.102.060.080 - angioplasty, balloon, laser-assisted MeSH E02.148.102.060.100 - angioplasty, ... laser MeSH E02.148.050.075.080 - angioplasty, balloon, laser-assisted MeSH E02.148.050.120 - atherectomy MeSH E02.148.050.120. ... assisted MeSH E02.760.952.500 - euthanasia, passive MeSH E02.774.722.435 - hematoporphyrin photoradiation MeSH E02.774.945.500 ...
... angioplasty, laser MeSH E04.416.075.080 - angioplasty, balloon, laser-assisted MeSH E04.416.237 - keratectomy, laser MeSH ... angioplasty MeSH E04.100.814.050.060 - angioplasty, balloon MeSH E04.100.814.050.060.080 - angioplasty, balloon, laser-assisted ... angioplasty, laser MeSH E04.100.814.050.075.080 - angioplasty, balloon, laser-assisted MeSH E04.100.814.050.120 - atherectomy ... laser in situ MeSH E04.416.237.875 - keratectomy, subepithelial, laser-assisted MeSH E04.416.410 - laser coagulation MeSH ...
Implications for Laser Balloon Angioplasty-. Together they form a unique fingerprint. * Laser-Assisted Balloon Angioplasty ... keywords = "Carbon monoxide laser, Laser balloon angioplasty, Percutaneous transluminal coronary angioplasty, Restenosis", ... To limit the thickness of the coagulation layer in laser balloon angioplasty, we used a carbon monoxide (CO) laser, which has ... To limit the thickness of the coagulation layer in laser balloon angioplasty, we used a carbon monoxide (CO) laser, which has ...
Endovascular interventional techniques include balloon angioplasty, mechanical removal of clots,32 laser-assisted thrombolysis ...
This device utilizes a pair of cuffs or balloons 60 with a laser probe 12 located between those balloons. U.S. Pat. No. ... Angioplasty method and means for performing angioplasty US5497774A (en) 1993-11-03. 1996-03-12. Daig Corporation. Guiding ... but outside of the second balloon 22. Other components may also be secured to the catheter 12 to assist in the formation of ... By inflating the inner balloon 22, the outer balloon 20 is also inflated. This inner balloon 22 and outer balloon 20 must be ...
... laser and balloon angioplasty devices, vascular and heart devices (tubes, catheters, balloons), ventricular assists, blood ... Hydrophilic Surface Modification of Foley Catheter Tubes and Balloons. Foley catheter tubes and balloons are used for ... Balloons or cuffs on these airway devices are inflated during intubation and are usually made of latex rubber, vinyl or ... In another example of the advantages of this invention, a Foley catheter with a latex balloon is surface modified according to ...
Laser-Assisted Balloon Angioplasty Medicine & Life Sciences * Temperature Medicine & Life Sciences * Technology Medicine & Life ... laser) thermal balloon angioplasty. Radio frequency thermal capabilities were combined with perfusion balloon technology, ... laser) thermal balloon angioplasty. Radio frequency thermal capabilities were combined with perfusion balloon technology, ... laser) thermal balloon angioplasty. Radio frequency thermal capabilities were combined with perfusion balloon technology, ...
PAD undergoing PVI for critical limb ischemia treated either with laser-assisted balloon angioplasty or balloon angioplasty ... METHODS: Using the data from the laser in popliteal and infrapopliteal stenosis study, we retrospectively examined the ... angioplasty) or surgical (endarterectomy, profundaplasty, or bypass) lower limb revascularization for infrainguinal peripheral ...
When laser angioplasty is performed in combination with balloon angioplasty it is called laser-assisted balloon angioplasty ( ... This includes laser thermal angioplasty where the laser energy heats up a metal tip, and direct laser angioplasty where the ... Laser" by people in this website by year, and whether "Angioplasty, Laser" was a major or minor topic of these publications. ... "Angioplasty, Laser" is a descriptor in the National Library of Medicines controlled vocabulary thesaurus, MeSH (Medical ...
... laser assisted angioplasty. De novo lesions contain thrombi, cholesterol, and fibrosis, whereas restenotic lesions are composed ... whereas restenotic lesions are composed of smooth muscle cells corresponding to injury caused by preceding balloon inflations. ... laser assisted angioplasty. De novo lesions contain thrombi, cholesterol, and fibrosis, whereas restenotic lesions are composed ... laser assisted angioplasty. De novo lesions contain thrombi, cholesterol, and fibrosis, whereas restenotic lesions are composed ...
... angioplasties explanation free. What is angioplasties? Meaning of angioplasties medical term. What does angioplasties mean? ... Looking for online definition of angioplasties in the Medical Dictionary? ... by balloon angioplasty.. laser-assisted angioplasty. The use of laser energy to vaporize an atherosclerotic plaque in a ... Related to angioplasties: balloon angioplasty. Angioplasty. Definition. Angioplasty is a term describing a procedure used to ...
... balloon angioplasty and open-heart surgery. They also monitor patients blood pressure and heart rate " /> view more ... They assist in surgery, monitoring the patients heart and respiratory rates…as well as handing instruments and other items to ... Lasers for surgery. Devices for automating insulin injections; all are the work of biomedical engineers " /> view more ... Physical Therapist Aides assist patients receiving treatment by physical therapists. They help disabled patients move to ...
Laser-Assisted Balloon Angioplasty, Laser Balloon Angioplasty, Laser-Assisted Laser Assisted Angioplasty Laser Assisted Balloon ... Laser Balloon Angioplasties Laser Balloon Angioplasty Laser-Assisted Angioplasties Laser-Assisted Angioplasty Laser-Assisted ... Angioplasty, Laser Balloon Angioplasty, Laser-Assisted Angioplasty, Laser-Assisted Balloon Angioplasty, Laser-Assisted, Balloon ... Laser Assisted Angioplasty. Laser Assisted Balloon Angioplasty. Laser Balloon Angioplasties. Laser Balloon Angioplasty. Laser- ...
Angioplasty, Balloon, Laser-Assisted 10. Doença arterial periférica / Peripheral vascular disease Vassoler, Alecxander Augusto ...
Laser-Assisted Balloon Angioplasty * Angiography * Angioscopy * Myocardial Infarction * Radiation Dosimeters * protoporphyrin ...
  • Coronary stenting is performed after angioplasty. (nirujahealthtech.com)
  • UT Southwestern Medical Center's skilled heart experts perform balloon angioplasty and heart stenting to open clogged and blocked heart (coronary) arteries. (utswmed.org)
  • Because UT Southwestern cardiologists are active in heart research and national-level work, we are at the vanguard of the newest technologies and most innovative approaches to angioplasty and cardiac stenting. (utswmed.org)
  • The surgeon provides specific instructions to the patient prior to the balloon angioplasty - and possible stenting - and explains risks such as bleeding, infection, or adverse reaction to anesthesia. (utswmed.org)
  • Among the surgical procedures performed in the U.S. that are projected to experience moderate to robust gains over the forecast period are carotid artery stenting, laparoscopic gastric bypass, percutaneous heart valve repair and replacement, robotic-assisted laparoscopic hysterectomy, robotic prostatectomy, and stem cell transplantation. (gii.co.jp)
  • 5,6 DCB angioplasty has the same limitations as plain balloon angioplasty, specifically acute recoil including undilatable calcified lesions and severe dissections requiring provisional bare metal stenting. (hospitalhealthcare.com)
  • The department of radiology provides imaging services for procedures such as stenting or angioplasty, wherein a catheter is guided into clogged arteries. (manipalhospitals.com)
  • Treatment mainly consists of catheter-directed thrombolysis, angioplasty and stenting and catheter assisted thrombectomy. (manipalhospitals.com)
  • The Interventional Radiology department provides treatment such as AV fistula savage (through angioplasty), central vein angioplasty or stenting, perm catheter placement, peritoneal dialysis (catheter placement). (manipalhospitals.com)
  • Interventional radiology treats such patients using stenting and non-surgical angioplasty. (manipalhospitals.com)
  • Most popular IR procedures include central venous access, angiography, balloon angioplasty, stenting, embolization, and a variety of catheter-based diagnostic and therapeutic tools. (medgadget.com)
  • Interventions Percutaneous transluminal angioplasty (PTA) with bail-out bare metal stenting (assumed to represent the existing standard of care, and 4 alternatives: primary bare metal stents, drug-eluting stents, drug-eluting balloons (DEBs) and biomimetic stents). (bmj.com)
  • Stenting of femoropopliteal arterial obstructive lesions has been demonstrated to result in higher primary patency than standard balloon angioplasty. (vasculardiseasemanagement.com)
  • Indications would include shock following heart attack, complications of balloon angioplasty and stenting, and left ventricular failure. (uwhealth.org)
  • In addition to in-hospital support by an excellent cardiovascular surgical program with extensive advanced surgical capability and experience, we have recently utilized the TandemHeart percutaneous LVAD to assist high-risk balloon angioplasty and stenting. (uwhealth.org)
  • With our pediatric cardiology colleagues, we offer advanced percutaneous therapies to treat adult congenital heart disease, including pulmonary balloon valvuloplasty, pulmonary artery and vein stenting, and embolization of pulmonary arterio-venous malformations. (uwhealth.org)
  • The therapeutic approach to the treatment of aorto-ostial disease has evolved over the years, from balloon angioplasty to debulking therapies with excimer laser or rotational atherectomy to stenting, and in some cases a combination of several of these modalities. (invasivecardiology.com)
  • A series of 57 consecutive coronary lesions successfully treated by xenon chloride excimer laser-assisted balloon angioplasty were individually matched with 57 coronary artery lesions successfully treated by balloon angioplasty alone. (onlinejacc.org)
  • In matched groups of successfully treated coronary lesions, xenon chloride excimer laser ablation did not reduce immediate elastic recoil after adjunctive balloon dilation or improve the final angiographic outcome compared with balloon angioplasty alone using similar-sized balloon catheters. (onlinejacc.org)
  • The following is a study of the response of de novo versus restenosis coronary lesions to pulsed-wave, mid-infrared (holmium:YAG) laser assisted angioplasty. (elsevier.com)
  • De novo lesions contain thrombi, cholesterol, and fibrosis, whereas restenotic lesions are composed of smooth muscle cells corresponding to injury caused by preceding balloon inflations. (elsevier.com)
  • In a clinical multicenter study, a mid-infrared, solid-state, pulsed-wave laser (holmium:YAG, 2.1 μm wavelength, 250-600 mJ/pulse, 5 Hz) was applied for revascularization of de novo and restenosis coronary lesions. (elsevier.com)
  • Laser success was 87 and 86% in these lesions, respectively. (elsevier.com)
  • Restenosis lesions, known to be composed of smooth muscle proliferation, needed more laser energy for ablation than de novo lesions, which contain an atherosclerotic plaque (130 ± 123 pulses vs 109 ± 31, p = 0.001). (elsevier.com)
  • MAIN RESULTS: Primary success was achieved in 29 of 33 lesions (88%) by atherectomy alone and in 31 of 33 lesions (94%) by additional use of balloon angioplasty. (biomedsearch.com)
  • CONCLUSIONS: Directional coronary atherectomy is safe and efficacious for ostial, bulky and eccentric lesions not optimally suited to balloon angioplasty. (biomedsearch.com)
  • Drug-coated balloon (DCB) angioplasty of femoropopliteal TASC II A and B (Trans Atlantic interSociety Consensus conference) lesions has shown promising mid-term results in randomised controlled trials. (hospitalhealthcare.com)
  • Fanelli et al 6 and Tepe et al 5 reported a significant drop in primary patency and increase in late lumen loss following DCB angioplasty of femoropopliteal lesions with circumferential calcification independent of lesion length (Figure 1). (hospitalhealthcare.com)
  • The authors concluded that directional atherectomy and DCB angioplasty may represent a potential alternative strategy for the treatment of femoropopliteal severely calcified lesions. (hospitalhealthcare.com)
  • To evaluate efficacy of the YAG laser in severe occlusive arterial lesions of lower extremity, 64 lesions were considered for either laser recanalisation (LR) or laser assisted balloon angioplasty (LABA). (who.int)
  • Coronary lumen changes during and after excimer laser-assisted balloon angioplasty were measured by quantitative coronary angiography, and the results were compared with the effects of balloon angioplasty alone. (onlinejacc.org)
  • In 3 patients, angiography revealed significant restenoses, which were successfully treated with percutaneous transluminal angioplasty. (ahajournals.org)
  • Laser balloon angioplasty using a CO laser may help to prevent restenosis. (elsevier.com)
  • Analysis of data was undertaken to document laser success, complications, and restenosis rate and to define whether the type of lesion treated had an effect on laser success and related complications. (elsevier.com)
  • We report the use of excimer-laser angioplasty for the treatment of Wiktor and Gianturco-Roubin in-stent restenosis of in two patients. (bvsalud.org)
  • Therefore, the procedure was an effective means of treating restenosis after coronary stent placement, and a prospective comparison of excimer-laser angioplasty and other management alternatives to in-stent restenosis is needed. (bvsalud.org)
  • 7-9 Even less is known with regard to vessel preparation for femoropopliteal instent restenosis, in particular in-stent reocclusions, which have been shown to be at high risk for developing recurrent instent restenosis or reocclusion following plain balloon angioplasty, cutting balloon angioplasty and even DCB angioplasty. (hospitalhealthcare.com)
  • The investigator initiated DEFINITVE AR (Directional AthErectomy Followed by a PaclItaxel-Coated BallooN to InhibiT RestenosIs and maintain Vessel PatEncy: A Pilot Study of Anti-Restenosis Treatment) trial to assess and estimate the effect of treating a vessel with directional atherectomy followed by DCB angioplasty compared with treatment with DCB alone. (hospitalhealthcare.com)
  • I have chosen to comment on Deepika Kalisetta and colleagues case report on Balloon Assisted Dislodgement of a Trapped Directional Atherectomy Catheter (the Ocelot device) During Treatment of In-Stent Restenosis (ISR). (vasculardiseasemanagement.com)
  • However, at 1 year, restenosis rates were better than PTA but remained suboptimal with 308 nm excimer laser and PTA alone. (vasculardiseasemanagement.com)
  • Unfortunately, abrupt reclosure occurs in 3-5 % of the cases in which the balloon angioplasty is used and gradual restenosis of the artery occurs in 17-34% of the cases. (eduladder.com)
  • Angioplasty is a term describing a procedure used to widen vessels narrowed by stenoses or occlusions. (encyclopedia.com)
  • Angioplasties performed by vascular surgeons are done in an operating room or specially designed vascular procedure suite. (encyclopedia.com)
  • Typically, patients are given anticoagulant (blood thinning) medications prior to the procedure to assist in the prevention of thromboses (blood clots), even though these drugs may slow down the sealing of the entry point into the vein. (encyclopedia.com)
  • Typically, patients are given anticoagulants prior to the procedure to assist in the prevention of thromboses ( blood clots ). (thefreedictionary.com)
  • If performed by a vascular surgeon, the angioplasty procedure will be performed in an operating room or specially designed vascular procedure suite. (thefreedictionary.com)
  • The purposes of this study were to evaluate the clinical, hemodynamic, and angiographic changes after stent-supported reconstruction of the aortic bifurcation with the kissing balloon technique and to assess the long-term results of this procedure. (ahajournals.org)
  • With the mid-infrared, pulsed-wave, holmium:YAG laser, the composition of the target lesion affects the energy level required, as well as the procedure-related complications. (elsevier.com)
  • In selected patients with a well developed tripartite RV, the radiofrequency assisted valvotomy procedure has been shown to be more efficacious in decompressing the RV and associated with lower morbidity than closed surgical valvotomy and Blalock-Taussig shunt insertion. (bmj.com)
  • Balloon angioplasty is a minimally invasive cardiac catheterization procedure used to open narrow and blocked arteries. (utswmed.org)
  • Started in Malaysia in 2001, sweaty palms, armpits and even face can be permanently treated by a procedure known as video-assisted thoracoscopic sympathetomy. (whatclinic.com)
  • Instead of using laser treatment, iHEAL uses less invasive procedure in which two 5mm incisions are made on each side of the chest and a titanium clip will be placed on the sympathetic nervous system. (whatclinic.com)
  • Another type of atherectomy procedure uses a laser, which opens the artery by "vaporizing" the plaque. (nyhq.org)
  • With this procedure, a balloon-tipped catheter is used to expand a narrowing in the blood vessel to increase blood flow. (providence.org)
  • Safety and quality are carefully monitored by a panel of physicians who review every angioplasty procedure done in our hospital. (thehearthospitalbaylor.com)
  • Credentialed as a Center of Excellence in Excimer Laser Ablation Therapy, the department employs "cool" laser ablation, a minimally invasive procedure that removes blockages. (stvhs.com)
  • UW Health Heart and Vascular Care performed Wisconsin's first FDA-approved TandemHeart percutaneous left ventricular assist device (LVAD) procedure in January 2004. (uwhealth.org)
  • Compared to other surgical procedure, balloon angioplasty is relatively simple. (eduladder.com)
  • If a percutaneous transluminal coronary angioplasty (PTCA) is to be performed, the patient is sedated so that he or she can report discomfort and cough if asked to do so. (encyclopedia.com)
  • If a percutaneous transluminal coronary angioplasty (PTCA) is to be performed, the patient will be kept awake to report on discomfort and cough if required. (thefreedictionary.com)
  • What is percutaneous transluminal coronary angioplasty (PTCA)? (nyhq.org)
  • Percutaneous transluminal coronary angioplasty (PTCA) is performed to open blocked coronary arteries caused by coronary artery disease (CAD) and to restore arterial blood flow to the heart tissue without open-heart surgery. (nyhq.org)
  • PCI is also called percutaneous transluminal coronary angioplasty (PTCA). (providence.org)
  • This multicenter case control study assessed angiographic and clinical outcomes of 137 consecutive procedures in 125 patients treated for ISR with either PTCA alone (n=58) or excimer laser assisted coronary angioplasty (ELCA, n=67). (yyu.edu.tr)
  • In an industry sector influenced by ongoing technological change, particularly in percutaneous transluminal coronary angioplasty (PTCA), design engineers wrestle with new concepts and approaches through trial and error. (mddionline.com)
  • Srihari S. Naidu, MD, is skilled in all aspects of interventional cardiology, including atrial septal defect and patent foramen ovale closure, alcohol septal ablation for hypertrophic cardiomyopathy,aortic and mitral valvuloplasty and percutaneous ventricular assist devices, as well as peripheral and coronary intervention. (winthrop.org)
  • In the case of an angioplasty involving the coronary arteries, the point of entry might be the femoral artery in the groin, with the catheter/guidewire system passed through the aorta to the heart and the origin of the coronary arteries at the base of the aorta just outside the aortic valve. (encyclopedia.com)
  • Angioplasty is a method used to open coronary arteries blocked by obstructing plaques. (springer.com)
  • Aim: The study objective was to examine the application of excimer laser atherectomy (ELA) in patients with refractory occlusions in femoropopliteal arteries, where the initial conventional percutaneous transluminal angioplasty (PTA) recanalization attempts, were unsuccessful. (minervamedica.it)
  • To avoid these complications, the "kissing balloon technique" was developed for bilateral simultaneous angioplasty of the common iliac arteries. (ahajournals.org)
  • A comparison of excimer laser, thermal probe, and mechanical devices for recanalizing occluded human arteries. (escholarship.org)
  • These results indicate that although the eximer laser could recanalize human atherosclerotic arteries without thermal injury, the fiber frequently deflected around firm atherosclerotic plaque and advanced in a dissection plane between the plaque and media. (escholarship.org)
  • So, individuals who have a blockage in the arteries and experience chest discomfort require Coronary Angioplasty. (nirujahealthtech.com)
  • Balloon angioplasty and heart stent implantation are typically offered to patients with narrow or blocked arteries for whom medication has been unsuccessful and/or who have suffered a heart attack that does not require cardiac bypass surgery . (utswmed.org)
  • The use of fluoroscopy (a special type of X-ray, similar to an X-ray "movie") assists the doctor in the location of blockages in the coronary arteries as the contrast dye moves through the arteries. (nyhq.org)
  • 5 Vessel preparation with debulking devices or plaque modulation devices might improve acute and longer-term technical outcomes of DCB angioplasty in native femoropopliteal arteries as suggested in small single-centre studies. (hospitalhealthcare.com)
  • Although angioplasty is done in other blood vessels elsewhere in the body, percutaneous coronary intervention (PCI) refers to angioplasty in the coronary arteries to let more blood flow into the heart. (providence.org)
  • A Special Catheter with a collapsed narrow inflatable balloon is inserted into a vein through an incision in the neck or leg and fed through blood vessels until it reaches the diseased arteries of the heart. (eduladder.com)
  • In both treatment groups, similar-sized balloon catheters (2.59 ± 0.35 and 2.56 ± 0.40 mm, respectively) were used. (onlinejacc.org)
  • Comparison of 0.9-mm and 1.4-mm catheters in excimer laser coronary angioplasty for acute myocardial infarction. (bioportfolio.com)
  • Excimer laser catheters come in various sizes, and we sought to compare the 0.9- and 1.4-mm-diameter catheters. (bioportfolio.com)
  • Angioplasties were originally performed by dilating the blood vessel with the introduction of larger and larger stiff catheters through the narrowed space. (encyclopedia.com)
  • As of 2003, the catheters used to perform angioplasties contain balloons that are inflated to widen the vessel, and stents (thin collapsed tubes made of wire mesh) to provide structural support for the vessel. (encyclopedia.com)
  • Today, catheters contain balloons that are inflated to widen the vessel and stents to provide structural support for the vessel. (thefreedictionary.com)
  • The only PMA approved excimer laser system and disposable catheters for the treatment of peripheral and coronary arterial disease. (philips.cz)
  • The CVX-300 excimer laser system facilitates photoablation via a variety of Philips laser catheters to remove binding arterial plaques. (philips.cz)
  • Magnum wire), drills of various velocities, laser energy applied directly to the tissue (some angioscopically guided, some triggered by on-line spectral tissue analysis), catheters dispersing laser energy through a sapphire or converting it into heat (hot tip), and electrical or radiofrequency heat applicators. (biomedsearch.com)
  • Balloon catheters are divided into fixed-wire, over-the-wire, and monorail designs. (mddionline.com)
  • After excimer laser-assisted recanalization of the common iliac artery obstructions, the aortic bifurcation was reconstructed with the bilateral simultaneous implantation of Palmaz stents (diameter, 7 to 8 mm). (ahajournals.org)
  • The use of IVUS provides direct visualization and measurement of the inside of the blood vessels and may assist the doctor in selecting the appropriate size of balloons and/or stents, to ensure that a stent, if used, is properly opened, or to evaluate the use of other angioplasty instruments. (nyhq.org)
  • Under his leadership, NYU Winthrop's Cardiac Catheterization Laboratory has developed a regional and national reputation for excellent patient outcomes and for pioneering the latest technologies and techniques on Long Island, including the first implantations of the Xience and Endeavor drug-eluting stents and the first placement of the Impella ventricular assist device for high-risk angioplasty. (winthrop.org)
  • This study is the first cost-effectiveness analysis to consider the four most promising alternatives to standard endovascular care for superficial femoral arterial disease: bare metal stents, drug-eluting stents, drug-eluting balloons (DEBs) and biomimetic stents. (bmj.com)
  • There are presently 3 modalities that are approved by the US Food and Drug Administration (FDA) and have been demonstrated to be superior to plain balloon angioplasty in treating ISR. (vasculardiseasemanagement.com)
  • We here report the first case, using Bridge Occlusion Ballon for a venous angioplasty in a patient with dysfunctional pacemaker leads and symptomatic Superior Vena Cava occlusion. (bvsalud.org)
  • Therefore, venous angioplasty using the Bridge balloon was performed. (bvsalud.org)
  • Excimer-laser angioplasty within the stent reduced the stenosis to 19and 30, respectively. (bvsalud.org)
  • Reduction of atherosclerotic tissue mass by laser ablation in the treatment of coronary artery disease may be more effective in enlarging the lumen than balloon angioplasty alone. (onlinejacc.org)
  • In balloon angioplasty, plaque is pushed out of the clogged artery by the inflation of the balloon device. (thefreedictionary.com)
  • Percutaneous transluminal angioplasty (PTA) has proved to be an effective technique for the treatment of focal iliac artery stenoses. (ahajournals.org)
  • Angioplasty - A tiny balloon on the end of a catheter is inflated to push plaque against the wall of the artery to improve blood flow. (porterhealth.com)
  • A specially designed catheter along with a small balloon is guided through the blocked artery. (nirujahealthtech.com)
  • A thin, flexible catheter with a laser attached to its tip is inserted into an artery. (nirujahealthtech.com)
  • In balloon angioplasty, the cardiologist makes a tiny incision in the groin or wrist to access the femoral artery and inserts a thin, flexible tube (catheter) with a tiny deflated balloon or other device at its tip. (utswmed.org)
  • The cardiologist guides the catheter to the site of the narrowed or blocked artery and inflates the balloon, which compresses the plaque against the artery wall and helps restore blood flow. (utswmed.org)
  • If the doctor decides that a heart stent will help prevent the spot in the artery from closing or re-closing, the balloon catheter is removed and a stent is placed in the area where the angioplasty was performed. (utswmed.org)
  • The balloon is inflated once the catheter has been placed into the narrowed area of the coronary artery. (nyhq.org)
  • The inflation of the balloon compresses the fatty tissue in the artery and makes a larger opening inside the artery for improved blood flow. (nyhq.org)
  • A small balloon is inflated inside the blocked artery to re-establish blood flow. (providence.org)
  • A laser is used to help "vaporize" the blockage in the artery. (providence.org)
  • Should blood flow be diminished, new interventional procedures such as balloon and laser assisted angioplasty have been developed to repair an occluded or stenosed artery. (kzoo.edu)
  • The affiliated heart specialists utilize advanced technology to assist in providing fast, accurate diagnosis and treatment of coronary artery disease, close to home. (memorialhermann.org)
  • A small balloon accompanies the catheter to open the artery, thereby allowing blood flow to occur. (manipalhospitals.com)
  • PAD laser therapy is available at St. Vincent's East Cardiovascular Department, which is a national training center for the treatment of Peripheral Artery Disease (PAD). (stvhs.com)
  • We offer balloon and laser angioplasty, the breaking down of blood clots by delivering a specific enzyme into the artery, surgical bypass when appropriate, as well as wound care. (uwhealth.org)
  • Shangguan H.Q, Gregory K.W., Casperson L.W. and Prahl S.A, "Enhanced Laser Thrombolysis with Photomechanical Drug Delivery: An In Vitro Study", Lasers Surg Med . (springer.com)
  • Technologists are trained to prepare patients, and assist physicians during procedures such as cardiac catheterization, and open-heart surgery, balloon angioplasty and open-heart surgery. (gadball.com)
  • Positioned as a cardiac health centre, iHEAL focuses on the diagnostic and detection of heart diseases and offers a complete range of treatment options which includes angioplasty and bypass. (whatclinic.com)
  • This small centrifugal pump can deliver 3.5 to 4.0 liters per minute of assisted cardiac output. (uwhealth.org)
  • Balloon angioplasty ( or Percutaneous Transluminal Coronary Angioplasty) has become one of the most commonly performed major cardiac operations in the United States. (eduladder.com)
  • We retrospectively enrolled 90 acute myocardial infarction (AMI) patients who underwent primary percutaneous coronary intervention with excimer laser from August 2013 to March 2017 in our hospital. (bioportfolio.com)
  • The following variables were measured by quantitative coronary analysis: 1) ablation by laser, 2) stretch by balloon dilation, 3) elastic recoil, and 4) acute gain. (onlinejacc.org)
  • Laser ablation significantly improved minimal lumen diameter by 0.56 ± 0.44 mm before adjunctive balloon dilation. (onlinejacc.org)
  • To report the outcomes of laser in situ keratomileusis (LASIK) for hyperopia using the Triple-A ablation profile with the MEL 90 excimer laser (Carl Zeiss Meditec, Jena, Germany). (bioportfolio.com)
  • Excimer laser coronary angioplasty (ELCA) is a unique revascularization modality that can vaporize plaque and thrombus. (bioportfolio.com)
  • Conflicting results exist on the therapeutic effects of percutaneous myocardial laser revascularization (PMR) in patients with refractory angina pectoris. (bvsalud.org)
  • To investigate the effects of traditional transmyocardial laser revascularization (T-TMLR) and non-transmural myocardial laser revascularization (N-TMLR) on myocardial ischemic and necrotic areas and angiogenesis. (bvsalud.org)
  • Methods and Results -In 48 patients with obstructions of the aortoiliac segment, primary stent implantation was performed with the "kissing balloon technique. (ahajournals.org)
  • Conclusions -Primary stent implantation with the kissing balloon technique is safe and effective for the treatment of aortoiliac obstructions involving the aortic bifurcation and represents a true endovascular alternative to surgery. (ahajournals.org)
  • Lasers may be used to help break up the plaque or fat deposits. (encyclopedia.com)
  • However, balloon angioplasty can be used only if there is an adequate opening that allows passages of the balloon inside the plaque. (springer.com)
  • A laser can also be used to break up the plaque. (porterhealth.com)
  • Beneficial welding effects have been obtained for tissue temperature between 95 135  C. Although these previous studies have used laser radiation to deliver power to plaque, it is concluded that welding is primarily a thermal process dependent in maintaining an elevated temperature level. (eduladder.com)
  • The challenge of microwave assisted balloon angioplasty (MABA) is to sufficiently heat the plaque layer without over heating the surrounding vessel wall. (eduladder.com)
  • The purpose of this study is to compare LASIK outcomes using the WaveLight ALLEGRETTO WAVE™ wavefront guided or optimized excimer laser treatment with the AMO/VISX CustomVue™ and the L. (bioportfolio.com)
  • Angioplasty and stent placement are required to be monitored for any complications. (nirujahealthtech.com)
  • For some patients, thrombolytic therapy (treatment with drugs that dissolve blood clots) is an alternative to angioplasty. (encyclopedia.com)
  • Many medical centers, in fact, restrict the use of angioplasty to patients who cannot be treated with thrombolytic therapy. (encyclopedia.com)
  • Wound-healing effects of 635-nm low-level laser therapy on primary human vocal fold epithelial cells: an in vitro study. (bioportfolio.com)
  • Free gingival graft adjunct with low-level laser therapy: a randomized placebo-controlled parallel group study. (bioportfolio.com)
  • This study aimed to evaluate the effect of low-level laser therapy (LLLT) in terms of enhancing wound healing, reducing free gingival graft (FGG) shrinkage and postoperative pain. (bioportfolio.com)
  • Effects of Laser Photobiomodulation and Ozone Therapy on Palatal Epithelial Wound Healing and Patient Morbidity. (bioportfolio.com)
  • The aim of this study was to compare the effects of laser photobiomodulation (PBM) and topical ozone therapy on the reepithelialization of palatal donor site wounds through clinical assessment and com. (bioportfolio.com)
  • Low-level laser therapy (also known as photobiomodulation therapy, PBMT) promotes accelerated healing of diabetic foot ulcers (DFUs), thereby preventing the risk of future complications and amputation. (bioportfolio.com)
  • The purpose of this study is to examine whether or not Low Level Laser Therapy (LLLT) can reduce pain and/or improve wound healing in patients with an acute traumatic injury to the upper e. (bioportfolio.com)
  • To limit the thickness of the coagulation layer in laser balloon angioplasty, we used a carbon monoxide (CO) laser, which has high tissue absorption, as a therapy laser source instead of a Nd: YAG laser. (elsevier.com)
  • IMSEAR at SEARO: YAG laser angioplasty in lower extremity: sole therapy as well as adjunct to balloon dilatation. (who.int)
  • The third FDA-approved therapy for treating ISR was the drug-coated balloon (DCB). (vasculardiseasemanagement.com)
  • Tell me about the latest advances in endovascular laser therapy for varicose veins.There have been 2 major advances in endovascular laser therapy for varicose veins. (vasculardiseasemanagement.com)
  • This includes laser thermal angioplasty where the laser energy heats up a metal tip, and direct laser angioplasty where the laser energy directly ablates the occlusion. (ucdenver.edu)
  • Abstract The Bridge Occlusion Balloon is a compliant balloon, specifically designed for temporary Superior vena cava occlusion in case of Superior Vena Cava laceration during lead extraction procedures. (bvsalud.org)
  • Especially for high-risk lead extraction cases in patients with Superior Vena Cava stenosis, the Bridge Occlusion Ballon might be used as a combination of a safety-net in case of Superior Vena Cava perforation and for Superior Vena Cava angioplasty. (bvsalud.org)
  • A chronic total occlusion lasting 9.5 years, was successfully treated with a Prima (TN) Laser catheter, of Spectranectics. (bvsalud.org)
  • An occlusion flush at the orifice of the vessel, tapering into a small sidebranch, with bridging collaterals, or devoid of collaterals is no target for angioplasty. (biomedsearch.com)
  • A technique utilizing a laser coupled to a catheter which is used in the dilatation of occluded blood vessels. (bioportfolio.com)
  • Dilatation of the aortic wall revealed a tight focal waist on a 2.5-mm noncompliant balloon inflated to 28 atm ( Figure 1D ), and the microcatheter still would not cross. (onlinejacc.org)
  • After successful crossing, balloon dilatation was performed in all cases. (minervamedica.it)
  • Credited with the inspiration for the development of the SciMed Rebel angioplasty balloon dilatation system. (s9.com)
  • Addition of balloon dilatation to LR decreased the requirement of additional by-pass surgery from 6/16 (60%) to 2/30 (7%) (p less than 0.05). (who.int)
  • Addition of balloon dilatation to LR had improved the results. (who.int)
  • First introduced in the late 1970s, his device was a double-lumen dilatation catheter with an inflatable, nondistensible oblong balloon that would inflate to a predetermined diameter. (mddionline.com)
  • 13 The role of Mönckeberg medial calcification - a common manifestation in patients with diabetes and end-stage renal insufficiency 14 - on the biological efficacy of drug-coated balloons is still unknown. (hospitalhealthcare.com)
  • (D) Balloon angioplasty demonstrated a tight focal waist (arrow) at the aortic wall. (onlinejacc.org)
  • (E) Laser atherectomy catheter positioned against the aortic wall (arrow) ( Online Video 2 ). (onlinejacc.org)
  • Excimer Laser preparation of the calcified aortic wall. (onlinejacc.org)
  • Further preparation of the aortic wall was performed using a 0.9-mm X-80 Excimer Laser Coronary Atherectomy catheter (Spectranetics, Colorado Springs, Colorado) with 6 passes at high power (80 mJ/mm 2 ) and high repletion rate (80 Hz) ( Figure 1E , Online Video 2 ), following which the telescoping catheter system was successfully advanced into the aorta. (onlinejacc.org)
  • During his fellowship Dr. Roger Coletti was involved in research in CPR, coronary blood flow and the use of Intra Aortic Balloon Pump (IABP) support of failing hearts. (s9.com)
  • He assisted in the design of the Datascope Intra-aortic Balloon Pump percutaneous self prolapsing miniaturized wire in autopsy studies. (s9.com)
  • The device consists of a thin, flexible tube (a catheter) with a long balloon at its tip (intra-aortic balloon, or IAB). (providence.org)
  • After the unsuccessful attempt, an excimer laser catheter (catheter diameters from 1.7-2.5 mm) was used for recanalization using the step-by-step method of crossing. (minervamedica.it)
  • Recent developments using angiogenic growth factors appear very promising, and the role of growth factors as an adjunct to percutaneous transmyocardial revascularisation with laser remains to be seen. (bvsalud.org)
  • Deckelbaum L.I., "Cardiovascular Application of Laser Technology", in Laser Surgery andMedicine - Principles and Practice , Ed. Puliafito C.A., 1996. (springer.com)
  • Lasers for surgery. (gadball.com)
  • This holds true for balloon angioplasty as well as for surgery. (biomedsearch.com)
  • It is innocuous but produces symptoms prompting further interventions (repeat angioplasty or bypass surgery). (biomedsearch.com)
  • Constant technological advancements in computer-assisted visualization and robot-assisted surgery are anticipated to positively impact the IR market. (medgadget.com)
  • Our cancer surgery specialists use computer-assisted surgery systems for a variety of types of cancer including gynecologic, cardiothoracic, and urologic. (spartanburgregional.com)
  • We also have video-assisted technology for chest surgery (video-assisted thoracic surgery, or VATS) to provide our surgeons and patients with the greatest number of options for care and treatment. (spartanburgregional.com)
  • However, the surgery can also be done through several small incisions using robotically-assisted surgical tools. (spartanburgregional.com)
  • Indications for angioplasty are based on an estimate of technical difficulties and clinical risks balanced against potential subjective benefit and amount of viable myocardium concerned. (biomedsearch.com)
  • These results suggest that intermittent laser irradiation with a CO laser can be used to limit the depth of thermal coagulation, and can selectively weld the intima without excessive thermal damage. (elsevier.com)
  • The goal of this study was to develop and test a new radio frequency thermal balloon system to allow longer balloon inflations at lower temperature levels than have been used with standard (laser) thermal balloon angioplasty. (elsevier.com)
  • Radio frequency thermal capabilities were combined with perfusion balloon technology, creating a thermal-perfusion balloon catheter system for prolonged thermal inflations. (elsevier.com)
  • Twenty-five dogs underwent thermal-perfusion angioplasty at 37°, 60°, or 80° C for 1.5, 5, or 15 minutes with angiographic and morphologic assessments at 24 hours (n = 17) or 4-6 weeks later (n = 8). (elsevier.com)
  • Thus the thermal-perfusion balloon angioplasty system may be safely applied in canine technologies provides prolonged treatment duration at moderate temperatures without excessive tissue damage. (elsevier.com)
  • One form of the latter approach uses an EXCIMER LASER which creates microscopically precise cuts without thermal injury. (ucdenver.edu)
  • The incidence of perforation in vitro was less with an excimer laser catherter (8/21 or 38%) than with the thermal prove (10/11 or 91%) (p less than 0.01). (escholarship.org)
  • This study showed that efficacy of 0.9 and 1.4 mm excimer laser catheter was equivalent in ELCA for AMI patients. (bioportfolio.com)
  • platelets phenomenon, the 0.9 mm excimer laser catheter is sufficient for ELCA in AMI patients. (bioportfolio.com)
  • The objectives of this study are to observe and examine prospectively whether excimer laser coronary angioplasty (ELCA) and percutaneous coronary intervention with biodegradable-polymer pl. (bioportfolio.com)
  • To investigate the benefit of short-penetration CO laser light to vascular tissue, excised human abdominal aorta was irradiated with a CO laser through a 30 μm polyethylene membrane. (elsevier.com)
  • For example, percutaneous transluminal angioplasty (PTA) means that the vessel is entered through the skin (percutaneous) and that the catheter is moved into the blood vessel of interest through the same vessel or one that communicates with it (transluminal). (encyclopedia.com)
  • For example, percutaneous transluminal angioplasty (PTA) describes entry through the skin (percutaneous) and navigates to the area of the vessel of interest through the same vessel or one that communicates with it (transluminal). (thefreedictionary.com)
  • Historically, percutaneous transluminal angioplasty (PTA) has been the main form of treatment for PAD. (bmj.com)
  • The first modality to gain FDA approval for treating ISR was the 308 nm excimer laser followed by percutaneous transluminal angioplasty (PTA). (vasculardiseasemanagement.com)
  • Since the decision to perform angioplasty may have been made following a diagnostic angiogram, the patient's sensitivity to iodinated contrast media is likely to be known. (encyclopedia.com)
  • Laser angioplasty lasts usually between 30 minutes to 3 hours depending upon the blockage and complications. (nirujahealthtech.com)
  • A subsequent single-center randomized trial by Gandini demonstrated that laser atherectomy followed by DCB was associated with better patency and limb salvage than DCB alone. (vasculardiseasemanagement.com)
  • Thulium fiber laser is designed for stone lithotripsy and soft tissue applications. (mpo-mag.com)
  • Angioplasty procedures are performed on hospital inpatients in facilities for proper monitoring and recovery. (thefreedictionary.com)