Stents. Medical search

Devices that provide support for tubular structures that are being anastomosed or for body cavities during skin grafting.

Stents that are covered with materials that are embedded with chemicals that are gradually released into the surrounding milieu.

Recurrent narrowing or constriction of a coronary artery following surgical procedures performed to alleviate a prior obstruction.

A macrolide compound obtained from Streptomyces hygroscopicus that acts by selectively blocking the transcriptional activation of cytokines thereby inhibiting cytokine production. It is bioactive only when bound to IMMUNOPHILINS. Sirolimus is a potent immunosuppressant and possesses both antifungal and antineoplastic properties.

Dilation of an occluded coronary artery (or arteries) by means of a balloon catheter to restore myocardial blood supply.

The plan and delineation of prostheses in general or a specific prosthesis.

Electropositive chemical elements characterized by ductility, malleability, luster, and conductance of heat and electricity. They can replace the hydrogen of an acid and form bases with hydroxyl radicals. (Grant & Hackh's Chemical Dictionary, 5th ed)

A mixture of metallic elements or compounds with other metallic or metalloid elements in varying proportions.

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 cyclodecane isolated from the bark of the Pacific yew tree, TAXUS BREVIFOLIA. It stabilizes MICROTUBULES in their polymerized form leading to cell death.

Coagulation of blood in any of the CORONARY VESSELS. The presence of a blood clot (THROMBUS) often leads to MYOCARDIAL INFARCTION.

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.

Agents that affect the rate or intensity of cardiac contraction, blood vessel diameter, or blood volume.

Radiography of the vascular system of the heart muscle after injection of a contrast medium.

Narrowing or constriction of a coronary artery.

Pathological processes of CORONARY ARTERIES that may derive from a congenital abnormality, atherosclerotic, or non-atherosclerotic cause.

Implants constructed of materials designed to be absorbed by the body without producing an immune response. They are usually composed of plastics and are frequently used in orthopedics and orthodontics.

The veins and arteries of the HEART.

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.

Formation and development of a thrombus or blood clot in the blood vessel.

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.

Obstruction of flow in biological or prosthetic vascular grafts.

Stainless steel. A steel containing Ni, Cr, or both. It does not tarnish on exposure and is used in corrosive environments. (Grant & Hack's Chemical Dictionary, 5th ed)

Small containers or pellets of a solid drug implanted in the body to achieve sustained release of the drug.

Agents that interact with TUBULIN to inhibit or promote polymerization of MICROTUBULES.

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.

The condition of an anatomical structure's being constricted beyond normal dimensions.

NECROSIS of the MYOCARDIUM caused by an obstruction of the blood supply to the heart (CORONARY CIRCULATION).

Agents that suppress immune function by one of several mechanisms of action. Classical cytotoxic immunosuppressants act by inhibiting DNA synthesis. Others may act through activation of T-CELLS or by inhibiting the activation of HELPER CELLS. While immunosuppression has been brought about in the past primarily to prevent rejection of transplanted organs, new applications involving mediation of the effects of INTERLEUKINS and other CYTOKINES are emerging.

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.

Either of two large arteries originating from the abdominal aorta; they supply blood to the pelvis, abdominal wall and legs.

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 innermost layer of an artery or vein, made up of one layer of endothelial cells and supported by an internal elastic lamina.

A family of percutaneous techniques that are used to manage CORONARY OCCLUSION, including standard balloon angioplasty (PERCUTANEOUS TRANSLUMINAL CORONARY ANGIOPLASTY), the placement of intracoronary STENTS, and atheroablative technologies (e.g., ATHERECTOMY; ENDARTERECTOMY; THROMBECTOMY; PERCUTANEOUS TRANSLUMINAL LASER ANGIOPLASTY). PTCA was the dominant form of PCI, before the widespread use of stenting.

Specific alloys not less than 85% chromium and nickel or cobalt, with traces of either nickel or cobalt, molybdenum, and other substances. They are used in partial dentures, orthopedic implants, etc.

Compounds formed by the joining of smaller, usually repeating, units linked by covalent bonds. These compounds often form large macromolecules (e.g., BIOPOLYMERS; PLASTICS).

Elements of limited time intervals, contributing to particular results or situations.

Methods of creating machines and devices.

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.

Device constructed of either synthetic or biological material that is used for the repair of injured or diseased blood vessels.

Surgical insertion of BLOOD VESSEL PROSTHESES to repair injured or diseased blood vessels.

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.

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.

The degree to which BLOOD VESSELS are not blocked or obstructed.

The systems and processes involved in the establishment, support, management, and operation of registers, e.g., disease registers.

The restoration of blood supply to the myocardium. (From Dorland, 28th ed)

A stricture of the ESOPHAGUS. Most are acquired but can be congenital.

The return of a sign, symptom, or disease after a remission.

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.

Systems for the delivery of drugs to target sites of pharmacological actions. Technologies employed include those concerning drug preparation, route of administration, site targeting, metabolism, and toxicity.

Malfunction of implantation shunts, valves, etc., and prosthesis loosening, migration, and breaking.

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.

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.

An effective inhibitor of platelet aggregation commonly used in the placement of STENTS in CORONARY ARTERIES.

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.

A nonparametric method of compiling LIFE TABLES or survival tables. It combines calculated probabilities of survival and estimates to allow for observations occurring beyond a measurement threshold, which are assumed to occur randomly. Time intervals are defined as ending each time an event occurs and are therefore unequal. (From Last, A Dictionary of Epidemiology, 1995)

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.

Migration of a foreign body from its original location to some other location in the body.

Polymeric materials (usually organic) of large molecular weight which can be shaped by flow. Plastic usually refers to the final product with fillers, plasticizers, pigments, and stabilizers included (versus the resin, the homogeneous polymeric starting material). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)

Surgical insertion of a prosthesis.

Failure of equipment to perform to standard. The failure may be due to defects or improper use.

Complete blockage of blood flow through one of the CORONARY ARTERIES, usually from CORONARY ATHEROSCLEROSIS.

Works about clinical trials that involve at least one test treatment and one control treatment, concurrent enrollment and follow-up of the test- and control-treated groups, and in which the treatments to be administered are selected by a random process, such as the use of a random-numbers table.

Care alleviating symptoms without curing the underlying disease. (Stedman, 25th ed)

The hindering of output from the STOMACH into the SMALL INTESTINE. This obstruction may be of mechanical or functional origin such as EDEMA from PEPTIC ULCER; NEOPLASMS; FOREIGN BODIES; or AGING.

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).

Removal of an implanted therapeutic or prosthetic device.

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 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)

The main artery of the thigh, a continuation of the external iliac artery.

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.

Genetically developed small pigs for use in biomedical research. There are several strains - Yucatan miniature, Sinclair miniature, and Minnesota miniature.

Radiography of blood vessels after injection of a contrast medium.

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.

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.

Chronic inflammation and granuloma formation around irritating foreign bodies.

Introduction of a tube into a hollow organ to restore or maintain patency if obstructed. It is differentiated from CATHETERIZATION in that the insertion of a catheter is usually performed for the introducing or withdrawing of fluids from the body.

Pathological processes involving the URETERS.

Endoscopic examination, therapy or surgery performed on the interior of blood vessels.

The evaluation of incidents involving the loss of function of a device. These evaluations are used for a variety of purposes such as to determine the failure rates, the causes of failures, costs of failures, and the reliability and maintainability of devices.

Studies to determine the advantages or disadvantages, practicability, or capability of accomplishing a projected plan, study, or project.

Conditional probability of exposure to a treatment given observed covariates.

A broad family of synthetic organosiloxane polymers containing a repeating silicon-oxygen backbone with organic side groups attached via carbon-silicon bonds. Depending on their structure, they are classified as liquids, gels, and elastomers. (From Merck Index, 12th ed)

Subspecialty of radiology that combines organ system radiography, catheter techniques and sectional imaging.

Organic polymeric materials which can be broken down by naturally occurring processes. This includes plastics created from bio-based or petrochemical-based materials.

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.

VASCULAR DISEASES that are associated with DIABETES MELLITUS.

Jaundice, the condition with yellowish staining of the skin and mucous membranes, that is due to impaired BILE flow in the BILIARY TRACT, such as INTRAHEPATIC CHOLESTASIS, or EXTRAHEPATIC CHOLESTASIS.

Hindrance of the passage of luminal contents in the DUODENUM. Duodenal obstruction can be partial or complete, and caused by intrinsic or extrinsic factors. Simple obstruction is associated with diminished or stopped flow of luminal contents. Strangulating obstruction is associated with impaired blood flow to the duodenum in addition to obstructed flow of luminal contents.

One of a pair of thick-walled tubes that transports urine from the KIDNEY PELVIS to the URINARY BLADDER.

Fiberoptic endoscopy designed for duodenal observation and cannulation of VATER'S AMPULLA, in order to visualize the pancreatic and biliary duct system by retrograde injection of contrast media. Endoscopic (Vater) papillotomy (SPHINCTEROTOMY, ENDOSCOPIC) may be performed during this procedure.

Statistical models used in survival analysis that assert that the effect of the study factors on the hazard rate in the study population is multiplicative and does not change over time.

The continuation of the femoral artery coursing through the popliteal fossa; it divides into the anterior and posterior tibial arteries.

High energy POSITRONS or ELECTRONS ejected from a disintegrating atomic nucleus.

Abnormal outpouching in the wall of intracranial blood vessels. Most common are the saccular (berry) aneurysms located at branch points in CIRCLE OF WILLIS at the base of the brain. Vessel rupture results in SUBARACHNOID HEMORRHAGE or INTRACRANIAL HEMORRHAGES. Giant aneurysms (>2.5 cm in diameter) may compress adjacent structures, including the OCULOMOTOR NERVE. (From Adams et al., Principles of Neurology, 6th ed, p841)

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.

An imaging method using LASERS that is used for mapping subsurface structure. When a reflective site in the sample is at the same optical path length (coherence) as the reference mirror, the detector observes interference fringes.

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 vein which drains the foot and leg.

Impairment of bile flow due to obstruction in small bile ducts (INTRAHEPATIC CHOLESTASIS) or obstruction in large bile ducts (EXTRAHEPATIC CHOLESTASIS).

Minimally invasive procedures, diagnostic or therapeutic, performed within the BLOOD VESSELS. They may be perfomed via ANGIOSCOPY; INTERVENTIONAL MAGNETIC RESONANCE IMAGING; INTERVENTIONAL RADIOGRAPHY; or INTERVENTIONAL ULTRASONOGRAPHY.

Microscopy in which the object is examined directly by an electron beam scanning the specimen point-by-point. The image is constructed by detecting the products of specimen interactions that are projected above the plane of the sample, such as backscattered electrons. Although SCANNING TRANSMISSION ELECTRON MICROSCOPY also scans the specimen point by point with the electron beam, the image is constructed by detecting the electrons, or their interaction products that are transmitted through the sample plane, so that is a form of TRANSMISSION ELECTRON MICROSCOPY.

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.

Any impairment, arrest, or reversal of the normal flow of INTESTINAL CONTENTS toward the ANAL CANAL.

A method in which either the observer(s) or the subject(s) is kept ignorant of the group to which the subjects are assigned.

Agents obtained from higher plants that have demonstrable cytostatic or antineoplastic activity.

An episode of MYOCARDIAL ISCHEMIA that generally lasts longer than a transient anginal episode that ultimately may lead to MYOCARDIAL INFARCTION.

A vein on either side of the body which is formed by the union of the external and internal iliac veins and passes upward to join with its fellow of the opposite side to form the inferior vena cava.

Radiography of the vascular system of the brain after injection of a contrast medium.

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.

Tantalum. A rare metallic element, atomic number 73, atomic weight 180.948, symbol Ta. It is a noncorrosive and malleable metal that has been used for plates or disks to replace cranial defects, for wire sutures, and for making prosthetic devices. (Dorland, 28th ed)

Impairment of bile flow in the large BILE DUCTS by mechanical obstruction or stricture due to benign or malignant processes.

PlA polymorphism of platelet glycoprotein IIIa and risk of restenosis after coronary stent placement. (1/7427)

BACKGROUND: Platelets play a central role in the process of restenosis after percutaneous coronary interventions. A polymorphism of platelet glycoprotein IIIa (PlA) has been associated with a higher risk of coronary thrombosis. We designed this prospective study to test the hypothesis that PlA polymorphism of glycoprotein IIIa is associated with an increased risk for restenosis after coronary stent placement. METHODS AND RESULTS: The study included 1150 consecutive patients with successful coronary stent placement and 6-month follow-up with coronary angiography. The end point of the study was the incidence of angiographic restenosis (>/=50% diameter stenosis) at follow-up. Of the 1150 patients, 72.5% were homozygous for PlA1, 24.7% were heterozygous (PlA1/A2), and 2.8% were homozygous for PlA2. Patients with the PlA2 allele demonstrated a significantly higher restenosis rate than did those without (47% versus 38%; OR, 1.42; 95% CI, 1.09 to 1.84). The risk was highest in homozygous carriers of PlA2 (53.1% restenosis rate). After adjustment for several clinical and angiographic characteristics, the presence of the PlA2 allele remained a significantly independent risk factor for restenosis (adjusted OR, 1.35; 95% CI, 1.07 to 1.70). The influence of the PlA2 allele on restenosis was stronger in women. Women with PlA2 had a restenosis rate of 52% compared with the 33% incidence among women homozygous for PlA1 (OR, 2.21; 95% CI, 1.27 to 3.85). CONCLUSIONS: This study showed a significant association between the PlA polymorphism of glycoprotein IIIa and the risk of restenosis after coronary stent placement. The risk was more pronounced in patients homozygous for PlA2 allele and in female patients. (+info)

In-stent neointimal proliferation correlates with the amount of residual plaque burden outside the stent: an intravascular ultrasound study. (2/7427)

BACKGROUND: The aim of this study was to evaluate the relationship between residual plaque burden after coronary stent implantation and the development of late in-stent neointimal proliferation. METHODS AND RESULTS: Between January 1996 and May 1997, 50 patients underwent intravascular ultrasound (IVUS) interrogation at 6+/-1.2 months after coronary stent implantation in native coronary arteries. IVUS images were acquired with a motorized pullback, and cross-sectional measurements were performed within the stents at 1-mm intervals. The following measurements were obtained: (1) lumen area (LA), (2) stent area (SA), (3) area delimited by the external elastic membrane (EEMA), (4) percent neointimal area calculated as (SA-LA/SA)x100, and (5) percent residual plaque area calculated as (EEMA-SA)/EEMAx100. Volume measurements within the stented segments were calculated by applying Simpson's rule. In the pooled data analysis of 876 cross sections, linear regression showed a significant positive correlation between percent residual plaque area and percent neointimal area (r=0.50, y= 45.03+0.29x, P<0.01). There was significant incremental increase in mean percent neointimal area for stepwise increase in percent residual plaque area. Mean percent neointimal area was 16.3+/-10.3% for lesions with a percent residual plaque area of <50% and 27.7+/-11% for lesions with a percent residual plaque area of >/=50% (P<0.001). The volumetric analysis showed that the percent residual plaque volume was significantly greater in restenotic lesions compared with nonrestenotic lesions (58.7+/-4.3% versus 51.4+/-5.7%, respectively; P<0.01). CONCLUSIONS: Late in-stent neointimal proliferation has a direct correlation with the amount of residual plaque burden after coronary stent implantation, supporting the hypothesis that plaque removal before stent implantation may reduce restenosis. (+info)

Comparison of quantitative coronary angiography, intravascular ultrasound, and coronary pressure measurement to assess optimum stent deployment. (3/7427)

BACKGROUND: Although intravascular ultrasound (IVUS) is the present standard for the evaluation of optimum stent deployment, this technique is expensive and not routinely feasible in most catheterization laboratories. Coronary pressure-derived myocardial fractional flow reserve (FFRmyo) is an easy, cheap, and rapidly obtainable index that is specific for the conductance of the epicardial coronary artery. In this study, we investigated the usefulness of coronary pressure measurement to predict optimum and suboptimum stent deployment. METHODS AND RESULTS: In 30 patients, a Wiktor-i stent was implanted at different inflation pressures, starting at 6 atm and increasing step by step to 8, 10, 12, and 14 atm, if necessary. After every step, stent deployment was evaluated by quantitative coronary angiography (QCA), IVUS, and coronary pressure measurement. If any of the 3 techniques did not yield an optimum result, the next inflation was performed, and all 3 investigational modalities were repeated until optimum stent deployment was present by all of them or until the treating physician decided to accept the result. Optimum deployment according to QCA was finally achieved in 24 patients, according to IVUS in 17 patients, and also according to coronary pressure measurement in 17 patients. During the step-up, a total of 81 paired IVUS and coronary pressure measurements were performed, of which 91% yielded concordant results (ie, either an optimum or a suboptimum expansion of the stent by both techniques, P<0.00001). On the contrary, QCA showed a low concordance rate with IVUS and FFRmyo (48% and 46%, respectively). CONCLUSIONS: In this study, using a coil stent, both IVUS and coronary pressure measurement were of similar value with respect to the assessment of optimum stent deployment. Therefore, coronary pressure measurement can be used as a cheap and rapid alternative to IVUS for that purpose. (+info)

The endovascular management of blue finger syndrome. (4/7427)

OBJECTIVES: To review our experience of the endovascular management of upper limb embolisation secondary to an ipsilateral proximal arterial lesion. DESIGN: A retrospective study. MATERIALS AND METHODS: Over 3 years, 17 patients presented with blue fingers secondary to an ipsilateral proximal vascular lesion. These have been managed using transluminal angioplasty (14) and arterial stenting (five), combined with embolectomy (two) and anticoagulation (three)/anti-platelet therapy (14). RESULTS: All the patients were treated successfully. There have been no further symptomatic embolic episodes originating from any of the treated lesions, and no surgical amputations. Complications were associated with the use of brachial arteriotomy for vascular access. CONCLUSIONS: Endovascular techniques are safe and effective in the management of upper limb embolic phenomena associated with an ipsilateral proximal focal vascular lesion. (+info)

Balloon-artery interactions during stent placement: a finite element analysis approach to pressure, compliance, and stent design as contributors to vascular injury. (5/7427)

Endovascular stents expand the arterial lumen more than balloon angioplasty and reduce rates of restenosis after coronary angioplasty in selected patients. Understanding the factors involved in vascular injury imposed during stent deployment may allow optimization of stent design and stent-placement protocols so as to limit vascular injury and perhaps reduce restenosis. Addressing the hypothesis that a previously undescribed mechanism of vascular injury during stent deployment is balloon-artery interaction, we have used finite element analysis to model how balloon-artery contact stress and area depend on stent-strut geometry, balloon compliance, and inflation pressure. We also examined superficial injury during deployment of stents of varied design in vivo and in a phantom model ex vivo to show that balloon-induced damage can be modulated by altering stent design. Our results show that higher inflation pressures, wider stent-strut openings, and more compliant balloon materials cause markedly larger surface-contact areas and contact stresses between stent struts. Appreciating that the contact stress and contact area are functions of placement pressure, stent geometry, and balloon compliance may help direct development of novel stent designs and stent-deployment protocols so as to minimize vascular injury during stenting and perhaps to optimize long-term outcomes. (+info)

Surgical transluminal iliac angioplasty with selective stenting: long-term results assessed by means of duplex scanning. (6/7427)

PURPOSE: The safety of iliac angioplasty and selective stenting performed in the operating room by vascular surgeons was evaluated, and the short- and long-term results were assessed by means of serial duplex scanning. METHODS: Between 1989 and 1996, 281 iliac stenotic or occlusive lesions in 235 consecutive patients with chronic limb ischemia were treated by means of percutaneous transluminal angioplasty (PTA) alone (n = 214) or PTA with stent (n = 67, 23.8%). There were 260 primary lesions and 21 restenosis after a first PTA, which were analyzed separately. Stents were implanted in selected cases, either primarily in totally occluded arteries or after suboptimum results of PTA (ie, residual stenosis or a dissection). Data were collected prospectively and analyzed retrospectively. Results were reported in an intention-to-treat basis. Clinical results and patency were evaluated by means of symptom assessment, ankle brachial pressure index, and duplex scanning at discharge and 1, 3, 6, and every 12 months after angioplasty. To identify factors that may affect outcome, 12 clinical and radiological variables, including the four categories of lesions defined by the Standards of Practice Committee of the Society of Cardiovascular and Interventional Radiology, were analyzed separately. The statistical significances of life-table analysis of patency were determined by means of the log-rank test. RESULTS: There were no postoperative deaths or amputations. Local, general, and vascular complications occurred in 2.1%, 1.3% and 4.7% of cases, respectively (total, 8.1%). The mean follow-up period was 29.6 months. The cumulative patency rates +/- SE of the 260 PTAs (including 55 PTAs plus stents) were 92.9% +/- 1.5% at 1 month, 86. 5% +/- 1.7% at 1 year, 81.2% +/- 2.3% at 2 years, 78.8% +/- 2.9% at 3 years, and 75.4% +/- 3.5% at 5 and 6 years. The two-year patency rate of 21 redo PTAs (including 11 PTAs plus stents) was 79.1% +/- 18.2%. Of 12 predictable variables studied in the first PTA group, only the category of the lesion was predictive of long-term patency. The two-year patency rate was 84% +/- 3% for 199 category 1 lesions and 69.7% +/- 6.5% for 61 category 2, 3, and 4 lesions together (P =. 02). There was no difference of patency in the stented and nonstented group. CONCLUSION: Iliac PTA alone or with the use of a stent (in cases of occlusion and/or suboptimal results of PTA) offers an excellent long-term patency rate. Categorization of lesions remains useful in predicting long-term outcome. PTA can be performed safely by vascular surgeons in the operating room and should be considered to be the primary treatment for localized iliac occlusive disease. (+info)

Relief of obstructive pelvic venous symptoms with endoluminal stenting. (7/7427)

PURPOSE: To select patients for percutaneous transluminal stenting of chronic postthrombotic pelvic venous obstructions (CPPVO), we evaluated the clinical symptoms in a cohort of candidates and in a series of successfully treated patients. METHODS: The symptoms of 42 patients (39 women) with CPPVO (38 left iliac; average history, 18 years) were recorded, and the venous anatomy was studied by means of duplex scanning, subtraction venography, and computed tomography or magnetic resonance imaging. Successfully stented patients were controlled by means of duplex scanning and assessment of symptoms. RESULTS: The typical symptoms of CPPVO were reported spontaneously by 24% of patients and uncovered by means of a targeted interview in an additional 47%. Of 42 patients, 15 had venous claudication, four had neurogenic claudication (caused by dilated veins in the spinal canal that arise from the collateral circulation), and 11 had both symptoms. Twelve patients had no specific symptoms. Placement of a stent was found to be technically feasible in 25 patients (60%), was attempted in 14 patients, and was primarily successful in 12 patients. One stent occluded within the first week. All other stents were fully patent after a mean of 15 months (range, 1 to 43 months). Satisfaction was high in the patients who had the typical symptoms, but low in those who lacked them. CONCLUSION: Venous claudication and neurogenic claudication caused by venous collaterals in the spinal canal are typical clinical features of CPPVO. We recommend searching for these symptoms, because recanalization by means of stenting is often feasible and rewarding. (+info)

Endovascular repair of a descending thoracic aortic aneurysm: a tip for systemic pressure reduction. (8/7427)

A proposed technique for systemic pressure reduction during deployment of a stent graft was studied. A 67-year-old man, who had a descending thoracic aneurysm, was successfully treated with an endovascular procedure. An occluding balloon was introduced into the inferior vena cava (IVC) through the femoral vein. The balloon volume was manipulated with carbon dioxide gas to reduce the venous return, resulting in a transient and well-controlled hypotension. This IVC-occluding technique for systemic pressure reduction may be safe and convenient to minimize distal migration of stent grafts. (+info)

Hopefully this does not mean a stint on Patmos.. What I lack in youth I make up for in immaturity. ...

https://ibiblio.org/bgreek/forum/viewtopic.php?f=6&p=36421

Hopefully this does not mean a stint on Patmos.. What I lack in youth I make up for in immaturity. ...

https://www.ibiblio.org/bgreek/forum/viewtopic.php?f=6&p=36421

Archer takes the first stint but is found shot dead that night. Thursby is also killed later and Spade is a suspect. The next ...

https://www.mobileread.com/index.php?page=5

Again you cant treat heart disease only via stents and surgery - the causes must be addressed. Women have children they cant ... Its like limiting yourself to stents and bypasses as the only means of dealing with heart disease. ...

https://www.airliners.net/forum/viewtopic.php?f=11&t=1459219&p=22715593

Their stint with the CPA was their first real job out of college. Experience or education in the field didnt matter. One guy ...

https://www.airliners.net/forum/viewtopic.php?f=11&t=1174181&p=16749951

bacterial colonization of ureteric stent Last post by ras2701 « Mon Jul 10, 2017 1:33 pm. Posted in The KPG Forum ...

https://kidneypatientguide.org.uk/forum/search.php?search_id=unanswered

bacterial colonization of ureteric stent Last post by ras2701 « Mon Jul 10, 2017 1:33 pm. Posted in The KPG Forum ...

https://www.kidneypatientguide.org.uk/forum/search.php?search_id=unanswered

superior vena cava blocked: stent but face remains puffy. April 2012: Teresa Trial, randomised to TDM1. Nov 2012 progressing on ...

https://her2support.org/vbulletin/showthread.php?t=54364

My last stint at Davis-Besse was in 1991. The plant was still struggling from past modifications that were completed after the ...

https://www.nukeworker.com/forum/index.php/topic,870.0/all.html

The Beijing Institute for Brain Disorders has been using stents to repair slowed jugular... ...

https://www.thisisms.com/forum/search.php?search_id=active_topics

Vettel was held up by Trulli who was on the medium tyre compound in the middle stint. Both of them drove well, but couldnt ...

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Hi all, well there was one small benefit from my displaced Stent. Last post by CureIous « Sat Jul 24, 2021 4:09 pm Posted in ...

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I doubt senile Joe even recalls his stint as KKK Cyclops. Biden is old, but not senile. Its about time people stop with that ...

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Hugs Helen* Curvebal really distracts me for a 5 minute stint at a time yep .. I am at my parents sat in the living room with ...

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Hugh Gaitskell died and Harold Wilson began his long stint as leader of the Labour Party. Russia put the first woman into space ...

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Im Tim and am a new rider (except for a short stint 20+ years ago). Ive been riding a Vespa GTS 300 since moving to SoCal ( ...

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Somebody tell me why Hugh Grant should get it other than his movies and his stint with a prostitute?? :eek: ...

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Looks like Josh Donaldsons rehab stint in Dunedin is not going as well as planned. Donaldson played Tuesday but reports ...

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My mom is vaccinated, my dad is waiting for an inactivated one since he has stents in his heart and is prone to blood clots. So ...

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Calder finished his career with a return stint as Eddy Grant s manager.. According to reports, Calder died of complications ...

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Towards the end of my stint I reformed the GameMasters into the Event Squad, so that the team could focus on events rather than ...

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... and stayed with my brother whom had just spent a two year stint of unemployment reading all he could find on Astrology. This ...

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... to a Specialist of the Delest Frontier Fleets and considerably improved chances in finding civilian employ when your stint with ...

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The stent is inserted along with the balloon catheter. (medlineplus.gov)
Using the catheter, the doctor places a stent in the vessel that needs to be held open. (kidshealth.org)
The balloon catheter is deflated and removed, leaving the stent permanently in place to hold the coronary artery open. (encyclopedia.com)
To keep the vessel open, doctors usually add a stent to the end of the balloon catheter. (webmd.com)
Such a stent may be deployed by winding the stent onto a catheter, immobilizing the two ends of the wire and one or more intermediate points, bringing the stent to the location where it is to be deployed, and releasing first the intermediate point or points and then the end points. (google.com)
The implant consists of a self-expanding stent mounted on a delivery catheter system. (fda.gov)
The delivery catheter is a long, thin, tube-like device used to deliver the stent into the artery. (fda.gov)
After the GORE® Embolic Filter is in place, the doctor inserts the GORE® Carotid Stent delivery catheter into the leg and moves the stent to the blocked area in the neck. (fda.gov)
The GORE® Carotid Stent is then released from the catheter and opens automatically over the blockage. (fda.gov)
The stent delivery catheter and the GORE® Embolic Filter are both removed. (fda.gov)
have problems preventing the GORE® Carotid Stent catheter from getting to the blockage. (fda.gov)
Doctors insert the stent -- a tiny mesh tube -- into the clogged artery with a balloon catheter. (medicinenet.com)
The VICI VENOUS STENT® System has two components: a stent made of a nickel-titanium alloy (nitinol) tubing and an over-the-wire stent delivery catheter system. (fda.gov)
Have a lesion that prevents complete inflation of a balloon dilatation catheter or proper placement of the stent or the stent delivery system. (fda.gov)
Your doctor will insert a balloon catheter into the carotid stent to open it wider. (bcm.edu)
In carotid stenting, a long, hollow tube (catheter) is threaded through the arteries to the narrowed carotid artery in the neck. (mayoclinic.org)
The stent is designed to be manually crimped onto a non-compliant PTA balloon catheter that is indicated for biliary stent expansion. (medtronic.com)
Once the stent is placed within the artery, the balloon is deflated and removed with the catheter. (healthcentral.com)
The stent incorporates platinum chromium (PtCr) alloy and features a catheter delivery system designed to facilitate deliverability in treating patients with coronary artery disease. (theatlantic.com)
Once the stent is in place, the balloon is deflated and the catheter and balloon will be removed. (familydoctor.org)
Once the catheter reached the blockage, the doctor inserted a stent or, if the patient was getting the sham procedure, simply pulled the catheter out. (tampabay.com)

The most common use for coronary stents is in the coronary arteries , into which a bare-metal stent , a drug-eluting stent , a bioabsorbable stent, a dual-therapy stent (combination of both drug and bioengineered stent), or occasionally a covered stent is inserted. (wikipedia.org)
Common sites treated with peripheral artery stents include the carotid , iliac , and femoral arteries. (wikipedia.org)
Although the most common use of stents is in coronary arteries, they are widely used in other natural body conduits, such as central and peripheral arteries and veins, bile ducts, esophagus, colon, trachea or large bronchi, ureters, and urethra. (yahoo.com)
Most of the time, stents are used to treat conditions that result when arteries become narrow or blocked. (yahoo.com)
Brain stent, stent in the heart arteries? (yahoo.com)
Q).What is the current perception and adoption of vascular stents for treating indications, including the iliac, femoropopliteal and infrapopliteal arteries in the lower extremity? (prnewswire.com)
The coronary stent is used to keep coronary arteries expanded, usually following a balloon angioplasty or other interventional procedure. (encyclopedia.com)
March 26, 2007 (New Orleans) -- Hundreds of thousands of Americans may undergo unnecessary angioplasty and stent procedures to open clogged heart arteries each year, a landmark study suggests. (webmd.com)
Most of the time, stents are used when arteries become narrow or blocked. (medlineplus.gov)
Stents are small tubes or tubular shaped meshes which are used to keep or rebuild the luminal size of passages in the human body like coronary arteries or the esophagus. (innovations-report.de)
Stents can be utilized as implants or in conjunction with an angioplasty (a technique for widening narrowed arteries). (innovations-report.de)
A stent is a medical device that can be inserted inside the body to bypass normal vessels in the body such as veins, arteries, and other passages. (ehow.co.uk)
The Cardiac Cath Lab at Dr. P. Phillips Hospital currently performs peripheral vascular angioplasty and stenting (meaning arteries other than those around the heart, such as in the legs, arms, stomach or kidneys). (orlandohealth.com)
The giant federal study that found the use of stents in stable heart-disease patients is no better than drugs to treat clogged arteries reached another, less-hyped conclusion. (massdevice.com)
A major new study has concluded that the use of stents in stable heart disease patients is no better than drugs to treat clogged arteries. (massdevice.com)
TUESDAY, Nov. 13, 2018 (HealthDay News) -- People with both diabetes and multiple clogged heart arteries live longer if they undergo bypass surgery rather than have their blood vessels reopened with stents, according to follow-up results from a landmark clinical trial . (webmd.com)
That's important news for about one-quarter of patients now receiving stents, because they are diabetic with many blocked arteries and would benefit more from bypass surgery, said study senior researcher Dr. Valentin Fuster. (webmd.com)
In 2012, the first FREEDOM results showed that diabetics with many blocked arteries had fewer heart attacks and strokes and were less likely to die if they underwent bypass surgery instead of getting a stent . (webmd.com)
Stents can clog over time, and don't address widespread hardening of the arteries in these patients, Valentine and Fuster said. (webmd.com)
that is, does the coating remain in place on the metallic stent or are small particles released downstream as the stent travels through the arteries to the implantation site? (medscape.com)
Stents and coronary bypass surgery reduce chest pain caused by inadequate blood supply, but medication and lifestyle modifications are just as effective as these procedures in preventing heart attacks , heart-related hospitalizations and death in people who have blocked arteries. (aarp.org)
Inside the coronary arteries of millions of americans are stents, metal mesh tubes the length of a dime that prop open narrowed blood vessels to help prevent heart attacks. (technologyreview.com)
But in about a quarter of patients, scar tissue builds up in and around the stents three to six months after they're inserted, threatening to reclog arteries. (technologyreview.com)
The GORE® Carotid Stent is used to re-open narrowed regions of the carotid arteries in the neck which supply blood to the brain. (fda.gov)
According to the American Heart Association, stents help keep coronary arteries open and reduce the chance of a heart attack. (medicinenet.com)
When my patients tell me proudly that they have five stents in one artery or a total of ten stents distributed over their various coronary arteries, I dare not belittle this achievement of modern technology by paying it no attention. (baltimoresun.com)
But in reality after stents are inserted dangerous clots can form within them or opened up arteries can get reclogged or patients consigned to taking powerful blood thinners for the rest of their lives can bleed into their brains or other parts of their bodies, suffering new complications. (baltimoresun.com)
St. Joseph begins sending letters to roughly 600 of Midei's patients telling them they might have had unneeded stents implanted in their coronary arteries and suggesting that they see a doctor. (baltimoresun.com)
TORONTO, March 31 - Patients whose carotid arteries were opened with a stent, combined with a neuroprotective device, showed significant improvements in cognitive function six months later, a researcher reported here today. (medpagetoday.com)
At present, the only patients treated with just balloon angioplasty are those with vessels less than 2mm (the smallest diameter stent ), certain types of lesions involving branches of coronary arteries, those with scar tissue in old stents, or those who cannot take the antiplatelet blood thinners after the procedure. (rxlist.com)
For instance, they found that stents with an 'open design'--where every other horizontal rod is taken out--bend easily, which makes them good to put in curvy coronary arteries. (nsf.gov)
Select the Protégé™ GPS™ self-expanding peripheral stent system when your work depends on precision, radial strength and flexibility in treating lesions in the common or external iliac arteries, subclavian arteries or in the biliary system. (medtronic.com)
The changes reflect the controversy that has enveloped coronary stents, which are threaded through the circulatory system on catheters to prop open blocked arteries. (bloomberg.com)
Drug-based management of partially blocked arteries costs $9,451 less per patient over a lifetime than stenting, according to a 2008 study in the journal Circulation. (bloomberg.com)
In its letter to physicians, the manufacturer notes that some cardiologists may be inappropriately inserting the stents, mainly by overexpanding narrower stents so that they will fit in arteries with larger diameters. (cmaj.ca)
Stents are used to restore blood flow in arteries that have narrowed due to plaque build-up. (healthcentral.com)
Depending on stent location and severity of the blockage, additional steps might include gradually increasing balloon size until the artery can be widened enough to place the stent, and using a filter in the carotid arteries to prevent blood clots and plaque from moving to the brain during the procedure. (healthcentral.com)
Coronary stents have revolutionized the treatment of heart disease, but they leave metal scaffolding inside arteries that can occasionally cause immune reactions and blood clots, and interfere with future surgeries. (technologyreview.com)
Surgeons use stents to open blocked arteries, but the devices can cause complications. (technologyreview.com)
According to research published this month in The Lancet , the stent appeared to be almost completely absorbed after two years, with no instances of cardiac death, no known cases of stent thrombosis, and no evidence that the arteries had begun to re-narrow. (technologyreview.com)
If you have CAD and plaque build-up in your arteries, your doctor may want to insert a stent. (familydoctor.org)
Stent retrievers are mesh devices that are threaded through a blood vessel in the groin to blocked arteries in the head under X-ray guidance to grab and remove the clot. (prweb.com)
A stent is a wire mesh that keeps open surgically cleared arteries. (fool.com)
Their study focused on the insertion of stents, tiny wire cages, to open blocked arteries. (tampabay.com)

This type of stent may lower the chance of the artery closing back up in the future. (medlineplus.gov)
The larger question, of course, is not just which type of stent to use. (bmj.com)
Annualized PVS market revenue by type of stent and indication in the lower extremity, annual cost of disease and vascular stent adoption pattern data from 2010-2012 and forecast for seven years to 2019. (prnewswire.com)
This type of stent is removed either at home or in the doctor's office. (kidshealth.org)
At that point, there was a question about the optimal treatment for this patient regarding the type of stent to be selected and the need for future combined antiplatelet and anticoagulation treatment. (ahajournals.org)
In particular, consideration should be given to the urgency of the surgery and to the mode of revascularization, including, when applicable, the type of stent to be used. (ahajournals.org)

The indications for airway stenting, types of stents, insertion technique, and potential complications are reviewed here. (uptodate.com)
Also, patients are generally unaware of the choices they have in terms of the types of stents and the various brands that are available in the market, and have to buy stents directly from the hospitals. (prnewswire.com)
Several types of stents are available for different indications. (news-medical.net)

Vascular stents made of metals can lead to thrombosis at the site of treatment or to inflammation scarring. (wikipedia.org)
Which kind should you recommend: drug eluting stents, which may prevent early restenosis better but are more expensive and may lead to late thrombosis? (bmj.com)
Or bare metal stents, which may not be as good at preventing restenosis initially but are cheaper and less likely to lead to late thrombosis? (bmj.com)
Stent thrombosis is a rare complication of percutaneous coronary intervention and carries a poor prognosis. (springer.com)
Recent improvements in stent technology and new antiplatelet therapies have reduced the incidence of stent thrombosis. (springer.com)
Coronary stent thrombosis has been defined by the Academic Research Consortium criteria. (springer.com)
By employing OCT, a number of pathologies such as malapposition, rupture of neoatherosclerosis, uncovered struts, restenosis, evagination, underexpansion, and dissection of the borders have been identified as risk factors for coronary stent thrombosis, allowing causal and specific treatments. (springer.com)
Predictors of coronary stent thrombosis: the Dutch Stent Thrombosis Registry. (springer.com)
Stent thrombosis in the modern era: a pooled analysis of multicenter coronary stent clinical trials. (springer.com)
Stent thrombosis in drug-eluting or bare-metal stents in patients receiving dual antiplatelet therapy. (springer.com)
Kang S-H, Chae I-H, Park J-J, Lee HS, Kang D-Y, Hwang S-S, Youn T-J, Kim H-S. Stent thrombosis with drug-eluting stents and bioresorbable scaffolds: evidence from a network meta-analysis of 147 trials. (springer.com)
The VICI VENOUS STENT® System is used to reopen narrowed regions of the iliofemoral vein caused by a collection of blood clots that can form along the lining of the veins following a deep vein thrombosis (post-thrombotic syndrome) or the squeezing of the iliofemoral vein between a bone and an overlying artery (iliofemoral compression). (fda.gov)
Early experience with the CYPHER stent has shown that stent thrombosis occurs in 0.5% of patients. (cmaj.ca)
Since the product was approved in the United States, the FDA has received 47 reports of stent thrombosis that occurred at the time of implantation or within a few days of implantation. (cmaj.ca)
5 Although it is unclear whether the rate of stent thrombosis that is being detected in clinical practice is higher than that observed in the pre-approval clinical trials, the manufacturer issued a warning letter to US physicians on July 7. (cmaj.ca)
The materials used incite an immune response, and damage to the artery wall can trigger the formation of blood clots that, once dislodged, can cause stroke or other damage in a process called late stent thrombosis. (technologyreview.com)
If you have a stent that's bioabsorbable, could return a vessel to its native condition and protect it from late-stent thrombosis, that's an inherently appealing concept, especially when you talk about the fact that we're implanting about a million patients per year here in the U.S.," says Gregg Stone , director of cardiovascular research and education at New York-Presbyterian Hospital and the Columbia University Medical Center. (technologyreview.com)
This innovative stent is also supported by strong clinical outcomes from the PLATINUM trials, which demonstrated very low rates of revascularization and stent thrombosis at one year. (theatlantic.com)
Oral anticoagulation was routinely used for coronary stent thrombosis prevention during the first era of stents. (ahajournals.org)
and the duration of treatment are essential considerations in relation to the risk of stent thrombosis/thromboembolic events and bleeding risk. (ahajournals.org)
Interruption of OAA therapy, as often happens for noncardiac surgery, has been shown to be an important factor in stent thrombosis. (ahajournals.org)
1,2 In recent years, there has been an explosion in the use of DES, for which the risk of stent thrombosis, although likely to be similar to the standard bare-metal stent in the early phase, is less well defined owing to the longer, potentially indefinite period of time over which it may occur. (ahajournals.org)
3 Concern about the possible increased incidence of stent thrombosis with DES led to the publication of a consensus statement that highlighted the importance of not prematurely discontinuing dual OAA therapy and increasing its recommended duration in the case of DES to 1 year. (ahajournals.org)
The timing and definition of stent thrombosis vary between studies, which has led to a call for standardizing definitions. (ahajournals.org)
5 In addition, although most of the trials have included low-risk patients and coronary lesions, the use of DES in the real world is much less controlled, potentially increasing the risk of stent thrombosis. (ahajournals.org)
It has been well established that patients who undergo noncardiac surgery soon after stent implantation are at increased risk for stent thrombosis. (ahajournals.org)
First generation DES effectively reduced in-stent restenosis, but profoundly delay healing and are susceptible to late stent thrombosis, leading to significant clinical complications in the long term. (mdpi.com)
This review characterizes the development of coronary stents, detailing the incremental improvements, which aim to attenuate the major clinical complications of thrombosis and restenosis. (mdpi.com)

Clogging of the inside of the stent (in-stent restenosis). (medlineplus.gov)
Drug-eluting stents with pharmacologic agents or as drug delivery vehicles have been developed as an alternative to decrease the chances of restenosis. (wikipedia.org)
By forming a rigid support, the stent can prevent the vessel from reclosing (a process called restenosis) and reduce the need for coronary bypass surgery. (encyclopedia.com)
These coated stents have significantly reduced restenosis rates - down to 3% - in some clinical studies. (encyclopedia.com)
Drug-eluting stents - These stents are coated with medications that prevent inflammation and restenosis of the artery on a long term basis. (news-medical.net)
One of the most common complications when using stents is in-stent restenosis and stent loss. (innovations-report.de)
In-stent restenosis is the renarrowing of the implanted stent which occurs in ~ 30 % of all cases. (innovations-report.de)
To prevent restenosis drug eluting stents have been developed. (innovations-report.de)
The inner surface of the stent is microstructured limiting laminar flows and preventing in-stent restenosis. (innovations-report.de)
With bare metal stents, scar tissue was known to form within the device, leading to re-narrowing, a condition called restenosis, Dr. Bram Zuckerman, director of cardiovascular devices at the FDA, said last week. (newsday.com)
So-called drug-eluting metal stents relieved restenosis but patients lost some flexibility in vessels with metallic stents, small cylindrical mesh-like devices that become permanent implants. (newsday.com)
Data from the British Columbia Cardiac Registries during the mid-1990s show that restenosis occurs in about 15% of patients with stents. (cmaj.ca)
The stent is not indicated for the treatment of restenosis. (cmaj.ca)
It was used as a scaffold to prevent the vessel from closing and to avoid restenosis in coronary surgery-a condition where scar tissue grows within the stent and interferes with vascular flow. (wikipedia.org)
To further reduce the incidence of restenosis, the drug-eluting stent was introduced in 2003. (wikipedia.org)

A ureteral stent (pronounced you-REE-ter-ul), or ureteric stent , is a thin tube inserted into the ureter to prevent or treat obstruction of the urine flow from the kidney . (wikipedia.org)
Three-dimensional reconstructed CT scan image of a ureteral stent in the left kidney (indicated by yellow arrow). (wikipedia.org)
What's a Ureteral Stent? (kidshealth.org)
How Long Does a Ureteral Stent Stay In? (kidshealth.org)
How Is a Ureteral Stent Removed? (kidshealth.org)
A ureteral stent that's going to be in place for only a few days to a week usually has a string attached to the end of it. (kidshealth.org)
A ureteral stent sometimes can be uncomfortable and cause some blood in the pee . (kidshealth.org)
1. A ureteral stent, comprising: an elongate body having a proximal end and a distal end and defining a lumen and an opening in communication with the lumen, the lumen having a diameter, the opening having a width greater than ½ the size of the diameter of the lumen and less than the diameter of the lumen, the opening having a length at least twice the width of the opening. (freepatentsonline.com)
2. The ureteral stent of claim 1, wherein the elongate body defines at least one channel on an outer surface of the elongate body. (freepatentsonline.com)
3. The ureteral stent of claim 1, further comprising: a retention member disposed at least one of the proximal end or the distal end of the elongate body, the retention member configured to help anchor the elongate body within a ureter. (freepatentsonline.com)
4. The ureteral stent of claim 1, further comprising: a first retention member at the proximal end of the elongate body and a second retention member at the distal end of the elongate body, the first retention member configured to be disposed within a bladder, the second retention member configured to be disposed within a kidney. (freepatentsonline.com)
6. The ureteral stent of claim 1, wherein the opening extends from the proximal end to the distal end of the elongate body. (freepatentsonline.com)
7. The ureteral stent of claim 1, wherein the opening is configured to laterally receive a guidewire therethrough, the elongate body being configured to releasably couple the guidewire within the lumen of the elongate body such that the elongate body can be slidably moved along the guidewire. (freepatentsonline.com)
9. The ureteral stent of claim 8, wherein the elongate body defines a plurality of channels on an outer surface of the elongate body. (freepatentsonline.com)
Do use code 50382 when a ureteral stent is removed and replaced percutaneously. (aapc.com)
Amplatz wire and coaxial placement of an 8 French ureteral stent (50393, 74480) is performed and the loop locked in the renal pelvis. (aapc.com)
Two days later the nephrostomy is removed under fluoroscopic guidance to avoid pulling out the ureteral stent (50389). (aapc.com)
Example 3) Thirty year old with fractured ureteral stent. (aapc.com)
A new ureteral stent is placed. (aapc.com)

In medicine , a stent is a metal or plastic tube inserted into the lumen of an anatomic vessel or duct to keep the passageway open, and stenting is the placement of a stent. (wikipedia.org)
Stent" is also used as a verb to describe the placement of such a device, particularly when a disease such as atherosclerosis has pathologically narrowed a structure such as an artery . (wikipedia.org)
Other types are duodenal stents, colonic stents, and pancreatic stents, the designations referring to the location of their placement. (wikipedia.org)
What Happens During the Placement of Cardiac Stents? (kidshealth.org)
What Happens After the Cardiac Stent Placement? (kidshealth.org)
Stent placement is part of more than 70% of interventional procedures. (encyclopedia.com)
Stent placement is not considered major surgery and takes approximately one hour. (healthcentral.com)
In addition, a unique 360 degree kidney curl helps to achieve easier stent placement in the renal pelvis or a calyx. (bio-medicine.org)

These stents ensure that the ureter does not spasm and collapse after the trauma of the procedure. (wikipedia.org)
The stent is removed by cystoscopy, an outpatient procedure. (wikipedia.org)
Your child won't be able to eat or drink for several hours before the cardiac stent procedure. (kidshealth.org)
Can I Stay With My Child During the Cardiac Stent Procedure? (kidshealth.org)
When a stent is placed into the body, the procedure is called stenting. (medlineplus.gov)
Angioplasty became more popular when the first drug-coated stent came out that year, virtually eliminating the procedure\'s main drawback: scar tissue requiring a repeat effort to reopen the vessel. (dailystrength.org)
Manufacturers of stents for percutaneous coronary intervention (PCI) note that the Ischemia study also concluded that patients who undergo a stenting procedure have a better quality of life. (massdevice.com)
These studies usually involve evaluation of a composite primary endpoint of cardiac death, myocardial infarction, and need for repeat procedure involving the lesion where the stent was placed. (medscape.com)
The GORE® Carotid Stent is used with a protection device (GORE® Embolic Filter) that filters blood flow at the treatment site to capture and remove particles that may come loose during the procedure. (fda.gov)
After the procedure, a campaign aide reported that Sanders "feels better than ever because that's how people feel after they get a stent and there's more blood flow. (medicinenet.com)
We don't know all the details, but this is a common, safe procedure, and with contemporary stents, it generally comes with a short recovery time," said Nissen, who wasn't involved in Sanders' care. (medicinenet.com)
In the time before stents became all the rage, cardiologists were cautious about the procedure, placing one or two stents at one sitting, but with experience the confidence of the interventionists grew and they began to insert as many as three stents at one sitting. (baltimoresun.com)
In the procedure, an Accunet filter was deployed above the artery narrowing and an Acculink stent was placed. (medpagetoday.com)
In addition to the use of simple balloon angioplasty, the availability of stents, in a wire-mesh design, have expanded the spectrum of people suitable for percutaneous coronary intervention, as well as enhanced the safety and long-term results of the procedure. (rxlist.com)
Canic and Tambaca have also used the model to design a stent with mechanical properties specifically tailored to an experimental heart-valve replacement procedure. (nsf.gov)
She found that this specialized stent works best for the procedure when it's stiff in the middle and less stiff at the ends. (nsf.gov)
On the day prior to your treatment you may be asked to withhold some of your blood pressure medication so as not to interfere with the blood pressure response during the actual stent procedure. (bcm.edu)
On the morning of the stent procedure, make sure you take aspirin and other blood thinning medication. (bcm.edu)
Angioplasty is the procedure used for placing stents. (healthcentral.com)
Stents are place during a procedure called an angioplasty. (familydoctor.org)
Then the subjects had a procedure: a real or fake insertion of a stent. (tampabay.com)
Those who got the sham procedure did just as well as those who got stents. (tampabay.com)
Since the procedure carries some risks, including death, stents should be used only for people who are having heart attacks, she added. (tampabay.com)

Doctors may place a stent if a blood vessel is too narrow for enough blood to pass through. (kidshealth.org)
While uncommon, damage to the blood vessel can happen and a stent can move from the correct place. (kidshealth.org)
The main purpose of a stent is to counteract significant decreases in vessel or duct diameter by acutely propping open the conduit by a mechanical scaffold or stent. (yahoo.com)
Stents are inserted routinely now at angioplasty to improve the chances of keeping the vessel open. (yahoo.com)
A coronary stent is an artificial support device placed in the coronary artery to keep the vessel open after treatment for coronary artery disease . (encyclopedia.com)
Through a blood vessel in the groin, doctors push a tube to a blocked heart artery, inflate a balloon to flatten the clog, and prop the artery open with a stent. (dailystrength.org)
The term "stent" has come into widespread use to denote any of a large variety of spring-like support structures, in the form of a tube which is open at both ends, which can be implanted inside a blood vessel or other tubular body conduit, to help keep the vessel or conduit open. (google.com)
The stent remains permanently implanted in the neck artery and acts as a support for the newly opened section of the blood vessel. (fda.gov)
The stent opens blockages in the blood vessel in order to prevent future strokes. (fda.gov)
The apertured links and undulating links provide the stent with a high degree of flexibility in the longitudinal direction, yet the stent has adequate vessel wall coverage and radial strength sufficient to hold open an artery or other body lumen. (google.ca)
A metal mesh tube (stent) is inserted into the vessel to serve as a scaffold that helps prevent the artery from narrowing again. (mayoclinic.org)
A fully bio-absorbable coronary stent that scaffolds the vessel wall when needed and disappears once it has remodelled itself has theoretical advantages. (thaindian.com)
For example, there's less potential for late stent blockage as there will be no foreign material exposed to the blood if the stent has disappeared into the vessel wall. (thaindian.com)
1. Match the stent size as closely as possible to vessel diameter. (cmaj.ca)
4. Use proper technique to ensure that the stent is fully deployed and in contact with the vessel wall. (cmaj.ca)
Endovascular aortic aneurysm repair involves accessing the damaged aorta by first puncturing a blood vessel in the groin, often without making an incision, and then inserting a metallic stent that is guided using X-rays to the target area where it is then expanded. (ucsd.edu)
The first balloon expandable stents were designed from surgical grade stainless steel, and aimed to provide additional mechanical support, limiting vessel recoil and preventing acute occlusion [ 6 ]. (mdpi.com)

Allium's self-expanding Biliary Stent has a large caliber (8-10mm in diameter) and is made of a superelastic alloy covered by a polymeric material. (medgadget.com)
All indications related to the PROTÉGÉ GPS SELF-EXPANDING PERIPHERAL AND BILIARY STENT are not approved globally, please refer to the complete Instructions for Use manual for the indication for Use approved in your geography. (medtronic.com)
The IntraStent™ Max™ LD biliary stent is your best choice for strength within the IntraStent family. (medtronic.com)

A coronary artery stent is a small, metal mesh tube that expands inside a coronary artery. (medlineplus.gov)
A wire mesh tube (stent) may then be placed in this blocked area. (medlineplus.gov)
Cardiac stents are very small mesh wire tubes. (kidshealth.org)
The stent is usually a stainless steel mesh tube that is available in various sizes to match the size of the artery and hold it open after the blockage in the artery has been treated. (encyclopedia.com)
Bare metal coronary stents - These are tubular, mesh-like devices that do not have any medications embedded in them. (news-medical.net)
A stent is a small wire mesh tube used to open and support a narrowed artery, much like a scaffold. (orlandohealth.com)
2. The stent of claim 1 , wherein said mesh structure comprises at least one portion where said threads cross to define a crossing point, wherein said threads at said crossing point being configured to slide with respect to one another. (google.com)
3. The stent of claim 1 , wherein said mesh structure comprises at least one portion where said threads cross to define an interlacing pattern. (google.com)
The researchers attached a tiny, flat pressure sensor to the stent and modified the pattern of the wire mesh so that it acts as an antenna. (technologyreview.com)
The stent is made of a nickel-titanium alloy (nitinol) tubing, laser-cut into a mesh shape, with an expanded polytetrafluoroethylene (ePTFE) lattice attached to its outer surface. (fda.gov)
Stents are tiny mesh tubes made from metal alloys that hold blood vessels open after they've been clogged with disease-causing plaque. (nsf.gov)
The researchers studied 980 patients with type 2 diabetes who had undergone percutaneous cardiac intervention (PCI) to clear a blocked coronary artery and place a supportive mesh tube known as a stent. (reuters.com)
Eventually, arterial cells will cover the mesh of the stent with the inner layer looking like a normal blood pressure. (healthcentral.com)
Since the balloon is immediately deflated after maximal inflation during stent implantation and 80% of the expandable wire mesh of the stent was open surface opposing elastic recoil, the process minimized endothelial damage compared to balloon angioplasty alone [ 5 ]. (mdpi.com)

The main complications with ureteral stents are dislocation, infection and blockage by encrustation. (wikipedia.org)
Besides failing to perform the job it was intended to do, a moved stent can lead to more serious problems like creating a blockage somewhere else in the body. (ehow.co.uk)
The 78-year-old presidential hopeful received two stents to open the blockage. (medicinenet.com)
According to Weaver, "following medical evaluation and testing he was found to have a blockage in one artery and two stents were successfully inserted. (medicinenet.com)
That tube has the stent on the tip of a deflated balloon, which the cardiologist guides to the site of blockage. (newsday.com)
The stent stays within the artery to help prevent the artery from future blockage or narrowing. (healthcentral.com)
Angiplasty and stenting will be performed to reduce the blockage. (hopkinsmedicine.org)
One of the limitations of bare metal stents is that 30% of patients develop scar tissue that can cause re-blockage. (fool.com)
Cardiologists said one reason might be that atherosclerosis affects many blood vessels, and stenting only the largest blockage may not make much difference in a patient's discomfort. (tampabay.com)

2. The stented valve of claim 1, wherein one of the first and second ends of the stent structure is curved outwardly relative to the longitudinal axis. (freepatentsonline.com)
7. The stented valve of claim 4, wherein a central region of the stent structure between the first and second ends has a diameter than is larger than the diameter of both the first and second ends of the stent. (freepatentsonline.com)

For the first time in Ontario and only the second time in Canada, physicians performed a clinical angioplasty using a stent that completely dissolves over time. (uhn.ca)
The stent used is the only bioabsorbable stent available for clinical use right now and is currently only available by special access from Health Canada. (uhn.ca)
Peripheral vascular stents including bare metal, drug-eluting, covered and bioabsorbable stents are associated with improved clinical outcomes compared to balloon angioplasty alone. (prnewswire.com)
However, as clinical data and appropriate reimbursement and costs are established, adoption of innovative stent technologies such as drug-eluting stents and bioabsorbable stents will increase in the future. (prnewswire.com)
Peripheral stenting will continue to increase in the future given the rising prevalence of peripheral artery disease in the lower extremity and improved clinical outcomes compared to balloon angioplasty alone. (prnewswire.com)
Clinical end points in coronary stent trials: a case for standardized definitions. (springer.com)
The EluNIR drug-eluting stent made by Medinol performed just as well as the Resolute Integrity or Resolute Onyx stents from Medtronic (NYSE:MDT), according to new clinical study results from an international team of researchers. (massdevice.com)
One of my main roles at the FDA is to review proposed clinical trials to evaluate new stents as well as to assess the data submitted for FDA approval to allow marketing of a new stent in the United States. (medscape.com)
In a clinical study, the stent was implanted successfully in 265 out of 265 patients in the United States, with six (6) patients suffering a stroke. (fda.gov)
In a clinical study, which included 170 patients who had post-thrombotic syndrome or iliofemoral compression, approximately 84% of patients who received stents continued to have an open iliofemoral vein after one year. (fda.gov)
The researchers write that more study is needed before they can conclude strict glucose control after stenting will improve long-term clinical outcomes in people with diabetes. (reuters.com)
Dr. Luis Gruberg, who led clinical studies of the device at Stony Brook University Hospital, said the newly approved stent can't be used in all types of blockages. (newsday.com)
WellPoint Inc., the nation's second-largest health insurer, is considering coverage changes to better inform patients about elective stents' risks and benefits, said Alan Rosenberg, the company's vice president of medical and clinical pharmacy policy. (bloomberg.com)
Initial clinical trials of these drug-eluting stents have been completed and other trials are underway. (cmaj.ca)
Furthermore, it should be noted that in 1 major study that demonstrated the benefits of the CYPHER stent 7 the device was investigated in a limited clinical application. (cmaj.ca)
The stent, made by Abbott Laboratories in Illinois, just finished its first test-a two-year trial involving 30 patients-and now, after a few adjustments, the company is launching its next phase of clinical tests. (technologyreview.com)
The everolimus drug and fluorinated copolymer used on the PROMUS Element Stent have been studied in multiple randomized clinical trials and 'real-world' registries, demonstrating excellent long-term safety and efficacy. (theatlantic.com)
In the new study, researchers analyzed data on patients treated with both IV t-PA and stent retrievers from the Solitaire With the Intention For Thrombectomy as PRIMary Endovascular Treatment (SWIFT PRIME) Trial to learn more about the clinical relevance of the duration of time from symptom onset to clot removal. (prweb.com)
Two possible clinical scenarios exist for patients with stents who have noncardiac surgery. (ahajournals.org)
U.S. clinical guidelines say stenting is appropriate for patients with a blocked artery and chest pain who have tried optimal medical therapy, meaning medications like those given to the study patients. (tampabay.com)

FDA public health notification: complications from metallic tracheal stents in patients with benign airway disorders, 2005 www.fda.gov/cdrh/safety/072905-tracheal.html (Accessed on January 15, 2007). (uptodate.com)
Also, advancements in technology such as the introduction of bioabsorbable stents in the Indian market in December 2012 has made such stents more acceptable to patients, thereby providing further stimulus for market growth. (prnewswire.com)
The length of the stents used in adult patients varies between 24 and 30 cm. (wikipedia.org)
Most patients tolerate having the stent removed using only a topical anesthetic placed in the urethra. (wikipedia.org)
It is, "What are the relative advantages and disadvantages of the various treatments for patients with symptomatic coronary artery disease-medical therapy only, percutaneous transluminal angioplasty with stents, and coronary artery bypass grafting. (bmj.com)
They followed over 1700 patients who were judged appropriate for surgery or stenting or both for six years. (bmj.com)
He makes a persuasive case that multidisciplinary teams should be making recommendations to patients whether they should continue medical treatment or receive stents or surgery. (bmj.com)
Some patients are served well by stents but others require CABG. (yahoo.com)
This new stent may turn out to be better for patients because there's no metal,' says Dr. Vlad Dzavik, deputy head, Division of Cardiology and Director of Interventional Cardiology Research, University Health Network. (uhn.ca)
And a stent that is not there for a patient's lifetime might be especially useful in younger patients. (uhn.ca)
Researchers want to learn more about this stent so that they can better understand which patients might benefit most from having this kind of a scaffold inserted. (uhn.ca)
Doctors think these stents may raise the risk of life-threatening blood clots months and even years later unless people stay on Plavix, an anti-clotting drug whose long-term safety in stent patients has not been established. (dailystrength.org)
Two brands are sold in the United States - Taxus, by Boston Scientific Corp., and Cypher, by Johnson & Johnson\'s Cordis Corp. Labels say patients should take baby aspirin and Plavix for three months with Cypher and six months with Taxus, based on how long the stents release medication and how long doctors believed it took for the artery to repair itself by forming a new lining. (dailystrength.org)
This produced the bombshell finding that patients with coated stents had double the risk of cardiac problems after stopping Plavix than those with plain metal stents. (dailystrength.org)
Cleveland Clinic physician Tom Gildea developed the stents to keep open the airways of patients with serious breathing disorders caused by inflammation, trauma, tumors and other masses. (massdevice.com)
Patients treated with coronary-artery bypass surgery survive about three years longer than those who have their blood vessels propped open with stents, researchers reported Sunday at the American Heart Association's annual meeting, in Chicago. (webmd.com)
The initial trial involved 1,900 patients who randomly underwent either stenting or bypass surgery between 2005 and 2010. (webmd.com)
We also ask for a smaller subset of patients with protocol-mandated angiography and intravascular ultrasound to assess healing responses and how well the stent is apposed to the artery wall, both immediately post-implantation and in the long term. (medscape.com)
Whenever my diabetic patients return to me after one of these procedures, I am struck by how routine stenting has become. (baltimoresun.com)
I always give these stories the appropriate gasps in my office, my eyes hopefully reflecting my amazement, but I cannot help what my sagacious head exasperatedly takes note: that stents have made it seem like coronary artery disease, often a lethal and progressive condition, is endlessly manageable and stents have corrupted my patients' desire to change their life styles. (baltimoresun.com)
like liquid Drano to the plumber, so the stents to the cardiologists, these patients imagine. (baltimoresun.com)
A MidAtlantic cardiologist informs one of Midei's patients - an St. Joseph's employee - that his stent was unnecessary. (baltimoresun.com)
Explain to interested patients that this preliminary study suggests using a neuroprotective filter when placing a stent in the carotid artery. (medpagetoday.com)
Her work could help manufacturers optimize stent design and help doctors choose the right stents for their patients, ultimately improving patient outcomes. (nsf.gov)
Allium's stents are cost effective and more acceptable to physicians and patients. (medgadget.com)
For heart attack patients, a stent is the medical device that provides the best chance of recovery. (psmag.com)
A coronary stent that slowly dissolves over time - vanishing in the fashion of biodegradable sutures and absorbable bone screws - has won the approval of federal regulators for use in patients with cardiovascular disease. (newsday.com)
Pappas sees other possibilities: "This may be a good option for people who need multiple stents and with this type of platform, patients can avoid the layers and layers of metal. (newsday.com)
Eight studies have found stents are no better than drug-based therapy in preventing heart attacks and death in patients with stable heart disease. (bloomberg.com)
Insurers, too, are questioning whether doctors adequately inform patients about the risks of stenting or the benefits of alternatives. (bloomberg.com)
Insurer HealthNow New York Inc. brings extra review to cases in which patients seek elective stents under a pilot project in Buffalo that's aimed at steering them toward medicinal treatments instead, said Alan Saltzman, the company's medical director. (bloomberg.com)
Stents may provide less benefit to such patients, he said. (bloomberg.com)
You can call anything 'appropriate,'" said Boden, the principal investigator of the "Courage" study, the first large trial to cast doubt on stents' benefit for stable patients, in 2007. (bloomberg.com)
London, March 14 (IANS) Bio-absorbable stents are safe and effective in patients with single coronary artery lesions, according to this week's edition of The Lancet. (thaindian.com)
Patrick Serruys of Erasmus Medical Center and John Ormiston of Auckland City Hospital studied 30 patients who had ischaemia and a single lesion, suitable for treatment with a single 3×12 mm or 3×18mm stent. (thaindian.com)
Patients with heart disease could soon be treated without stents, thanks to tiny nanoparticles that can home in on damaged tissue and release drugs. (tgdaily.com)
For its initial test run, the stent was placed in patients with just a single narrowed or blocked artery. (technologyreview.com)
Because the stent was tested on so few people, however, and because those patients had very simple problems, it is difficult to know whether it will match the long-term success of its metal predecessors. (technologyreview.com)
Time from onset of symptoms to the initiation of clot removal averaged more than 4.5 hours for patients who initially arrived to a referring facility, compared with only 3 hours for patients who presented directly to an endovascular-capable center with stent- retriever services available. (prweb.com)
As a result, there is a significant variation in the regimens followed for patients on anticoagulation who have had a stent implanted, as was demonstrated in a survey among interventional cardiology centers worldwide. (ahajournals.org)
Noncardiac surgery performed in patients who have had recent coronary stenting exposes them to an increased risk of major cardiac events in the perioperative period, especially if the OAA therapy is interrupted. (ahajournals.org)
The petitioner allegedly colluded with dealers and purchased stents post expiry date, manipulated the expiry dates in invoices, used them for 10 patients who got treatment under the Tamil Nadu Government Comprehensive Health Insurance Scheme and claimed charges from the government. (indiatimes.com)
Therefore, SEMS should only be used in nonmalignant large airway disease as a last resort for patients in whom other endoscopic methods, including silicone stents and dilations, as well as surgical options have failed or are technically not feasible. (hindawi.com)
Sometimes patients get stents when they have no pain at all, just blockages. (tampabay.com)
More than 500,000 heart patients worldwide have stents inserted each year to relieve chest pain, according to the researchers. (tampabay.com)
For the study, Dr. Justin E. Davies, a cardiologist at Imperial College London, and his colleagues recruited 200 patients with a profoundly blocked coronary artery and chest pain severe enough to limit physical activity, common reasons for inserting a stent. (tampabay.com)
Neither the patients nor the researchers assessing them afterward knew who had received a stent. (tampabay.com)
The stents did what they were supposed to do in patients who received them. (tampabay.com)
But those guidelines were based on studies in which patients simply said they felt better after having stents inserted. (tampabay.com)

Cordis Corporation today announced that a U.S. District Court jury in Wilmington, Delaware found that Boston Scientific's Taxus drug-eluting stent and its Liberte and Express bare metal stents infringe Cordis' pioneering Palmaz patent for balloon expandable stents, and that the bare metal Liberte stent also infringes another Cordis patent - the Gray patent - which relates to flexible balloon expandable stents and expires in 2016. (news-medical.net)
The valuation of Global Bioabsorbable Stents Market is USD 395.5 million in 2016. (openpr.com)
The Bioabsorbable Stents market is estimated to reach USD 3.32 billion in 2022, growing at a CAGR of 42.60% between 2016 and 2022 according to this study. (openpr.com)
In this report, the global Intracranial Stents market is valued at USD XX million in 2016 and is expected to reach USD XX million by the end of 2022, growing at a CAGR of XX% between 2016 and 2022. (mynewsdesk.com)

As with any medical device placed inside the body, certain complications can arise when a stent is inserted. (ehow.co.uk)
This can cause serious complications, because the stent is no longer where it's supposed to be and it may not be performing its job once it has moved. (ehow.co.uk)
The use of newer devices such as intracoronary stents and atherectomy , as well as newer pharmacologic agents has resulted in higher success rates, reduced complications, and reduced recurrence after percutaneous coronary intervention . (rxlist.com)
Permanent metallic stenting can be susceptible to such blockages and other complications. (thaindian.com)
Over the past few years, these complications have decreased with the widespread use of anticlotting therapies and drug eluting stents coated with immune suppressants. (technologyreview.com)
Reported complications include infection, granulation tissue formation, stent migration, stent fracture, airway perforation and fistula formation, as well as extension of the initial injury, potentially eliminating other therapeutic options such as surgical resection. (hindawi.com)

Retrieved on October 13, 2019 from https://www.news-medical.net/health/Stent-Types.aspx. (news-medical.net)
2019. Stent Types . (news-medical.net)

Stent grafts are also used to treat stenoses in vascular grafts and fistulas used for hemodialysis . (wikipedia.org)
However, stent grafts are made of fabric. (medlineplus.gov)
for example, about which stent grafts they use in their procedures,' she said. (nsf.gov)
Researchers at the University of California, San Diego School of Medicine have documented the safety benefits of aortic stent grafts inserted during minimally invasive surgery to repair abdominal aortic aneurysms - weaknesses in the body's largest artery that can rupture, causing potentially lethal internal bleeding. (ucsd.edu)

This bioabsorbable stent, a polymer made from lactic acid, provides the structural support needed in the artery during and immediately following angioplasty. (uhn.ca)
Bangalore S, Toklu B, Amoroso N, Fusaro M, Kumar S, Hannan EL, Faxon DP, Feit F. Bare metal stents, durable polymer drug eluting stents, and biodegradable polymer drug eluting stents for coronary artery disease: mixed treatment comparison meta-analysis. (springer.com)
This novel microstructured polymer stents are made of a shape memory polymer (e.g. polyurethane). (innovations-report.de)
Below body temperature the shape memory polymer stent has a compressed geometry (temporary form, see left figure). (innovations-report.de)
When heating the shape memory polymer stent on body temperature the stent turns into an uncompressed geometry (predefined permanent form, see right figure). (innovations-report.de)
Therefore the polymer stent is a reliable device for angioplasty procedures. (innovations-report.de)
Orsiro is a cobalt-chromium stent that elutes the drug sirolimus via the Berlin-based company's Biolute bioabsorbable polymer coating. (massdevice.com)
This paper provides evidence for the first time that instances of allergic reactions, presumably to the polymer in the stent, can occur," said study co-author Dr. Charles Bennett , an NMH epidemiologist and oncologist. (upi.com)
They also concluded the polymer coating on the stent itself is the most probable cause of hypersensitivity in the majority of cases, rather than the medications the stent is coated with. (upi.com)
A DES is a combination product consisting of 3 important individual components: the stent, the polymer, and the drug combined together in the finished product. (medscape.com)
The FDA needs information on how the stent performs, which starts with laboratory bench testing of the stent and polymer coating, which may be permanently affixed to the stent or may be intended to degrade over time, as well as some safety information about the drug component. (medscape.com)
Abbott's new bioabsorbable everolimus-eluting stent, or BVS, is made up of two layers of a biodegradable polymer: one that contains the immunosuppressant drug everolimus, the other forming a longer-lasting backbone. (technologyreview.com)

PTCA is now referred to as percutaneous coronary intervention, or PCI, as this term includes the use of balloons, stents, and atherectomy devices. (rxlist.com)
Reason for posting: The use of coronary stents has improved the results of percutaneous coronary revascularization procedures. (cmaj.ca)
The National Coverage Determination (NCD) for Percutaneous Transluminal Angioplasty (PTA) covers carotid artery stenting (CAS) procedures under certain circumstances including through study participation. (cms.gov)
So from a percutaneous approach, the kidney was accessed and through a sheath, the uretural stent was removed using an Amplatz snare. (aapc.com)
The development of stents to treat CAD was a significant innovation, facilitating effective percutaneous coronary revascularization. (mdpi.com)

Aspirin can help decrease the possibility of blood clots forming at the stent. (encyclopedia.com)
Even though stents are designed to be compatible with the human body, they sometimes cause unwanted reactions, such as blood clots and scar tissue formation. (nsf.gov)

Imaged via ultrasound two years after surgery, this artery shows no trace of the bioabsorbable stent used to prop it open. (technologyreview.com)

A stent graft or covered stent is type of vascular stent with a fabric coating that creates a contained tube but is expandable like a bare metal stent . (wikipedia.org)
Through GlobalData's analysis, it is evident that currently the peripheral vascular stent market for the lower extremity is saturated with bare metal stents, followed by covered stents. (prnewswire.com)
Q).As more bioabsorbable stents receive approval, how will new entrants impact the peripheral vascular stent market for the lower extremity? (prnewswire.com)

The authors concluded: "This study shows the feasibility of implantation of the bio-absorbable everolimus-eluting stents. (thaindian.com)
A fixed amount of sirolimus per unit area is applied to the CYPHER stent, which is designed to release about 80% of the drug within 30 days of implantation. (cmaj.ca)
He was an ex-smoker, and his only previous medical history was of an acute coronary syndrome leading to the implantation of a drug-eluting stent (DES) in his proximal left anterior descending artery 3 months before this admission. (ahajournals.org)
The first is the situation in which a patient requires noncardiac surgery and, as a result of a preoperative coronary risk assessment, undergoes an angiogram with subsequent stent implantation before the surgery is scheduled. (ahajournals.org)

Bare-metal stent: This is a stent made of metal that is placed in the artery to help hold it open. (familydoctor.org)

As Ariel Roguin describes in his paper "Stent: The Man and Word Behind the Coronary Metal Prosthesis", the current acceptable origin of the word stent is that it derives from the name of a dentist, Charles Thomas Stent , notable for his advances in the field of denture-making. (wikipedia.org)
Traditional stents are made of metal, which can complicate bypass surgery if the patient needs that in the future. (uhn.ca)
Dr. Dzavik is quick to point out that this does not make metal stents obsolete. (uhn.ca)
Metal stents can save the life of a patient having a heart attack and can stop the angina of a patient with more chronic symptoms. (uhn.ca)
Q).How will adoption of these stent technologies affect adoption of bare metal and covered stents? (prnewswire.com)
The PVS market is currently dominated by bare metal stents, specifically self-expanding nitinol stents. (prnewswire.com)
These are tubular devices made up of special fabric that is supported by a rigid metal stent. (news-medical.net)
These gizmos, called drug-coated stents, worked so much better than plain old metal ones that 6 million people worldwide received them in the few years they have been available. (dailystrength.org)
Many are returning to the old metal stents, and some are fundamentally rethinking when to use stents at all and are considering alternatives like bypass surgery or medications. (dailystrength.org)
Compared with bare metal uncoated stents, DES are associated with a lower rate of repeat revascularization procedures. (medscape.com)
We are confident that the finding of infringement of the Gray patent by the bare-metal Liberte stent will also apply to the drug-eluting version of Liberte, and Cordis will strongly assert its patent claim against it if and when the product is launched," said Nick Valeriani, Worldwide Chairman, Cardiovascular Devices and Diagnostics. (news-medical.net)
I have 8 med stents fully lining in my LCA forming a full metal jacket And two others in a. (medhelp.org)
14. The stent of claim 1 , wherein the stent is formed from a pseudo elastic metal alloy. (google.ca)
Allium's thin-walled, large caliber, self-expanding, fully covered metal stents are unique because they can be left in the body for long periods without being changed and easily removed even after long implant periods. (medgadget.com)
Metal stents have evolved from bare metal devices two decades ago to metal scaffolds in more recent years that are coated in medication to prevent reclogging. (newsday.com)
The CYPHER stent, a metal device that is coated with sirolimus, was approved in April 2003 by the US Food and Drug Administration (FDA) for use in angioplasty procedures. (cmaj.ca)
The national drug price regulator had in February 2018 marginally increased the price of bare metal stents (BES) from ₹ 7,260 to ₹ 7,660, and reduced prices of drug-eluting and biodegradable stents from ₹ 29,600 to ₹ 27,890. (livemint.com)
Bare metal stents sold for as much as ₹ 45,000 and drug-eluting stents cost ₹ 1.21 lakh prior to the imposition of the cap in February 2017. (livemint.com)
But some cardiologists still liken the use of metal stents to leaving a cast in place once a person's broken limb has healed. (technologyreview.com)
Because metal stents have proven to be so effective, some question whether a bioabsorbable version is worth the research investment, especially since the bar to prove both safety and efficacy is set so high, and since there's not yet proof that the disappearing stent doesn't leave scarred tissue in its wake. (technologyreview.com)
A stent is a small rod made out of metal or fabric. (familydoctor.org)
Drug-eluting stent: A drug-eluting stent is a metal stent that is coated in medicine. (familydoctor.org)
Coronary stents have evolved from bare metal compositions, to incorporate advances in pharmacological therapy in what are now known as drug eluting stents (DES). (mdpi.com)
Improved results were observed following the insertion of an additional intravascular mechanical support, cylindrical metal scaffolds known as stents [ 5 ]. (mdpi.com)

There is a wide variety of stents used for different purposes, from expandable coronary , vascular and biliary stents, to simple plastic stents used to allow the flow of urine between kidney and bladder . (wikipedia.org)
Stents may be self-expanding or balloon expandable and can be made from various materials including stainless steel, Elgiloy, tantalum, Nitinol or polymers. (3ds.com)
Today's findings of infringement against the Taxus, Liberte and Express stents - together with previous findings of infringement by Boston Scientific's NIR stent - reinforces the strength of Cordis' deep patent estate on balloon expandable stents. (news-medical.net)
The composite device includes an elongate radially expandable tubular stent having an interior luminal surface and an opposed exterior surface extending along a longitudinal stent axis. (google.co.uk)
A stent cover is formed of unsintered ePTFE which is expandable. (google.co.uk)
2. A composite intraluminal device of claim 1 wherein said stent is radially expandable from a first compressed state permitting intraluminal delivery to a second expanded state permitting intraluminal deployment. (google.co.uk)
The invention is directed to an expandable stent for implanting in a body lumen, such as a coronary artery, peripheral artery, or other body lumen. (google.ca)
created a balloon-expandable stent that is currently used. (wikipedia.org)
Shortly thereafter, in 1987, Julio Palmaz (known for patenting a balloon-expandable stent ) and Richard Schatz implanted their similar stent into a patient in Germany. (wikipedia.org)

The stent is almost always coated with a drug (called a drug-eluting stent). (medlineplus.gov)

c) after said coiled spring has cooled sufficiently, reversing the winding direction of said coiled spring to form the stent. (google.com)

The Global Intracranial Stents Industry 2017 Market Research Report is a professional and in-depth study on the current state of the Intracranial Stents industry. (mynewsdesk.com)

The stent is left there to help keep the artery open. (medlineplus.gov)
A cardiac angiography will follow to ensure that the stent is keeping the artery open. (encyclopedia.com)
A stent will help hold the artery open so blood can flow. (familydoctor.org)

Stents are implanted devices used to prop open various types of body passageways such as blood vessels, bile ducts, urinary tracts and even the esophagus. (3ds.com)
Stents are used to open blockages in a tubule structure. (yahoo.com)
The stent holds the structure open. (medlineplus.gov)
A urinary stent is used to hold the ureter open in cases where it has narrowed. (news-medical.net)
This stent is used to open up the narrowing caused by an enlarged prostate pushing against a man's urethra and preventing the normal outflow of urine. (news-medical.net)
The stent helps to keep the urethra open so that urine can flow from the bladder out of the body. (news-medical.net)
Stents can also be used to keep the food pipe of the esophagus open in case of esophageal constriction and biliary stents can be used to maintain adequate drainage of bile into the intestine. (news-medical.net)
Their stents are still fully open. (medhelp.org)
wherein a first end of each leaflet is attached to a commissure wire in the central stent region and a second end of each leaflet is attached to an adjacent commissure wire in the central stent region so that the free edge of each leaflet does not contact the structural wires in the central stent region when the valve is in an open position. (freepatentsonline.com)
The stent increases blood flow from the leg by holding the iliofemoral vein wall open. (fda.gov)
After careful positioning, your doctor will open the stent to cover the plaque. (bcm.edu)
Whether conventional or biodegradable, stents prop open blood vessels to restore blood flow, providing relief from blockages caused by biological goo - plaque that has collected over years. (newsday.com)
After you return home, you'll need to take medicine that keeps the stent open and blood flowing. (familydoctor.org)
Stents, like the one pictured here, are then put in place to keep the new passageways open in the lungs. (eurekalert.org)
UroPass II Open Tip Ureteral Stents have all the advantages and benefits of the UroPass. (bio-medicine.org)
According to the author, from the use of Stent's compound as a support for facial tissues evolved the use of a stent to hold open various body structures. (wikipedia.org)

Because of the external compression and mechanical forces subjected to these locations, flexible stent materials such as nitinol are used in a majority of peripheral stent placements. (wikipedia.org)

A stent can cause the body to react defensively, creating mucous build-up, inflammation of surrounding tissues and organs, narrowing of the blood vessels around it (stenosis), abnormal tissue build-up and infection. (ehow.co.uk)
Using their simplified model, the researchers have examined the designs of several stents on the market to see which structures seem to be best for specific blood vessels or procedures. (nsf.gov)
The team believes this easy-to-harvest tissue will make stents more biocompatible, though they don't yet know how ear cartilage cells grow or behave in environments like human blood vessels. (nsf.gov)
Your doctor will insert the Carotid Stent System through the vessels to the area of the plaque. (bcm.edu)
2. Use stents in previously untreated vessels only. (cmaj.ca)
Stents have been used to treat blocked coronary vessels for some time now, but the urinary tract in foetuses is much narrower in comparison. (eurekalert.org)

Ureteral stents are used to ensure the patency of a ureter , which may be compromised, for example, by a kidney stone . (wikipedia.org)
There is a kidney stone in the pyelum of the lower pole of the kidney (higher red arrow) and one in the ureter beside the stent (lower red arrow). (wikipedia.org)
In many cases these tumors are inoperable and the stents are used to ensure drainage of urine through the ureter. (wikipedia.org)
A urinary stent can be placed inside the ureter to allow the urine to flow out. (news-medical.net)

Conventional stenting has already changed the treatment of cardiovascular disease worldwide over the past two decades and in this country has led to the expansion of hospital cardiology departments and the specialty of interventional cardiology. (newsday.com)
Three interventional cardiologists -- doctors who insert stents -- have been convicted of federal fraud charges related to unnecessary stents and sentenced to prison since 2008. (bloomberg.com)
It really looks like the stent did its job of stopping re-narrowing, it was safe, and it disappeared," says John Ormiston , lead researcher of the Lancet study and an interventional cardiologist at Mercy and Auckland City Hospitals in New Zealand. (technologyreview.com)
It's a very humbling study for someone who puts in stents," said Dr. Brahmajee K. Nallamothu, an interventional cardiologist at the University of Michigan. (tampabay.com)
Depending on the severity of the disease, the main interventional options for revascularisation include angioplasty, stent deployment and in severe, diffuse occlusions (more than 70%), bypass graft surgery [ 3 ]. (mdpi.com)
Bioresorbable stent Bronchoscopy Colonoscopy Esophagogastroduodenoscopy Grommet Interventional radiology Health, Center for Devices and Radiological. (wikipedia.org)

18. The stent of claim 1 , wherein the body has a tubular configuration. (google.com)
The stented valve further includes a valve structure attached within the generally tubular portion. (freepatentsonline.com)
The stent has a tubular shape to fit the common bile duct anatomy combined with a specially designed proprietary element on its ends to minimize reactive tissue proliferation. (medgadget.com)

Covered stents are used in endovascular surgical procedures such as endovascular aneurysm repair . (wikipedia.org)
Peripheral stents are main devices used in endovascular treatment for peripheral vascular diseases. (springer.com)
Endovascular therapies such as stenting have been widely adopted to treat peripheral artery disease in the lower extremity. (prnewswire.com)

Reflow Medical announced yesterday that its Temporary Spur Stent system for treating below-the-knee peripheral artery disease (PAD) won FDA breakthrough device designation. (massdevice.com)

Stenting or CABG is determined by the number of blockages, the severity and their location(s). (yahoo.com)
If blockages are found and stents are needed, it will normally be done at that time. (yahoo.com)
My husband had the same stenting, and it is very rare to develop blockages in this area, but obviously it happens. (medhelp.org)
So I suppose in the majority of people, stents won't be harmed by smoking, but 'research' tells us it will cause other blockages elsewhere. (medhelp.org)

Mao H., Bao J., Liu G. (2018) Peripheral Stent. (springer.com)

Stents are beneficial in such cases, most cardiologists agree. (bloomberg.com)

Guidant (NYSE:GDT) and Medtronic (NYSE:MDT) are also developing drug-coated stents for possible 2005 introduction. (fool.com)

Reuters Health) - For people with type 2 diabetes, maintaining good blood sugar control in the years after receiving a coronary artery stent is associated with a lower risk of heart attack and stroke, according to a recent study. (reuters.com)

Dr. Rabbe was reporting an interim analysis of the Carotid Artery Stenting with Protection Study, which was intended to see whether using the neuroprotective device -- essentially a small net inserted above the stent to keep fragments of plaque from getting to the brain -- would prevent cognitive impairment. (medpagetoday.com)

Anatomy8

Organisms2

Diseases30

Chemicals and Drugs21

Analytical, Diagnostic and Therapeutic Techniques and Equipment49

Phenomena and Processes4

Disciplines and Occupations1

Technology, Industry, Agriculture9

Information Science1

Health Care15

PlA polymorphism of platelet glycoprotein IIIa and risk of restenosis after coronary stent placement. (1/7427)

In-stent neointimal proliferation correlates with the amount of residual plaque burden outside the stent: an intravascular ultrasound study. (2/7427)

Comparison of quantitative coronary angiography, intravascular ultrasound, and coronary pressure measurement to assess optimum stent deployment. (3/7427)

The endovascular management of blue finger syndrome. (4/7427)

Balloon-artery interactions during stent placement: a finite element analysis approach to pressure, compliance, and stent design as contributors to vascular injury. (5/7427)

Surgical transluminal iliac angioplasty with selective stenting: long-term results assessed by means of duplex scanning. (6/7427)

Relief of obstructive pelvic venous symptoms with endoluminal stenting. (7/7427)

Endovascular repair of a descending thoracic aortic aneurysm: a tip for systemic pressure reduction. (8/7427)

No images available that match "stents"

Stents

Drug-Eluting Stents

Coronary Restenosis

Sirolimus

Angioplasty, Balloon, Coronary

Prosthesis Design

Metals

Alloys

Coated Materials, Biocompatible

Paclitaxel

Coronary Thrombosis

Treatment Outcome

Cardiovascular Agents

Coronary Angiography

Coronary Stenosis

Coronary Artery Disease

Absorbable Implants

Coronary Vessels

Follow-Up Studies

Thrombosis

Ultrasonography, Interventional

Graft Occlusion, Vascular

Stainless Steel

Drug Implants

Tubulin Modulators

Angioplasty, Balloon

Constriction, Pathologic

Myocardial Infarction

Immunosuppressive Agents

Neointima

Iliac Artery

Platelet Aggregation Inhibitors

Tunica Intima

Percutaneous Coronary Intervention

Chromium Alloys

Polymers

Time Factors

Equipment Design

Retreatment

Blood Vessel Prosthesis

Blood Vessel Prosthesis Implantation

Hyperplasia

Coronary Disease

Vascular Patency

Registries

Myocardial Revascularization

Tracheal Stenosis

Esophageal Stenosis

Recurrence

Retrospective Studies

Drug Delivery Systems

Prosthesis Failure

Catheterization

Angioplasty

Ticlopidine

Prospective Studies

Kaplan-Meier Estimate

Arterial Occlusive Diseases

Foreign-Body Migration

Plastics

Prosthesis Implantation

Equipment Failure

Coronary Occlusion

Randomized Controlled Trials as Topic

Palliative Care

Gastric Outlet Obstruction

Swine

Device Removal

Risk Assessment

Aspirin

Femoral Artery

Polytetrafluoroethylene

Swine, Miniature

Angiography

Coronary Artery Bypass

Risk Factors

Foreign-Body Reaction

Intubation

Ureteral Diseases

Angioscopy