Arteriovenous Fistula: An abnormal direct communication between an artery and a vein without passing through the CAPILLARIES. An A-V fistula usually leads to the formation of a dilated sac-like connection, arteriovenous aneurysm. The locations and size of the shunts determine the degree of effects on the cardiovascular functions such as BLOOD PRESSURE and HEART RATE.Arteriovenous Shunt, Surgical: Surgical shunt allowing direct passage of blood from an artery to a vein. (From Dorland, 28th ed)Fistula: Abnormal communication most commonly seen between two internal organs, or between an internal organ and the surface of the body.Central Nervous System Vascular Malformations: Congenital, inherited, or acquired abnormalities involving ARTERIES; VEINS; or venous sinuses in the BRAIN; SPINAL CORD; and MENINGES.Intestinal Fistula: An abnormal anatomical passage between the INTESTINE, and another segment of the intestine or other organs. External intestinal fistula is connected to the SKIN (enterocutaneous fistula). Internal intestinal fistula can be connected to a number of organs, such as STOMACH (gastrocolic fistula), the BILIARY TRACT (cholecystoduodenal fistula), or the URINARY BLADDER of the URINARY TRACT (colovesical fistula). Risk factors include inflammatory processes, cancer, radiation treatment, and surgical misadventures (MEDICAL ERRORS).Dura Mater: The outermost of the three MENINGES, a fibrous membrane of connective tissue that covers the brain and the spinal cord.Embolization, Therapeutic: A method of hemostasis utilizing various agents such as Gelfoam, silastic, metal, glass, or plastic pellets, autologous clot, fat, and muscle as emboli. It has been used in the treatment of spinal cord and INTRACRANIAL ARTERIOVENOUS MALFORMATIONS, renal arteriovenous fistulas, gastrointestinal bleeding, epistaxis, hypersplenism, certain highly vascular tumors, traumatic rupture of blood vessels, and control of operative hemorrhage.Cutaneous Fistula: An abnormal passage or communication leading from an internal organ to the surface of the body.Cranial Sinuses: Large endothelium-lined venous channels situated between the two layers of DURA MATER, the endosteal and the meningeal layers. They are devoid of valves and are parts of the venous system of dura mater. Major cranial sinuses include a postero-superior group (such as superior sagittal, inferior sagittal, straight, transverse, and occipital) and an antero-inferior group (such as cavernous, petrosal, and basilar plexus).Bronchial Fistula: An abnormal passage or communication between a bronchus and another part of the body.Vascular Fistula: An abnormal passage between two or more BLOOD VESSELS, between ARTERIES; VEINS; or between an artery and a vein.Rectal Fistula: An abnormal anatomical passage connecting the RECTUM to the outside, with an orifice at the site of drainage.Renal Dialysis: Therapy for the insufficient cleansing of the BLOOD by the kidneys based on dialysis and including hemodialysis, PERITONEAL DIALYSIS, and HEMODIAFILTRATION.Gastric Fistula: Abnormal passage communicating with the STOMACH.Urinary Fistula: An abnormal passage in any part of the URINARY TRACT between itself or with other organs.Cavernous Sinus: An irregularly shaped venous space in the dura mater at either side of the sphenoid bone.Esophageal Fistula: Abnormal passage communicating with the ESOPHAGUS. The most common type is TRACHEOESOPHAGEAL FISTULA between the esophagus and the TRACHEA.Cerebral Veins: Veins draining the cerebrum.Biliary Fistula: Abnormal passage in any organ of the biliary tract or between biliary organs and other organs.Veins: The vessels carrying blood away from the capillary beds.Vascular Patency: The degree to which BLOOD VESSELS are not blocked or obstructed.Pancreatic Fistula: Abnormal passage communicating with the PANCREAS.Rectovaginal Fistula: An abnormal anatomical passage between the RECTUM and the VAGINA.PolyvinylsAngiography: Radiography of blood vessels after injection of a contrast medium.Vesicovaginal Fistula: An abnormal anatomical passage between the URINARY BLADDER and the VAGINA.Respiratory Tract Fistula: An abnormal passage communicating between any component of the respiratory tract or between any part of the respiratory system and surrounding organs.Vaginal Fistula: An abnormal anatomical passage that connects the VAGINA to other organs, such as the bladder (VESICOVAGINAL FISTULA) or the rectum (RECTOVAGINAL FISTULA).Meningeal Arteries: Arteries which supply the dura mater.Cerebral Angiography: Radiography of the vascular system of the brain after injection of a contrast medium.Tracheoesophageal Fistula: Abnormal passage between the ESOPHAGUS and the TRACHEA, acquired or congenital, often associated with ESOPHAGEAL ATRESIA.Cranial Fossa, Anterior: The compartment containing the inferior part and anterior extremities of the frontal lobes (FRONTAL LOBE) of the cerebral hemispheres. It is formed mainly by orbital parts of the FRONTAL BONE and the lesser wings of the SPHENOID BONE.Catheters, Indwelling: Catheters designed to be left within an organ or passage for an extended period of time.Wounds, Stab: Penetrating wounds caused by a pointed object.Arteriovenous Malformations: Abnormal formation of blood vessels that shunt arterial blood directly into veins without passing through the CAPILLARIES. They usually are crooked, dilated, and with thick vessel walls. A common type is the congenital arteriovenous fistula. The lack of blood flow and oxygen in the capillaries can lead to tissue damage in the affected areas.Femoral Vein: The vein accompanying the femoral artery in the same sheath; it is a continuation of the popliteal vein and becomes the external iliac vein.Intracranial Arteriovenous Malformations: Congenital vascular anomalies in the brain characterized by direct communication between an artery and a vein without passing through the CAPILLARIES. The locations and size of the shunts determine the symptoms including HEADACHES; SEIZURES; STROKE; INTRACRANIAL HEMORRHAGES; mass effect; and vascular steal effect.Iliac Vein: 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.Jugular Veins: Veins in the neck which drain the brain, face, and neck into the brachiocephalic or subclavian veins.Radial Artery: The direct continuation of the brachial trunk, originating at the bifurcation of the brachial artery opposite the neck of the radius. Its branches may be divided into three groups corresponding to the three regions in which the vessel is situated, the forearm, wrist, and hand.Urinary Bladder Fistula: An abnormal passage in the URINARY BLADDER or between the bladder and any surrounding organ.Upper Extremity: The region of the upper limb in animals, extending from the deltoid region to the HAND, and including the ARM; AXILLA; and SHOULDER.Arterio-Arterial Fistula: Abnormal communication between two ARTERIES that may result from injury or occur as a congenital abnormality.Superior Sagittal Sinus: The long large endothelium-lined venous channel on the top outer surface of the brain. It receives blood from a vein in the nasal cavity, runs backwards, and gradually increases in size as blood drains from veins of the brain and the DURA MATER. Near the lower back of the CRANIUM, the superior sagittal sinus deviates to one side (usually the right) and continues on as one of the TRANSVERSE SINUSES.Treatment Outcome: 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.Graft Occlusion, Vascular: Obstruction of flow in biological or prosthetic vascular grafts.Polytetrafluoroethylene: 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.Kidney Failure, Chronic: The end-stage of CHRONIC RENAL INSUFFICIENCY. It is characterized by the severe irreversible kidney damage (as measured by the level of PROTEINURIA) and the reduction in GLOMERULAR FILTRATION RATE to less than 15 ml per min (Kidney Foundation: Kidney Disease Outcome Quality Initiative, 2002). These patients generally require HEMODIALYSIS or KIDNEY TRANSPLANTATION.Axillary Vein: The venous trunk of the upper limb; a continuation of the basilar and brachial veins running from the lower border of the teres major muscle to the outer border of the first rib where it becomes the subclavian vein.Wounds, Gunshot: Disruption of structural continuity of the body as a result of the discharge of firearms.Transverse Sinuses: The two large endothelium-lined venous channels that begin at the internal occipital protuberance at the back and lower part of the CRANIUM and travels laterally and forward ending in the internal jugular vein (JUGULAR VEINS). One of the transverse sinuses, usually the right one, is the continuation of the SUPERIOR SAGITTAL SINUS. The other transverse sinus is the continuation of the straight sinus.Magnetic Resonance Angiography: Non-invasive method of vascular imaging and determination of internal anatomy without injection of contrast media or radiation exposure. The technique is used especially in CEREBRAL ANGIOGRAPHY as well as for studies of other vascular structures.Vertebral Artery: The first branch of the SUBCLAVIAN ARTERY with distribution to muscles of the NECK; VERTEBRAE; SPINAL CORD; CEREBELLUM; and interior of the CEREBRUM.Spinal Cord Diseases: Pathologic conditions which feature SPINAL CORD damage or dysfunction, including disorders involving the meninges and perimeningeal spaces surrounding the spinal cord. Traumatic injuries, vascular diseases, infections, and inflammatory/autoimmune processes may affect the spinal cord.Blood Vessel Prosthesis: Device constructed of either synthetic or biological material that is used for the repair of injured or diseased blood vessels.Tomography, X-Ray Computed: Tomography using x-ray transmission and a computer algorithm to reconstruct the image.Aneurysm: Pathological outpouching or sac-like dilatation in the wall of any blood vessel (ARTERIES or VEINS) or the heart (HEART ANEURYSM). It indicates a thin and weakened area in the wall which may later rupture. Aneurysms are classified by location, etiology, or other characteristics.Femoral Artery: The main artery of the thigh, a continuation of the external iliac artery.Constriction, Pathologic: The condition of an anatomical structure's being constricted beyond normal dimensions.Coronary Vessel Anomalies: Malformations of CORONARY VESSELS, either arteries or veins. Included are anomalous origins of coronary arteries; ARTERIOVENOUS FISTULA; CORONARY ANEURYSM; MYOCARDIAL BRIDGING; and others.Aneurysm, False: Not an aneurysm but a well-defined collection of blood and CONNECTIVE TISSUE outside the wall of a blood vessel or the heart. It is the containment of a ruptured blood vessel or heart, such as sealing a rupture of the left ventricle. False aneurysm is formed by organized THROMBUS and HEMATOMA in surrounding tissue.Arm: The superior part of the upper extremity between the SHOULDER and the ELBOW.Subclavian Vein: The continuation of the axillary vein which follows the subclavian artery and then joins the internal jugular vein to form the brachiocephalic vein.Venous Pressure: The blood pressure in the VEINS. It is usually measured to assess the filling PRESSURE to the HEART VENTRICLE.Angiography, Digital Subtraction: A method of delineating blood vessels by subtracting a tissue background image from an image of tissue plus intravascular contrast material that attenuates the X-ray photons. The background image is determined from a digitized image taken a few moments before injection of the contrast material. The resulting angiogram is a high-contrast image of the vessel. This subtraction technique allows extraction of a high-intensity signal from the superimposed background information. The image is thus the result of the differential absorption of X-rays by different tissues.Iatrogenic Disease: Any adverse condition in a patient occurring as the result of treatment by a physician, surgeon, or other health professional, especially infections acquired by a patient during the course of treatment.Ultrasonography, Doppler, Duplex: Ultrasonography applying the Doppler effect combined with real-time imaging. The real-time image is created by rapid movement of the ultrasound beam. A powerful advantage of this technique is the ability to estimate the velocity of flow from the Doppler shift frequency.Phlebography: Radiographic visualization or recording of a vein after the injection of contrast medium.Blood Vessel Prosthesis Implantation: Surgical insertion of BLOOD VESSEL PROSTHESES to repair injured or diseased blood vessels.Iliac Artery: Either of two large arteries originating from the abdominal aorta; they supply blood to the pelvis, abdominal wall and legs.Ultrasonography, Doppler, Color: Ultrasonography applying the Doppler effect, with the superposition of flow information as colors on a gray scale in a real-time image. This type of ultrasonography is well-suited to identifying the location of high-velocity flow (such as in a stenosis) or of mapping the extent of flow in a certain region.Brachial Artery: The continuation of the axillary artery; it branches into the radial and ulnar arteries.Splenic Vein: Vein formed by the union (at the hilus of the spleen) of several small veins from the stomach, pancreas, spleen and mesentery.Retrospective Studies: 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.Enbucrilate: A tissue adhesive that is applied as a monomer to moist tissue and polymerizes to form a bond. It is slowly biodegradable and used in all kinds of surgery, including dental.Vena Cava, Inferior: The venous trunk which receives blood from the lower extremities and from the pelvic and abdominal organs.Hematemesis: Vomiting of blood that is either fresh bright red, or older "coffee-ground" in character. It generally indicates bleeding of the UPPER GASTROINTESTINAL TRACT.Digestive System Fistula: An abnormal passage communicating between any components of the digestive system, or between any part of the digestive system and surrounding organ(s).Myelography: X-ray visualization of the spinal cord following injection of contrast medium into the spinal arachnoid space.Forearm: Part of the arm in humans and primates extending from the ELBOW to the WRIST.Reoperation: A repeat operation for the same condition in the same patient due to disease progression or recurrence, or as followup to failed previous surgery.Splenic Artery: The largest branch of the celiac trunk with distribution to the spleen, pancreas, stomach and greater omentum.Ulnar Artery: The larger of the two terminal branches of the brachial artery, beginning about one centimeter distal to the bend of the elbow. Like the RADIAL ARTERY, its branches may be divided into three groups corresponding to their locations in the forearm, wrist, and hand.Thrombosis: Formation and development of a thrombus or blood clot in the blood vessel.Radiography, Interventional: 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.Wound Closure Techniques: Methods to repair breaks in tissue caused by trauma or to close surgical incisions.Pleural DiseasesVascular Surgical Procedures: Operative procedures for the treatment of vascular disorders.Spinal Cord: A cylindrical column of tissue that lies within the vertebral canal. It is composed of WHITE MATTER and GRAY MATTER.Pia Mater: The innermost layer of the three meninges covering the brain and spinal cord. It is the fine vascular membrane that lies under the ARACHNOID and the DURA MATER.Tinnitus: A nonspecific symptom of hearing disorder characterized by the sensation of buzzing, ringing, clicking, pulsations, and other noises in the ear. Objective tinnitus refers to noises generated from within the ear or adjacent structures that can be heard by other individuals. The term subjective tinnitus is used when the sound is audible only to the affected individual. Tinnitus may occur as a manifestation of COCHLEAR DISEASES; VESTIBULOCOCHLEAR NERVE DISEASES; INTRACRANIAL HYPERTENSION; CRANIOCEREBRAL TRAUMA; and other conditions.Treatment Failure: A measure of the quality of health care by assessment of unsuccessful results of management and procedures used in combating disease, in individual cases or series.Oral Fistula: An abnormal passage within the mouth communicating between two or more anatomical structures.Regional Blood Flow: The flow of BLOOD through or around an organ or region of the body.Follow-Up Studies: 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.Pulmonary Veins: The veins that return the oxygenated blood from the lungs to the left atrium of the heart.Dimethyl Sulfoxide: A highly polar organic liquid, that is used widely as a chemical solvent. Because of its ability to penetrate biological membranes, it is used as a vehicle for topical application of pharmaceuticals. It is also used to protect tissue during CRYOPRESERVATION. Dimethyl sulfoxide shows a range of pharmacological activity including analgesia and anti-inflammation.Time Factors: Elements of limited time intervals, contributing to particular results or situations.Paraparesis: Mild to moderate loss of bilateral lower extremity motor function, which may be a manifestation of SPINAL CORD DISEASES; PERIPHERAL NERVOUS SYSTEM DISEASES; MUSCULAR DISEASES; INTRACRANIAL HYPERTENSION; parasagittal brain lesions; and other conditions.Renal Veins: Short thick veins which return blood from the kidneys to the vena cava.Catheterization: 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.Remission, Spontaneous: A spontaneous diminution or abatement of a disease over time, without formal treatment.Neurologic Examination: Assessment of sensory and motor responses and reflexes that is used to determine impairment of the nervous system.Arteriovenous Anastomosis: A vessel that directly interconnects an artery and a vein, and that acts as a shunt to bypass the capillary bed. Not to be confused with surgical anastomosis, nor with arteriovenous fistula.Pulmonary Artery: The short wide vessel arising from the conus arteriosus of the right ventricle and conveying unaerated blood to the lungs.Melena: The black, tarry, foul-smelling FECES that contain degraded blood.Cranial Fossa, Middle: The compartment containing the anterior extremities and half the inferior surface of the temporal lobes (TEMPORAL LOBE) of the cerebral hemispheres. Lying posterior and inferior to the anterior cranial fossa (CRANIAL FOSSA, ANTERIOR), it is formed by part of the TEMPORAL BONE and SPHENOID BONE. It is separated from the posterior cranial fossa (CRANIAL FOSSA, POSTERIOR) by crests formed by the superior borders of the petrous parts of the temporal bones.Postoperative Complications: 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.Magnetic Resonance Imaging: Non-invasive method of demonstrating internal anatomy based on the principle that atomic nuclei in a strong magnetic field absorb pulses of radiofrequency energy and emit them as radiowaves which can be reconstructed into computerized images. The concept includes proton spin tomographic techniques.Arteries: The vessels carrying blood away from the heart.Subclavian Artery: Artery arising from the brachiocephalic trunk on the right side and from the arch of the aorta on the left side. It distributes to the neck, thoracic wall, spinal cord, brain, meninges, and upper limb.Tissue Adhesives: Substances used to cause adherence of tissue to tissue or tissue to non-tissue surfaces, as for prostheses.Occipital Bone: Part of the back and base of the CRANIUM that encloses the FORAMEN MAGNUM.Vascular System Injuries: Injuries to blood vessels caused by laceration, contusion, puncture, or crush and other types of injuries. Symptoms vary by site and mode of injuries and may include bleeding, bruising, swelling, pain, and numbness. It does not include injuries secondary to pathologic function or diseases such as ATHEROSCLEROSIS.Mesenteric Veins: Veins which return blood from the intestines; the inferior mesenteric vein empties into the splenic vein, the superior mesenteric vein joins the splenic vein to form the portal vein.Sinus Thrombosis, Intracranial: Formation or presence of a blood clot (THROMBUS) in the CRANIAL SINUSES, large endothelium-lined venous channels situated within the SKULL. Intracranial sinuses, also called cranial venous sinuses, include the superior sagittal, cavernous, lateral, petrous sinuses, and many others. Cranial sinus thrombosis can lead to severe HEADACHE; SEIZURE; and other neurological defects.Punctures: Incision of tissues for injection of medication or for other diagnostic or therapeutic procedures. Punctures of the skin, for example may be used for diagnostic drainage; of blood vessels for diagnostic imaging procedures.Telangiectasia, Hereditary Hemorrhagic: An autosomal dominant vascular anomaly characterized by telangiectases of the skin and mucous membranes and by recurrent gastrointestinal bleeding. This disorder is caused by mutations of a gene (on chromosome 9q3) which encodes endoglin, a membrane glycoprotein that binds TRANSFORMING GROWTH FACTOR BETA.Blood Flow Velocity: A value equal to the total volume flow divided by the cross-sectional area of the vascular bed.Cranial Nerve Diseases: Disorders of one or more of the twelve cranial nerves. With the exception of the optic and olfactory nerves, this includes disorders of the brain stem nuclei from which the cranial nerves originate or terminate.Ischemia: A hypoperfusion of the BLOOD through an organ or tissue caused by a PATHOLOGIC CONSTRICTION or obstruction of its BLOOD VESSELS, or an absence of BLOOD CIRCULATION.Popliteal Vein: The vein formed by the union of the anterior and posterior tibial veins; it courses through the popliteal space and becomes the femoral vein.Aneurysm, Ruptured: The tearing or bursting of the weakened wall of the aneurysmal sac, usually heralded by sudden worsening pain. The great danger of a ruptured aneurysm is the large amount of blood spilling into the surrounding tissues and cavities, causing HEMORRHAGIC SHOCK.Drainage: The removal of fluids or discharges from the body, such as from a wound, sore, or cavity.Neurosurgical Procedures: Surgery performed on the nervous system or its parts.Skull Base: The inferior region of the skull consisting of an internal (cerebral), and an external (basilar) surface.Subarachnoid Hemorrhage: Bleeding into the intracranial or spinal SUBARACHNOID SPACE, most resulting from INTRACRANIAL ANEURYSM rupture. It can occur after traumatic injuries (SUBARACHNOID HEMORRHAGE, TRAUMATIC). Clinical features include HEADACHE; NAUSEA; VOMITING, nuchal rigidity, variable neurological deficits and reduced mental status.Duodenal Diseases: Pathological conditions in the DUODENUM region of the small intestine (INTESTINE, SMALL).Prospective Studies: 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.Saphenous Vein: The vein which drains the foot and leg.Central Venous Catheters: Catheters that are inserted into a large central vein such as a SUBCLAVIAN VEIN or FEMORAL VEIN.Hemostatics: Agents acting to arrest the flow of blood. Absorbable hemostatics arrest bleeding either by the formation of an artificial clot or by providing a mechanical matrix that facilitates clotting when applied directly to the bleeding surface. These agents function more at the capillary level and are not effective at stemming arterial or venous bleeding under any significant intravascular pressure.Iliac Aneurysm: Abnormal balloon- or sac-like dilatation in the wall of any one of the iliac arteries including the common, the internal, or the external ILIAC ARTERY.Stents: Devices that provide support for tubular structures that are being anastomosed or for body cavities during skin grafting.Wounds, Penetrating: Wounds caused by objects penetrating the skin.Endovascular Procedures: 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.Neck: The part of a human or animal body connecting the HEAD to the rest of the body.Cerebral Hemorrhage: Bleeding into one or both CEREBRAL HEMISPHERES including the BASAL GANGLIA and the CEREBRAL CORTEX. It is often associated with HYPERTENSION and CRANIOCEREBRAL TRAUMA.Popliteal Artery: The continuation of the femoral artery coursing through the popliteal fossa; it divides into the anterior and posterior tibial arteries.Urethral Diseases: Pathological processes involving the URETHRA.Leg: The inferior part of the lower extremity between the KNEE and the ANKLE.Esophageal Atresia: Congenital abnormality characterized by the lack of full development of the ESOPHAGUS that commonly occurs with TRACHEOESOPHAGEAL FISTULA. Symptoms include excessive SALIVATION; GAGGING; CYANOSIS; and DYSPNEA.Ligation: Application of a ligature to tie a vessel or strangulate a part.Preoperative Care: Care given during the period prior to undergoing surgery when psychological and physical preparations are made according to the special needs of the individual patient. This period spans the time between admission to the hospital to the time the surgery begins. (From Dictionary of Health Services Management, 2d ed)Therapeutic Occlusion: Methods used to temporarily or permanently block the flow of BODY FLUIDS through various ducts and tubules throughout the body, including BLOOD VESSELS and LYMPHATIC VESSELS such as by THERAPEUTIC EMBOLIZATION or LIGATION.Wrist: The region of the upper limb between the metacarpus and the FOREARM.Cervical Vertebrae: The first seven VERTEBRAE of the SPINAL COLUMN, which correspond to the VERTEBRAE of the NECK.Microsurgery: The performance of surgical procedures with the aid of a microscope.Mesenteric Artery, Inferior: The artery supplying nearly all the left half of the transverse colon, the whole of the descending colon, the sigmoid colon, and the greater part of the rectum. It is smaller than the superior mesenteric artery (MESENTERIC ARTERY, SUPERIOR) and arises from the aorta above its bifurcation into the common iliac arteries.Oroantral Fistula: A fistula between the maxillary sinus and the oral cavity.Coronary Aneurysm: Abnormal balloon- or sac-like dilatation in the wall of CORONARY VESSELS. Most coronary aneurysms are due to CORONARY ATHEROSCLEROSIS, and the rest are due to inflammatory diseases, such as KAWASAKI DISEASE.Intracranial Hypertension: Increased pressure within the cranial vault. This may result from several conditions, including HYDROCEPHALUS; BRAIN EDEMA; intracranial masses; severe systemic HYPERTENSION; PSEUDOTUMOR CEREBRI; and other disorders.Catheterization, Peripheral: Insertion of a catheter into a peripheral artery, vein, or airway for diagnostic or therapeutic purposes.Polyethylene Terephthalates: Polyester polymers formed from terephthalic acid or its esters and ethylene glycol. They can be formed into tapes, films or pulled into fibers that are pressed into meshes or woven into fabrics.Surgical Instruments: Hand-held tools or implements used by health professionals for the performance of surgical tasks.

Acute renal impairment due to a primary aortocaval fistula is normalised after a successful operation. (1/638)

OBJECTIVES: To study renal function in patients with aortocaval fistula, before and after surgery. DESIGN: Retrospective study. MATERIAL AND METHODS: During the last 22 years nine male patients (median age 67, age range 50-72) with spontaneous aortocaval fistula in combination with AAA were operated upon. This constitutes 4% of the patients with ruptured AAA and 1.5% of all patients with AAA. RESULTS: A preoperative diagnosis of aortocaval fistula was established in three of the nine cases. The medium duration of symptoms prior to surgery was 5 days (range 4 h-14 days). The fistula was combined with an extravasating ruptured AAA in only three patients. Seven of the patients had acute renal insufficiency, with creatinine levels of in median 292 mumol (IQR 218-342). Creatinine declined to 172 mumol/l (IQR 170-313) on the fifth postoperative day in uncomplicated cases and to 86 mumol at discharge. One patient died due to multi-organ failure, whereas the other left hospital well and alive with normal renal function. CONCLUSION: Acute preoperative renal insufficiency due to an aortocaval fistula in patients with AAA is often due to venous congestion, and is normalised after successful surgery.  (+info)

In vitro models of intracranial arteriovenous fistulas for the evaluation of new endovascular treatment materials. (2/638)

BACKGROUND AND PURPOSE: The purpose of this study was to create and test an in vitro model of intracranial arteriovenous fistulas (AVFs) that simulates the geometry of human vasculature and allows realistic testing of devices used in endovascular therapy. METHODS: The models were derived from corrosion casts of the main cervicocranial arteries and veins obtained from two nonfixed human specimens. Wax copies of the casts were produced and combined to create complex models simulating various types of intracranial AVFs. Wax assemblies were embedded with liquid silicone solidified into transparent blocks containing, after wax evacuation, hollow reproductions of the original vascular trees. The models were connected to a pulsatile pump and their compatibility with various imaging techniques and endovascular treatment materials was evaluated. RESULTS: The models were compatible with digital subtraction angiography, CT, MR imaging, and transcranial Doppler sonography. They provided a realistic endovascular environment for the simulation of interventional neuroradiologic procedures. CONCLUSION: Anatomically accurate and reproducible in vitro models of intracranial AVFs provide a valuable method for evaluating new endovascular treatment materials and for teaching purposes.  (+info)

Dural arteriovenous fistula of the cervical spine presenting with subarachnoid hemorrhage. (3/638)

We describe a case of dural arteriovenous fistula (DAVF) presenting with subarachnoid hemorrhage (SAH). The diagnosis of DAVF was based on spinal angiography. A review of the literature revealed that five of 13 previously reported DAVFs of the cervical spine were accompanied by SAH. SAH has not been observed in DAVFs involving other segments of the spinal canal.  (+info)

Atypical pulmonary artery sling with diffuse-type pulmonary arteriovenous fistula. (4/638)

The case of a cyanotic infant with a rare combination of atypical pulmonary artery sling, imperforate anus, absence of the left kidney, interruption of the inferior vena cava, left side hemihypertrophy and diffuse-type pulmonary arteriovenous fistula is described. The clinical features were confusing, because of compounding abnormalities involving the respiratory tract and pulmonary circulation. The diagnostic approach to the etiology of cyanosis is discussed and the embryonic origin of pulmonary artery sling is reviewed.  (+info)

Early prenatal diagnosis of cord entanglement in monoamniotic multiple pregnancies. (5/638)

OBJECTIVES: Cord entanglement is a severe complication in monoamniotic multiple pregnancies. Three cases were reviewed to determine how early ultrasound diagnosis might improve counselling and management. METHODS: In two monoamniotic twin and one dichorionic diamniotic triplet pregnancies, cord entanglement was detected between 10 and 18 gestational weeks by color Doppler and pulsed Doppler velocimetry. Pregnancies were followed up on a weekly basis with special observation of fetal behavior and use of color Doppler velocimetry. RESULTS: In Case 1, a monoamniotic twin pregnancy with cord entanglement close to the umbilical insertions was diagnosed at 10 weeks. Longitudinal follow-up showed intrauterine death of both twins at 15 weeks. In Case 2, entanglement of the umbilical cords of two monoamniotic triplets within a dichorionic diamniotic triplet pregnancy was diagnosed at 10 weeks. The pregnancy continued uneventfully until 35 weeks when cord entanglement was confirmed at Cesarean section. All triplets have since developed normally. In Case 3, monoamniotic twins were diagnosed at 18 weeks. Color Doppler detected side-by-side insertion of the umbilical cords and Doppler velocimetry suggested an entanglement at the chorionic plate. The pregnancy was complicated by polyhydramnios. Cesarean section at 36 weeks confirmed cord entanglement at the chorionic plate. Postnatal computer angiography and morphological examination of the placenta showed the presence of superficial artery-to-artery and vein-to-vein anastomoses and of deep arteriovenous shunts. The development of the twins was uneventful. CONCLUSIONS: Diagnosis of cord entanglement is feasible early in gestation. Future protocols are proposed to document the gestational age at detection, the location, and the Doppler flow patterns and to facilitate the assessment of short- and long-term development.  (+info)

Multiple dural arteriovenous shunts in a 5-year-old boy. (6/638)

We describe a rare case of multiple dural arteriovenous shunts (DAVSs) in a 5-year-old boy. MR imaging performed at 1 year of age showed only a dilated anterior part of the superior sagittal sinus; however, angiography at 5 years of age revealed an infantile-type DAVS there and two other DAVSs of the adult type. The pathophysiological evolution of DAVSs in children and their treatment strategies are discussed.  (+info)

3D Ultrasound imaging--a useful non-invasive tool to detect AV fistulas in transplanted kidneys. (7/638)

BACKGROUND: A precise, non-invasive, non-toxic, repeatable, convenient and inexpensive follow-up of renal transplants, especially following biopsies, is in the interest of nephrologists. Formerly, the rate of biopsies leading to AV fistulas had been underestimated. Imaging procedures suited to a detailed judgement of these vascular malformations are to be assessed. METHODS: Three-dimensional (3D) reconstruction techniques of ultrasound flow-directed and non-flow-directed energy mode pictures were compared with a standard procedure, gadolinium-enhanced nuclear magnetic resonance imaging angiography (MRA) using the phase contrast technique. RESULTS: Using B-mode and conventional duplex information, AV fistulas were localized in the upper pole of the kidney transplant of the index patient. The 3D reconstruction provided information about the exact localization and orientation of the fistula in relation to other vascular structures, and the flow along the fistula. The MRA provided localization and orientation information, but less functional information. Flow-directed and non-flow-directed energy mode pictures could be reconstructed to provide 3D information about vascular malformations in transplanted kidneys. CONCLUSION: In transplanted kidneys, 3D-ultrasound angiography may be equally as effective as MRA in localizing and identifying AV malformations. Advantages of the ultrasound method are that it is cheaper, non-toxic, non-invasive, more widely availability and that it even provides more functional information. Future prospective studies will be necessary to evaluate the two techniques further.  (+info)

Aortocaval fistula in ruptured aneurysms. (8/638)

OBJECTIVES: to study incidence, clinical presentation and problems in management of aortocaval fistula in our series. DESIGN: retrospective study. MATERIALS: during a seven-year period, 112 patients operated on for abdominal aortic aneurysm, including four patients with aortocaval fistula. METHODS: standard repair of aortocaval fistula from inside the aneurysmal sac was the preferred operative technique. RESULTS: the incidence of aortocaval fistula was 3.6%. Three cases were found incidentally during emergency surgery for ruptured aneurysms; the fourth case was an isolated aortocaval fistula associated with inferior vena cava thrombosis, diagnosed preoperatively by angiography. In this case, inferior vena cava ligation instead of standard aortocaval repair was performed. CONCLUSIONS: Aortocaval fistulas, although rare, should be kept in mind, because clinical diagnosis is often difficult. Furthermore, unsuspected problems during repair may necessitate appropriate change in operative technique.  (+info)

We report a case of 70-year-old woman who had bilateral coronary arteriovenous fistula(CAVF) and treated with percutaneous transcatheter coil embolization. Enlarged LV and reduced global LV systolic function were demonstrated on transthoracic echocardiography. Coronary angiography revealed a large coronary arteriovenous fistula from the right coronary artery to the main pulmonary artery and a small fistula from the left coronary artery to the main pulmonary artery. Percutaneous transcatheter coil embolization for CAVF from the right coronary artery to the main pulmonary artery was successfully performed with symptomatic improvement. ...
Objective To explore the possibility of establishment of experimental femoral pseudoaneurysm (PA) and traumatic arteriovenous fistula (tAVF) models in 40 rabbits and its related study. Methods Experimental PA and tAVF models were established in rabbit with microsurgical anastomosis technique. Models were checked by color Doppler flow imaging (CDFI), examined by computed tomography angiography (CTA), magnetic resonance angiography (MRA) and digital subtraction angiography (DSA). Results Sixteen femoral PA in 20 rabbits (80%) and 26 tAVF in 30 rabbits (87%) were successfully anastomosed and were confirmed by related examination methods. Conclusion It is possible to establish PA and tAVF experimental models in rabbits with microsurgical technique and each one of the above examination methods has its own characteristics. A combination of these examination methods may improve the diagnostic accuracy and treatment ability clinically.
Martinez, M., Pergami, P., Murnick, J., & Pearl, M. (2017). Embolization of a traumatic arteriovenous fistula between the middle meningeal artery and middle meningeal vein in a child with pulsatile tinnitus.. Childs nervous system : ChNS, (). http://dx.doi.org/10.1007/s00381-017-3665-x ...
View details of top pulmonary arteriovenous fistula hospitals in New Delhi. Get guidance from medical experts to select best pulmonary arteriovenous fistula hospital in New Delhi
Pulmonary arteriovenous fistulas.: Previously reported from our institution has been a series of 63 patients with pulmonary arteriovenous fistula who were seen
PAVF have been postulated to represent the persistence of minute arteriovenous communications present in normal fetal and neonatal lung that enlarge to become fistulous and cause precapillary shunting and arterial desaturation.20 Gelatin-calcium carbonate, when injected into the pulmonary arteries of stillborn human fetuses, demonstrates vascular channels that bypass the alveolar capillary bed.21 These channels may play a role in the developing pulmonary circulation before the establishment of an alveolar capillary network.21 Neonatal lungs, therefore, may be more likely to retain these primordial arteriovenous connections and thus increase the susceptibility of younger patients to the development of clinically significant PAVF. We recently described the histopathology of microscopic PAVF in a 7-month-old infant with polysplenia and profound hypoxemia occurring 5 months after a cavopulmonary shunt.11 At autopsy, we found dilated pulmonary veins near the pleural surface and identified abnormal ...
Press Release issued Jan 3, 2018: Arteriovenous Fistula is a disruption of blood flow due to abnormal connection between a vein and artery. In condition of arteriovenous fistula, the blood flows directly from arteries to the vein, bypassing capillaries. Thus, capillary tissues receive less oxygen supply (i.e. blood supply) and increase the risk of blood pressure problem. Arteriovenous fistula can be congenital or acquired. Congenital fistula is formed during fatal development and majorly affects lower extremities of blood vessels.
To compare the hemodynamic effects of a calcium-channel blocker with those of a conventional vasodilator in the awake preinstrumented dog, diltiazem and nitroprusside were administered in equihypotensive infusions before (decrease in mean aortic pressure by 10%; p less than .001, n = 6) and after (decrease in mean aortic pressure by 12%; p less than .001) chronic volume overload (CVO) produced by an infrarenal aortocaval fistula. Diltiazem had no effect on preload either before or after CVO. The maximal rate of change in left ventricular pressure (dP/dtmax) was unaffected by diltiazem before the aortocaval fistula (decrease in dP/dtmax by 6%; p = NS) but was significantly reduced by calcium-channel blockade after CVO (decrease in dP/dtmax by 22%; p less than .001). By contrast, at matched aortic pressures nitroprusside significantly reduced left ventricular end-diastolic dimension (LVEDD) and pressure (LVEDP) in the same animals before (decrease in LVEDD by 10%, p less than .05; decrease in ...
Methods and apparatus are provided for temporarily excluding an aneurysm or an arterio-venous fistula from a flow path by transluminally disposing a hollow balloon catheter structure within the aneurysm so that its proximal and distal ends extend past the aneurysm while maintaining continuity of the flow path, and then injecting a synthetic molding material or a biological hardening agent into the aneurysm cavity to cause solidification of the volume within the cavity. Once the material within the excluded aneurysm has solidified, the balloon catheter structure is deflated and removed, so that the hardened mass forms a new lining for the organ or vessel, and relieves the weakened tissue of the aneurysm or fistula from further flow-induced stress.
A vertebral-epidural spinal arteriovenous fistula (AVF) is an abnormal arteriovenous shunt connecting the vertebral artery to the spinal epidural venous plexus, and may occur spontaneously or secondary to a variety of causes. These unique lesions are uncommon in adults and rarer still in children. Previous reports have grouped together a heterogeneous collection of such arteriovenous lesions, including arterial contributions from the upper and lower vertebral artery, with venous drainage into a variety of spinal and paraspinal collectors. Here, through two cases, we delineate a distinct entity, the lower vertebral-to-epidural AVF. The salient clinical and anatomic features are summarized and contextualized within the broader constellation of vertebrovertebral AVF, the utility of a transarterial intravenous/retrograde intra-arterial endovascular approach is highlighted, and a new use of the Penumbra Occlusion Device (Penumbra Inc) for this purpose is reported.. ...
Definition of Arteriovenous fistula with photos and pictures, translations, sample usage, and additional links for more information.
TY - JOUR. T1 - The murine dialysis fistula model exhibits a senescence phenotype. T2 - pathobiological mechanisms and therapeutic potential. AU - Nath, Karl A. AU - OBrien, Daniel R.. AU - Croatt, Anthony J.. AU - Grande, Joseph Peter. AU - Ackerman, Allan W.. AU - Nath, Meryl C.. AU - Yamada, Satsuki. AU - Terzic, Andre. AU - Tchkonia, Tamara. AU - Kirkland, James L. AU - Katusic, Zvonimir S. PY - 2018/11/1. Y1 - 2018/11/1. N2 - There is no therapy that promotes maturation and functionality of a dialysis arteriovenous fistula (AVF). The search for such therapies largely relies on evaluation of vascular responses and putative therapies in experimental AVFs. We studied an AVF in mice with chronic kidney disease (CKD). We demonstrate numerous stressors in the vein of the AVF-CKD group, including pathological shear, mitogenic, inflammatory, and hypoxia-reoxygenation stress. Because stress promotes premature senescence, we examined whether senescence is induced in the vein of the AVF-CKD model. We ...
Shovlin CL, Jackson JE. Pulmonary vascular abnormalities. In: Broaddus VC, Mason RJ, Ernst JD, et al, eds. Murray and Nadels Textbook of Respiratory Medicine. 6th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 61.. Stowell J, Gilman MD, Walker CM. Congenital thoracic malformations. In: Shepard JO, ed. Thoracic Imaging: The Requisites. 3rd ed. Philadelphia, PA: Elsevier; 2019:chap 8.. Webb GD, Smallhorn JF, Therrien J, Redington AN. Congenital heart disease in the adult and pediatric patient. In: Zipes DP, Libby P, Bonow RO, Mann DL, Tomaselli GF, Braunwald E, eds. Braunwalds Heart Disease: A Textbook of Cardiovascular Medicine. 11th ed. Philadelphia, PA: Elsevier; 2019:chap 75. ...
Arteriovenous (Av) fistula needle is a connection of artery to vein. The arteriovenous fistula needle is recommended as the first choice for hemodialysis. Arteriovenous fistula needles are used in conjunction with a connector of hemodialysis blood tubing set. These needles connect blood lines to the blood vessel through during dialysis procedure via an internal fistula
Normally blood flow begins in the arteries and travels to the veins through the capillaries, whereas AV fistulas bypass the capillaries. This can result in reduced blood supply to the tissues. AV fistula can also be created surgically and used during dialysis for people with kidney failure. Dialysis requires access to the cardiovascular system and over half of the people who need it use AV fistulas, which creates a larger and tougher blood vessel that can tolerate multiple needle punctures needed for dialysis. AV fistula, whether created surgically or caused by disease or trauma, should be monitored carefully since it can lead to severe complications. ...
Patients whose kidneys have failed need to receive dialysis treatment, most commonly with a dialysis machine. In order to be connected to the machine an operation is often performed to join an artery to a vein in the arm. This forms what is known as an arteriovenous fistula. The fistula causes an increase in the flow of blood through the vein and the vein reacts to this by becoming bigger and thicker, making it easier to connect the patient to the machine.. The success rate for the operation is relatively low and only approximately 65 from every 100 operations is still working after a year. It is thought that one factor that may cause problems with the fistula is the ability of the vein to stretch in response to increased blood flow. Previous research has shown that veins in kidney failure patients look different to those of people whose kidneys are working when viewed under a microscope.. The investigators aim to study the structure of the vein that is used in making fistulas with a microscope ...
MUSIC PLAYING] GIUSEPPE LANZINO: Dural fistulas are uncommon lesions, but it is very important for physicians to be aware of these possibilities because, quite often, patients can present with symptoms that might mimic more common conditions and may be misdiagnosed for a long period of time unless the possibility of a dural fistula is entertained early on in the course. A dural AV fistula is an abnormal communication between an artery and a vein, and they can occur both in the brain or in and around the spinal cord. The most common type of fistula is the so-called transverse sigmoid sinus fistula, and these patients often present with a bruit. Typically, if there is a fistula, a bruit can be also heard with a stethoscope, right in the mastoid area. And thats a fairly reliable sign. There are other fistulas located in the region of the cavernous sinus. They can present with ocular symptoms, paralysis of eye movement, decreased vision, redness of the eye and the conjunctiva. Its very common for ...
My 7 month old son has recently been diagnosed with a Arteriovenous fistula on his spine behind his chest. His legs do not work properly and his feet are pointed he also has low muscle tone. I no this is very rare and even more unusual in someone so young has any one else had an experience of this? What Treatmeant was given ect. Im feeling very alone and desperate for answers. Im waiting to hear from great ormand street hospital to see it theres anything they can do. I would really
IntroductionA central stent derived arterio-venous iliac fistula using the ROX Coupler reduces blood pressure (BP) in patients (pts) with resistant and/or uncontrolled hypertension (HTN). We performed detailed stress echocardiograms (echos) during concurrent cardiopulmonary exercise testing (CPET) p
An arteriovenous fistula is an abnormal connection between the arterial and venous systems. In the literature, there are well-described ultrasound findings of iatrogenic arteriovenous fistula as a potential complication from percutaneous transarterial or transvenous procedures. The most important sign is direct visualization of the fistula in the place of the access site. It is necessary to look for secondary signs of arterialization of the veins, which can suggest a diagnosis of an arteriovenous fistula. However, the accuracy and diagnostic quality of duplex scanning in the diagnostics of a congenital or spontaneous arteriovenous fistula of the head and neck area in adults have been poorly described in the literature ...
A 58-year-old healthy man initially presented to the emergency room with gunshot wound (GSW) birdshot injuries to the back of his left leg that occurred on a hunting trip. His initial examination showed normal pulses without any localized neurologic deficits. He was reevaluated in the clinic 1 month later with a thrill in the popliteal fossa and diminished pedal pulses. A duplex ultrasound study confirmed an arteriovenous fistula (AVF) at the level of the proximal posterior tibial artery (PTA) or distal popliteal artery. An endovascular intervention resulted in successful coverage of the AVF and improvement of distal limb perfusion (Figure 1). ...
Hemodialysis and peritoneal dialysis are the two possible choices in chronic renal disease in the uremic stage. Native arteriovenous fistula is susceptible to complications, some posing vital risk and requiring prompt treatment. We present the case of a patient undergoing hemodialysis on native AVF. An aneurism developed progressively on the arterialized cephalic vein. The AVF was abolished by closing the arteriotomy with a venous patch and excising the aneurismal venous segment. The pathology exam of the surgical specimen showed unequal vessel wall thickness due to hyperplasia of the media and subintimal space, with calcifications within the hyperplastic media.
These fistulae occur as a result of previous transverse sinus thrombosis with dural arterioles entering the sinus lumen to recanalize, creating multiple tiny fistulae, i.e. external carotid branches (supplying the dura) to transverse venous sinus.
BACKGROUND: Access-related problems are one of the major causes of morbidity in elderly patients with chronic kidney disease. The aim of this study was to assess potential risks and benefits in elderly patients comparing forearm arteriovenous fistula
Making an AV fistula is like connecting a new resistance in parallel to the arterial circuit. A parallel arrangement of vessels greatly reduces resistance to blood flow. ...
congenital fistulae are often difficult to treat because of multiple fistulae and the tendency for more fistulae to open up following ligation of the more obvious ones. Conservative treatment with compression stockings may be the best ...
February 7, 2018-TVA Medical, Inc. announced the presentation of an international meta-analysis of clinical experience in patients who received the companys everlinQ endovascular arteriovenous fistula (endoAVF) for hemodialysis access. The study analyzed data from 236 patients with end-stage renal disease (ESRD) at 28 centers in seven countries. The findings were presented by Tobias Steinke, MD, at LINC 2018, the Leipzig Interventional Course held January 30 to February 2 in Leipzig, Germany.. The company stated that the everlinQ endoAVF system is designed to create an arteriovenous fistula for hemodialysis access using an endovascular approach. In the procedure, two thin, flexible magnetic catheters are inserted into an artery and vein in the arm. A small amount of radiofrequency energy is used to connect the artery and vein to create the fistula. The catheters are then removed and a brachial vein is coil embolized, enabling future dialysis.. Dr. Steinke commented in the companys ...
Case Reports in Transplantation is a peer-reviewed, Open Access journal that publishes case reports in all areas of transplantation.
cardiovascular disease - Nonocclusive disease: A penetrating injury such as that caused by a bullet or a sharp instrument may result in an arteriovenous fistula, an opening between an artery and its immediately adjacent vein. Large amounts of blood may be shunted from the artery to the vein. Arteriovenous fistulas are particularly common in...
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies. ...
Multiple T2 bright white matter lesions are predominantly periventricular, aligned along along perimedullary veins . On sagittal imaging the so called Dawsons fingers are evident. A lesion in the right frontal lobe, demonstrates restricted diffusion and enhancement representing current activity. ...
The textbooks always seem to show this being done with two delicate fingers, which is silly; more fingers means more coverage, so I always use at least three. (Your little finger is kinda short, otherwise itd be four.) Use a moderate pressure, but if youre having trouble, try pressing both lighter and firmer, as well as moving to different spots. (While I usually wear my watch in the normal position, youll notice here that when taking a pulse this way, I flip it around my wrist so I can see the face.). The main way to ensure youre never baffled by the pulse, however, is by always being willing to look elsewhere. Some people simply wont have a radial, and this fact may or may not have significance - it may mean theyre hypotensive, or that their arm is locally hypoperfused, but it also may be a chronic condition. Hemodialysis patients with arterio-venous fistulas in their arm are especially notorious for having peculiar or absent radial pulses, as the arteries near the fistula have been ...
A fistula for dialysis is referred to as an arteriovenous fistula, which is the connection of an artery to a vein in order to make the vein strong for hemodialysis, according to National Kidney and...
The bile duct is like that, too, if a little less certainly. When theres obstruction with infection, it can get red and thick, the inner surface knobbly and cobbled. Mostly, though, its a similar wonder: clean and crisp and sparkling on the inside. Theres something about these vessels and ducts that foster their own brand of amazement. Springy and soft, yet turgid and tough. Sewing a vein, unlike anything else, (as long as its not during a mad rescue attempt) is almost meditative. Its quiet; maybe because the suture is finer, the instruments more delicate than with other kinds. And because it demands the perfection of needlepoint: even bites, close, careful and exact. Theres rubbery resistance to the needle which gives way with a little recoil. Theres no tissue quite like it. If creating, say, an arteriovenous fistula for dialysis, or if sewing a vein-patch onto an artery, you go through the vein first with the needle, and the textural difference is clear. Sometimes, you hold the slender ...
The bile duct is like that, too, if a little less certainly. When theres obstruction with infection, it can get red and thick, the inner surface knobbly and cobbled. Mostly, though, its a similar wonder: clean and crisp and sparkling on the inside. Theres something about these vessels and ducts that foster their own brand of amazement. Springy and soft, yet turgid and tough. Sewing a vein, unlike anything else, (as long as its not during a mad rescue attempt) is almost meditative. Its quiet; maybe because the suture is finer, the instruments more delicate than with other kinds. And because it demands the perfection of needlepoint: even bites, close, careful and exact. Theres rubbery resistance to the needle which gives way with a little recoil. Theres no tissue quite like it. If creating, say, an arteriovenous fistula for dialysis, or if sewing a vein-patch onto an artery, you go through the vein first with the needle, and the textural difference is clear. Sometimes, you hold the slender ...
A vessel that directly interconnects an artery and a vein, and that acts as a shunt to bypass the capillary bed. Not to be confused with surgical anastomosis, nor with arteriovenous fistula.. ...
A five-year-old girl patient was admitted with cyanosis and dyspnea, which started from birth. She had small telangiectatic lesions on her face and cerebral arteriovenous malformation, but no family history of hereditary hemorrhagic telangiectasia. Contrast echocardiography and pulmonary angiography demonstrated diffuse pulmonary arteriovenous fistulas. The patient was diagnosed as polysplenia syndrome characterized with left atrial isomerism, interrupted inferior vena cava, azygous continuation to the superior vena cava, and hepatic veins draining to the right atrium. In contrast to the other polysplenia syndrome cases, in this patient, pulmonary arteriovenous fistulas were not associated with cavopulmonary anastomoses or liver disease.
Looking for online definition of arteriovenous fistula in the Medical Dictionary? arteriovenous fistula explanation free. What is arteriovenous fistula? Meaning of arteriovenous fistula medical term. What does arteriovenous fistula mean?
Background and aim 9 patients with 10 arteriovenous fistulas were treated with Onyx at our institution over a period of 19 months 4 direct and indirect carotid-cavernous fistulas (CCFs) and 6 dural arteriovenous fistula (DAVFs). Complete occlusion was achieved with no recurrences or permanent complications in our small series. We report hemodynamic instability, including severe bradycardia and asystole, during embolization of DAVF and CCF with Onyx in several patients. These changes were reversible with interruption of Onyx injection and administration of atropine. No recurrence of symptoms after atropine administration was noted as Onyx embolization continued during the same session or during postprocedural 24 h monitoring. No adverse clinical consequences were noted.. Results Bradycardia was observed in four cases, with a brief asystole in two of these patients during transarterial and transvenous Onyx delivery at cavernous sinus and orbital levels. Based on our observation, hemodynamic ...
Evolution after treatment. The clinical response was favorable, with gradual improvement of motor deficit, regaining the ability to walk soon after hospital discharge. Two months later, the patient got significant improvement. The patient continued with rehabilitation and he had an almost complete recovery. One year after treatment, control arteriography was performed showing persistent occlusion of the DAVF.. Discussion. It is believed that spinal DAVFs (SDAVFs) are an acquired pathology, although its exact etiology is unknown. Arteriovenous communication occurs between a dural branch of the radicular artery, with the nest of vessels located in the dura near the radicular exit, and a vein, which drains intradurally into the venous perimedullary plexus.2,3 Dural arteriovenous fistulas (DAVFs) at the craniocervical junction are uncommon but they produce clinical important abnormalities. These lesions have two main forms of clinical presentation; acute subarachnoid hemorrhage (SAH) and ...
PICTURES IN DIGESTIVE PATHOLOGY. Colour-Doppler features of hepatic involvement in Rendu-Osler-Weber disease. Papel de la ecografia Doppler-color en la enfermedad de Rendu-Osler-Weber con afectación hepática. M. Carmen Garre-Sánchez, Francisco Javier Álvarez-Higueras, María Muñoz-Tornero, Akiko Ono-Ono, Manuel Miras-López, José Antonio Pons-Miñano and Luis Fernando Carballo-Álvarez. Department of Digestive Diseases. Hospital Universitario Virgen de la Arrixaca. Murcia, Spain. Case report. A 39-year-old woman with a past history of Rendu-Osler-Weber disease of 16 years was referred to our unit to evaluate hepatic involvement. Previous pulmonary arteriovenous malformations were treated with embolization. It is known that recurrence of pulmonary arteriovenous malformations (VMs) requires a new treatment modality. On physical examination no skin lesions were found. Laboratory parameters were normal. Ultrasound imaging findings were: Dilation of he patic artery (diameter 12 mm), tortuous ...
Guest Editors Rafael J. Tamargo and Judy Huang have focused on "e;Cranial Arteriovenous Malformations (AVMs) and Dural Arteriovenous Fistulas (DAVFs) in
Arteriovenous fistulas are another medical hardship of the middle meningeal artery. Physically, the middle meningeal artery runs along the side of the paired veins, and a stressful tear in the cranium wall may additionally result in a stressful this. The incidence of annoying center meningeal arteriovenous Fistula is extremely high, however, clinical headaches do often seen.. For this purpose, it is believed that many disturbing AFVs resolves spontaneously. Cases of longstanding its, however, have predisposed sufferers to headaches starting from venous congestion to intracranial hemorrhage ...
Looking for online definition of Arteriovenous fistulae in the Medical Dictionary? Arteriovenous fistulae explanation free. What is Arteriovenous fistulae? Meaning of Arteriovenous fistulae medical term. What does Arteriovenous fistulae mean?
Telangiectasia hemorrágica hereditária - Wikipédia, a ....A telangiectasia hemorrágica hereditária (ou Síndrome de Rendu-Osler-Weber) é uma doença autossómica dominante. [1] Pensa-se serem dois os genes envolvidos: ENG ...--Síndrome de Osler-Weber-Rendu - pt.healthline.com.Osler-Weber-Rendu syndrome (OWR) is also known as hereditary hemorrhagic telangiectasia (HHT). It is a genetic blood vessel disorder that often leads to excessive ...--Rendu-Osler-Weber Disease: clinical and surgical treatment.SUMMARY. Hereditary Haemorrhagic Telangiectasia (Rendu-Osler-Weber disease) is a rare disease with and incidence of 1-2/100000, affecting blood vessels of the skin ...--Rendu-Osler-Weber Syndrome: case report and literature review.RESUMO. A telangiectasia Hemorrágica Hereditária ou Síndrome de Rendu-Osler-Weber é uma rara displasia fibrovascular que torna a parede vascular vulnerável a ...--Radiologia Brasileira - Síndrome de Rendu-Osler-Weber: o ....INTRODUÇÃO A síndrome de ...
A case of acquired arteriovenous fistula with multiple aneurysmal sacs of the left fifth finger has been presented in an adult, resulting from a human bite in childhood. The digit, previously normal, showed characteristic physical chances of A-V fistula following the trauma, including increased growth, venous distension, increased local temperature and more rapid growth of the nail. In addition, there were occasional episodes of transient subungual spurting of arterialized blood over a 15-year period. Surgical excision of aneurysmal sacs and ligation of visible communications on two separate occasions resulted in the disappearance of symptoms, enabling the patient to resume her vocation as a typist ...
The authors reported an extremely rare case of bilateral spontaneous vertebro-vertebral arteriovenous fistulas (VVAVFs) associated with fibromuscular dysplasia (FMD). A 53-year-old hypertensive woman has been placed on antiplatelet drug following diagnosis of supratentorial ischemic stroke for 2 years. Few months before hospitalization, she developed bilateral audible bruits and progressive spastic quadriparesis.
Objective: To investigate the reason of autogenous arteriovenous fistula failure by analyzing the clinical data of 32 hemodialysis patients in the Dep..
Since hemodynamic factors have been implicated in the localization and pathogenesis of atherosclerosis, the effect of hemodynamic stress on endothelium was investigated. The endothelium of the inferior vena cava of 24 rabbits with aortocaval fistulas was stained in situ and examined by the Hautchen technique at postoperative intervals ranging from 1 to 50 weeks. Cell counts revealed that, in the anastomosed vein of the fistula, an initially high frequency of abnormal cells decreased 3-12 weeks postoperatively but rose again within 20-50 weeks to levels significantly higher than those in either normal venous endothelium or sham-operated veins. An originally high mitotic index at 1-2 weeks decreased with time but still remained significantly larger than that observed in sham-operated rabbits. In most rabbits with arteriovenous shunts, a small area of the inferior vena cava near the fistula was devoid of endothelium, covered with a thin deposit of mural thrombi, and considered to be a jet lesion. ...
Can a pulmonary AV fistula be visualized on a coronary CTA angiography study? My cardiologist stated that a loud murmur was likely a pulmonary AV fistula. I had a coronary CTA angiography, which reve...
HealthTap: Doctor answers on Symptoms, Diagnosis, Treatment, and More: Dr. Pak on ligation av fistula: Countless studies and decades of research have shown a clear advantage for patients who undergo hemodialysis through an av fistula. The second best is an av graft and all catheter-based modalities for hemodialysis are a distant third.
CT Abdomen with contrast. A: Computed tomography (CT) during hepatic artery phase reveals contrast in aorta and right anterior portal vein (arrow). B: Maximum intensity projection also during hepatic artery phase shows hepatic artery (arrowhead) and right portal vein branches (arrow). (Source: Gallego C, Velasco M, Marcuello P, Tejedor D, De Campo L, Friera A. Congenital and acquired anomalies of the portal venous system. RadioGraphics 2002;22:141-159, with permission from the Radiological Society ...
Diagnostic procedure of choice: Angiography is the most important DAVF diagnosis tool. This study shows the connection, generally from the extracranial circulation, with venous sinuses and/or subarachnoid veins. Intracranial branches might also be involved, although less frequently. It is essential to rule out the presence of cortical venous reflux and intracranial varices, which correlate with the risk of clinical manifestation. ...
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BACKGROUND: Chronic pain due to spinal dural arteriovenous fistulae (SDAVF) during follow-up is a serious issue because it can affect patients quality of life. The severity of posttreatment chronic leg pain in patients with SDAVF is unclear. OBJECTIVE: To investigate the prevalence, severity, and characteristics of chronic leg pain in patients with SDAVF and to…
HealthTap: Doctor answers on Symptoms, Diagnosis, Treatment, and More: Dr. Korona on how long do you need to wait before you work out after av fistula placement: Absolutely up to the surgeon who placed the fistula.
My sisters kidneys shut down from strong meds used for a 3rd degree burn on her leg about 3+ weeks ago. She has a thing below her collar bone for dialysis for now, but the doctor thinks the kidneys will reverse. The question is, he wants her to come in, in 2 weeks to set up an appt for an AV Fistula in her arm ...
May 30, 2018-TVA Medical, Inc. announced that findings from a health care analysis show that the companys catheter-based endovascular system for creating hemodialysis access offers quality-of-life benefits and cost savings compared with the traditional surgical approach in patients with end-stage renal disease (ESRD). The study comparing TVA Medicals everlinQ endovascular arteriovenous fistula (endoAVF) system with surgical arteriovenous fistula (AVF) creation was presented at ISPOR 2018, the International Society for Pharmacoeconomics and Outcomes Research global conference held May 19-23 in Baltimore, Maryland.. The retrospective analysis compared endoAVF patients from NEAT, the Novel Endovascular Access Trial, with propensity score-matched surgical AVF patients from the United State Renal Data System for 1 year after AVF creation.. According to the company, endoAVF patients compared with surgical AVF patients had approximately double the number of days with a functioning AVF for dialysis. ...
MATERIALS AND METHODS: The records of 15 consecutive subjects (mean age, 65 years; 2 women) who had undergone CTA and digital subtraction angiography for clinically suspected spinal arteriovenous fistula were reviewed. From CTA images obtained at the arterial and late arterial phases, warped images of the late arterial phase were obtained by using nonrigid registration that was adjusted to the arterial phase images. R-CTA images were then obtained by subtracting the warped images from the arterial phase images. The accuracies of using nonrigid registration and conventional spinal CTA and the time required for detecting arterial feeders in spinal arteriovenous fistulas were analyzed for each patient with DSA results as a standard reference. The difference between R-CTA and conventional spinal CTA was assessed by the Welch test and the McNemar χ2 test. ...
This volume reviews standard treatments for spinal dural arteriovenous fistulas, examining the anatomy of arteries and veins of the sylvian fissure, as well as microsurgical advances and the developme
Flow Forward is developing a novel approach to rapidly establish high-quality vascular access sites for hemodialysis. The Arteriovenous Fistula Eligibility (AFE) System™ is a small, temporary, external blood pump designed to stimulate flow-mediated dilation to make more patients eligible for an arteriovenous fistula (AVF), and increase success rates after surgery. Establishment of a reliable AVF reduces morbidity and mortality in hemodialysis patients, as well as the overall cost of care.. Nonclinical data shows the AFE System can dilate veins 20 times faster than with a traditional AVF, with a dramatic reduction in the formation of internal hyperplasia (vascular scarring). Flow Forward expects that widespread use of the AFE System would allow the rapid establishment of high-quality AVFs in nearly all hemodialysis patients.. ...
Free, official coding info for 2018 ICD-10-CM I77.0 - includes detailed rules, notes, synonyms, ICD-9-CM conversion, index and annotation crosswalks, DRG grouping and more.
As I mentioned a month ago I was a guinea pig on the renal ultrasound course today and had my fistula scanned by 14 post-grad doctors planning to specialize in renal medicine. The scanning itself was fascinating, seeing the veins and arteries in my arm, watching the blood flow etc, though I was a little unnerved when the tutor mentioned that there is an area of thickening or possible thrombosis in the artery again (I had to have fistula angioplasty earlier this year when the fistula stopped working due to thrombosis) - however he did say that the fistula is still patent and the blood flow sufficient at the moment. Ill need to be vigilant with checking the bruit ...
Theres good news and theres bad news I would say. Bad news - My kidneys are failing Most people would be shocked an a little anxious for me. They would ask me questions on the different things in my blood like creatinine, urea and eGFR and things like that. But they would soon recover, and…
PURDY, M. R.; LUTRIN, D. L. and VELLER, M. G.. Aortocaval fistula - rare complication of ruptured abdominal aortic aneurysms. S. Afr. j. surg. [online]. 2009, vol.47, n.3, pp.86-88. ISSN 2078-5151.. ...
A fistula is an abnormal communication between two internal organs, or from an organ to the outside of the body. Infection, inflammatory disease (e.g., Crohns disease), tumors, trauma, and surgery may lead to a fistula. The gastrointestinal tract (particularly the duodenum), pancreas, bladder, and female genital tract are particularly susceptible. Among the many places in the body where fistulas can occur are: ...
(1987) Zarins et al. Journal of Vascular Surgery. We studied the adaptive response of the arterial wall and intimal thickening under conditions of increased flow in an atherogenic model. Blood flow was increased by construction of an arteriovenous fistula between the right iliac artery and vein i...
A new first-in-class agent shows promise for improving outcomes in CKD patients undergoing surgical placement of an arteriovenous fistula.
My mother has been diagnosed with kidney failure three weeks back. At that time her platelet count was normal 1.44 lakh/cmm. She has a AV fistula operation done, which was repeated since the first fistula did not function and later acquired infection. She was given claribid for the infection. The swelling and pain has reduced to a great extent. However, now her platelet count has reduced to 0.85 lakh/cmm and ESR 1st hour has been raised to 59 mm. We had not tested for her ESR earlier. Can we suspect autoimmune disorder (lupus)? Can the high ESR count be because of the infection of the non-functional fistula?
A patient suffering from an AV fistula fed by the external carotid artery, who has failed occlusion via embolization, is being operated on by Dr. Czabanka to definitively treat the fistula. With the help of CT navigation and ICG angiography, Dr. Czabanka is able to microscopically devascularize the problematic malformation ...
Fistula Foundation has just passed a major milestone: since adopting a global mission in 2009, support from generous donors like you has enabled the delivery of life-changing fistula surgery to 20,000 women!. In this short video, youll see some of the faces of women that you and our partners have helped to treat. Read more about how we reached this goal, and why this number is significant. ...
it seems you have perianal crohns. You should try to get this cleared up because it can get worse. That means doing all mentioned such as getting the remicade as soon as possible. If its infected you might also need a antibiotic. Take sitz bath every few hours. The small intestine issue could be contributing manifesting itself downward to the rectum, or it could be a bacteria clogging things there. You should get a surgeon to look at the fistula, asap and find out whatever they want to do to heal it. Another post had something about using a foam product. Try everything... even if you need to ask it to be stitched. Many times its been said not to mess with it surgically so you definetl need advice from someone who actually closed there fistula without further problems and the only drug I know of is remicade which might give you a chance to save the rectum area. Strongly suggest start remicade now infection or not, as well as all the above continuously ...
Unable to work, socialize or bear children, more than two million women in Sub-Saharan Africa and Asia suffer severe disabilities from childbirth-caused fistula - an entirely preventable injury. Ho...
Selamat siang Dokt, Sy mau tanya, kurang lebih 2 tahun yg lalu sy operasi Fistula Ani, alhamdulillah semua berjalan lancar, tetapi akhir2 ini sekitar bekas operasi
Important note. Whilst the first film in this series is openly available because it only demonstrates basic principles, the subsequent films give specific and detailed surgical guidance. They are not intended, therefore, for general viewing but are being made freely available only to those medical professionals who already have specific experience of the surgery involved and who can thus benefit from the specialist techniques that these films demonstrate.. To view these films please register your name and professional status (you only need to register once and will then have repeated access). * required. ...
Abnormal communication most commonly seen between two internal organs, or between an internal organ and the surface of the body ...
ylbadroffa secivres tneitaptuo dna tneitapni etavirp sreffo osla tI .alutsif fo epyt yna morf gnireffus eb ot demrifnoc neeb evah ohw stneitap ot seiregrus alutsif eerf reffo ot dehsilbatse saw latipsoH ehTThe Hospital was established to offer free fistula surgeries to patients who have been confirmed to be suffering from any type of fistula. It also offers private inpatient and outpatient services affordably
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... On-line free medical diagnosis assistant. Ranked list of possible diseases from either several symptoms or a full patient history. A similarity measure between symptoms and diseases is provided.
TY - JOUR. T1 - Dural arteriovenous fistula presenting with exophthalmos and seizures. AU - Feyissa, Anteneh. AU - Ponce, Lucido L.. AU - Patterson, Joel T.. AU - Von Ritschl, Rudiger H.. AU - Smith, Robert G.. PY - 2014/3/15. Y1 - 2014/3/15. N2 - Concomitant seizures and exophthalmos in the context of a temporal dural arteriovenous fistula (dAVF) has not been described before. Here, we report a 55-year-old-male who presented with an 8-month history of progressive painless exophthalmos of his left eye, conjunctival chemosis, reduced vision and new onset complex partial seizures. Cerebral angiography demonstrated Cognard Type IIa left cerebral dAVF fed by branches from the left occipital artery and an accessory meningeal artery, with drainage to the superior ophthalmic vein. Following surgical obliteration of dAVF feeding vessels, our patient had dramatic improvement in visual acuity, proptosis and chemosis along with cessation of clinical seizures.. AB - Concomitant seizures and exophthalmos in ...
OBJECT The authors report their preliminary experience using a balloon-assisted technique (BAT) in the transarterial embolization of intracranial dural arteriovenous fistulas (DAVFs). METHODS The authors reviewed the prospectively collected data obtained in 7 consecutive patients with DAVFs in whom embolization was achieved using transarterially injected Onyx with either the venous or arterial BAT. Procedures were performed at the Division of Interventional Neuroradiology at the University of California at Los Angeles Medical Center between September 2005 and January 2008. RESULTS Three patients presented with cortical venous reflux and 4 did not. Three patients underwent transarterial Onyx-based embolization combined with transvenous balloon protection; the balloon was inflated in the transverse sinus in 2 of these patients and in the superior sagittal sinus in the third. One of them underwent an additional transarterial Onyx embolization with arterial BAT, whereas 4 other patients were treated
A 72-year-old man suffering from congestive heart failure, swelling of the lower limbs and hematuria was transferred from another hospital with a diagnosis of large aneurysms of the abdominal aorta and the left common iliac artery. Iliac arteriovenous fistula (AVF) was definitively diagnosed preoperatively by contrast-enhanced CT and angiogaphy. At operation, an infrarenal abdominal aortic aneurysm of 8cm and left iliac arterial aneurysm of 12cm were identified. After proximal and distal aortic clamping, the aneurysm was entered and an AVF orifice of 1cm communicating with the left common iliac vein was disclosed at the right posterior wall of the left common iliac artery. Venous blood reflux was controlled by inserting an occlusive balloon catheter to the fistula and intraoperative shed blood was aspirated and returned by an autotransfusion system. The AVF was closed from inside the iliac aneurysm by three interrupted 3-0 monofilament mattress sutures with pledgets. The aneurysms were resected ...
Background: Although almost all dural arteriovenous fistulas (DAVFs) can be highly curable using endovascular treatment, some of them are reflactory. We evaluated the efficacy of stereotactic radiosurgery for DAVFs reflactory to endovascular treatment.. Methods: In 178 patients with DAVFs treated by endovascular embolization in our institution, 12 patients were reflactory and treated by CyberKnife (CK) radiosurgery. Patients background, efficacy of CyberKnife radiosurgery and complication were analyzed.. Results: 5 men and 7 women underwent CyberKnife radiosurgery. Ages ranged from 21 to 74 years (mean, 57.5 years). The locations of the fistulas were 10 transverse/sigmoid sinus and 2 cavernous sinus. The Borden classification was I in 3, II in 6, and III in 3 patients. Transarterial embolization (TAE) was performed in 10 patients, TAE and transvenous embolization (TVE) in 2. In all cases, shunt flow could be reduced, but small flow was residual. After embolization, residual fistula was treated ...
A dural arteriovenous fistula (DAVF), is an abnormal direct connection (fistula) between a meningeal artery and a meningeal vein or dural venous sinus. In cases where there are multiple fistulas, the related term dural arteriovenous malformation (DAVF) is used. The most common signs/symptoms of DAVFs are: Pulsatile tinnitus Occipital bruit Headache Visual impairment Papilledema Pulsatile tinnitus is the most common symptom in patients, and it is associated with transverse-sigmoid sinus DAVFs. Carotid-cavernous DAVFs, on the other hand, are more closely associated with pulsatile exophthalmos. DAVFs may also be asymptomatic (e.g. cavernous sinus DAVFs). Most commonly found adjacent to dural sinuses in the following locations: Transverse (lateral) sinus, left-sided slightly more common than right Intratentorial From the posterior cavernous sinus, usually draining to the transverse or sigmoid sinuses Vertebral artery (posterior meningeal branch) It is still unclear whether DAVFs are congenital or ...
Intracranial multiple dural arteriovenous fistulas (MDAVFs) are rare lesions that are difficult to treat. The key factors involved in the development of MDAVFs remain unknown. At present, the majority of reports on intracranial MDAVFs are confined to case reports and small case series, and thus understanding of MDAVFs is limited. The current review assesses the available literature to date with the aim of reviewing the progress in research on intracranial MDAVFs. Intracranial MDAVFs may be divided into two types: Synchronous and metachronous. While the exact pathogenesis of MDAVFs is unknown, a number of possible mechanisms are considered relevant. The first is that MDAVFs develop following recanalization of a large sinus thrombosis that involves several sinuses. The second possibility is that a pre-existing DAVF may induce sinus thrombosis or venous hypertension, resulting in a new MDAVF. The third is that MDAVFs are caused by increased angiogenic activity, which may induce the development of ...
A 28-year-old woman had a normal delivery (primipara) on January 15, 2009. On March 20, 2009, she suffered sudden onset of severe headache. Protein-S and protein-C levels were within the normal ranges. Computed tomography on admission showed no subarachnoid hemorrhage, and the patient was discharge with analgesic treatment. Four days later the patient presented again to our emergency department with increased headache, nauseas, vomiting and bruit of the head. In view of the history and clinical evolution, an urgent computerized tomography (CT) brain scan with intravenous contrast was done showing the empty delta sign; as magnetic resonance imaging (MRI) scan was not available at that time, computed tomography in venograms (Fig. 1a,b) was performed revealing occlusion of the superior sagittal sinus and the bilateral transverse sinus. The patient was referred to the Department of Neurosurgery where a cerebral angiography confirmed sinus thrombosis (ST) and revealed a dural arteriovenous fistula ...
We report the angiographic findings from six patients with intracranial dural arteriovenous fistulas of the inferior petrosal sinus and describe the clinical presentation, vascular anatomy, and embolization techniques used in the treatment of this disorder. Dural arteriovenous fistulas at this site are rare; of 105 patients diagnosed with this abnormality, only six had lesions involving the inferior petrosal sinus. The patients included three men and three women, ranging in age from 41 to 75 years. Patients presented with bruit, proptosis, abducens palsy, or loss of vision, and symptoms were present for up to 1 year prior to diagnosis. These presentations were similar to cavernous sinus arteriovenous fistulas. The arterial supply in all cases was from branches of the external carotid artery and in three cases from the meningohypophyseal trunk of the internal carotid artery. Venous drainage in four patients was via the cavernous sinus to the superior ophthalmic vein. The remaining two patients ...
書名:Brain Arteriovenous Malformations and Arteriovenous Fistulas,語言:英文,ISBN:9781626233225,頁數:296,作者:Dumont, Aaron S., M.D. (EDT)/ Lanzino, Giuseppe, M.D. (EDT)/ Sheehan, Jason P., M.D., Ph.D. (EDT),出版日期:2017/10/01,類別:自然科普
Vascular complications during posterior lumbar disc surgery are rare and its presentation with varicose veins is even rarer. A 23 year-old male patient presented with large varicose veins in right lower limb. He underwent a posterior lumbar spine discectomy surgery. He noticed mild swelling of the distal third right lower limb 3 months after index surgery and reported 6 months later when he developed varicose veins. Duplex Doppler confirmed varicose veins of the long saphenous vein and its tributaries with a patent deep venous system. A digital subtraction angiogram demonstrated a large right common iliac artery (CIA) false aneurysm with an arteriovenous fistula between right common iliac vessels. He had a right CIA covered stent insertion with good results. Varicose veins were later managed with sapheno-femoral junction ligation and a below knee long saphenous vein stripping. At six month follow-up the lower limb swelling had completely recovered and duplex ultrasound did not show any ...
The treatment of type II fistulas has previously been discussed.4 As it seems that retrograde drainage produces intracranial hypertension in 20% of the patients, type II fistulas consequently must be considered as potentially dangerous. Asymptomatic patients have to be examined repeatedly (once a year) with neurological examination including ophthalmoscopy, and Doppler studies. We think that MRI could play a part as a method of screening patients with benign intracranial hypertension. However, our own experience in this field is too limited to draw any firm conclusions. MR angiography will probably be a reliable examination in the future. Nevertheless, its capacity to precisely analyse the fistula venous drainage and the cerebral venous drainage will remain certainly less accurate than selective or hyperselective angiography. Whatever the method, the competition of the venous drainage of the fistula and of the brain needs to be clearly analysed to indicate the therapeutic decisions.. Due to the ...
This study was performed to investigate the impact of intima-media thickness (IMT) of radial artery on early failure of radiocephalic arteriovenous fistula (AVF) in hemodialysis (HD) patients. Ninety uremic patients undergoing radiocephalic AVF operation were included in this study. During the opera …
Attia, A. A. E. M., and A. M. Hassan, Effect of cryotherapy on pain management at the puncture site of arteriovenous fistula among children undergoing hemodialysis, International Journal of Nursing Sciences, vol. 4, issue 2017, pp. 46-51, 2017 ...
Arteriovenous (AV) fistula is a vascular access used to access the blood for hemodialysis treatment and can last for many years so those with chronic kidney disease who have advanced to end stage renal disease are able to receive dialysis.
Over the past decade substantial advances in diagnostic imaging, classification, and understanding the natural history of intracranial dural arteriovenous fistula (dAVF) have been made. Paralleling these improvements in patient evaluation and risk assessment have been considerable innovations and refinements in the microsurgical and endovascular techniques by which appropriately selected patients with dAVF are treated. On the microsurgical front, minimally invasive surgical approaches with less soft tissue and bony disruption, along with enhanced tools for the intraoperative assessment of vascular anatomy and completeness of dAVF obliteration, are now commonly utilized. On the endovascular front, liquid embolic agents, balloons, and flow-directed catheters have transformed our capacity to safely and effectively treat dAVFs with a variety of anatomic configurations and locations. Innovative combinations of microsurgical and endovascular approaches are even being applied to select cases. In this ...
is committed to improving the health of patients with kidney and vascular diseases through the development of novel, first-in-class therapeutics. Proteons lead product candidate, vonapanitase, is an investigational drug intended to improve arteriovenous fistula patency, the period of time during which a fistula remains open with adequate blood flow to enable hemodialysis. Proteon is currently evaluating vonapanitase in patients with chronic kidney disease (CKD) undergoing surgical creation of a radiocephalic arteriovenous fistula. Proteon today released results from its first Phase 3 trial, PATENCY-1, and is currently enrolling patients in an additional Phase 3 clinical trial, PATENCY-2. Proteon is also evaluating vonapanitase in two Phase 1 clinical trials in patients with peripheral artery disease (PAD). For more information, please visit www.proteontx.com.. Cautionary Note Regarding Forward-Looking Statements. This press release contains statements that are, or may be deemed to be, ...
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The location of dental fistulas makes them relevant to several medical specialties, but it is the dental surgeon who is best placed to appreciate their nature. Long asymptomatic and often hidden in mucosal folds, dental fistulas are still quite common: errors in diagnosis and treatment are generally good. Definition of Dental fistula From the Latin fistula, which […]. ...
TY - JOUR. T1 - Giant arachnoid granulation with a thrombosed dural arteriovenous fistula. AU - Karegowda, Lakshmikanth Halegubbi. AU - Rajagopal, Kadavigere. AU - Krishnamurthy, Suresh Kanase. AU - Lakshmana, Shivarajkumar. PY - 2018/1/1. Y1 - 2018/1/1. N2 - Arachnoid granulations are common incidentally detected small dural lesions which are usually asymptomatic and follow cerebrospinal fluid density/signal intensity on CT/MRI. Such lesions reaching a size of more than 1 cm are termed as giant arachnoid granulations (GAGs) which have been previously reported to cause venous hypertension and headaches. We report a case of GAG involving the proximal half of the superior sagittal sinus in a 45-year-old male patient which was associated with left temporal thrombosed dural arteriovenous fistula (AVF) whose thrombosed draining veins were seen converging towards the site of GAG. The patient presented with three episodes of generalised tonic-clonic seizures and improved with conservative treatment. No ...
A 52-year-old man with a history of factor V Leiden thrombophilia, persistent headaches and papilloedema presented with worsening vision and confusion. MRI and MR angiography of the brain at the time of this presentation showed findings concerning for transverse sinus thrombosis and an associated dural arteriovenous fistula. Dural venous sinus thrombosis can lead to the formation of a dural arteriovenous fistula, which must be considered in the differential diagnosis for intracranial hypertension in patients with thrombophilia. ...
Miscellaneous Congenital Cardiac Conditions * Aneurysm of the Sinus of Valsalva * Anomalous Origin of the Left Coronary Artery from the Pulmonary Artery (Bland-White-Garland Syndrome, ALCAPA Syndrome) * Aortopulmonary Septal Defect * Arteriovenous Fistula, Coronary * Arteriovenous Fistula, Pulmonary * Arteriovenous Fistula, Systemic * Atrial Septal Aneurysm * Cervical Aortic Arch * Common Atrium * Cor Triatriatum * DiGeorge Syndrome * Double-Chambered Right Ventricle * Ectopia Cordis * Hemitruncus Arteriosus * Idiopathic Dilation of the Pulmonary Artery * Kartagener Syndrome * Parachute Mitral Valve * Patent Foramen Ovale * Pericardial Defect, Congenital * Pseudocoarctation of the Aorta * Pulmonary Artery Stenosis * Scimitar Syndrome * Systemic Venous ...
Treatment for fistula varies depending on the cause and extent of the fistula, but often involves surgical intervention combined with antibiotic therapy. Typically the first step in treating a fistula is an examination by a doctor to determine the extent and "path" that the fistula takes through the tissue. In some cases the fistula is temporarily covered, for example a fistula caused by cleft palate is often treated with a palatal obturator to delay the need for surgery to a more appropriate age. Surgery is often required to assure adequate drainage of the fistula (so that pus may escape without forming an abscess). Various surgical procedures are commonly used, most commonly fistulotomy, placement of a seton (a cord that is passed through the path of the fistula to keep it open for draining), or an endorectal flap procedure (where healthy tissue is pulled over the internal side of the fistula to keep feces or other material from reinfecting the channel). Treatment involves filling the fistula ...
She recalls one case that made the headlines, where a woman suffering from fistula was about to be burnt alive by her community. She managed to convince the womans family and community to desist and take her instead to the Hamlin Fistula Centre in Bahirdar, then later to the fistula centre at Gondar University Hospital for treatment. The outcome was positive.. "More than 50 women have been treatment since and each of them in turn convinced fistula patients in their communities to seek treatment," Genet says proudly.. The fistula centre at Gondar University Hospital is among three such centres that UNFPA, the United Nations Population Fund, is supporting in the country to treat obstetric fistula patients. The support takes the form of provision of medical equipment used for the treatment. The Fund contributes US$100 for the treatment of each fistula patient. To date, more than 2000 fistula patients and around 400 women suffering from uterine prolapse have been repaired over the past few years. ...
Expertise, Disease and Conditions: Aneurysmal Subarachnoid Hemorrhage (ASH), Arteriovenous Malformations (AVM), Brain Cancer, Brain Hemorrhage, Brain Tumors, Carotid Artery Stenosis, Cavernous Malformations, Cerebellar Ataxia, Cerebral Aneurysms, Cerebral Revascularization, Cerebrovascular Diseases, Cervical Degenerative Disc Disease, Chiari Malformations, Complex Skull Reconstruction, Cranioplasty, Dural Arteriovenous Fistulas, Intracerebral Hemorrhage, Moyamoya Disease, Neurosurgery, Spinal Vascular ...
A 67-year-old woman was admitted to our hospital for examination of a chest X-ray abnormality. Chest computed tomography and coronary angiography revealed a giant aneurysm and coronary-pulmonary artery fistula originating from both the proximal left anterior descending and the right coronary artery. The fistula was ligated and the aneurysm was resected by means of extracorporeal circulation. The postoperative course was uneventful. Computed tomography and coronary angiography showed that the aneurysm and coronary-pulmonary artery fistula had completely disappeared ...
Arteriovenous fistula (AVF) : a lesion with a direct communication via fistulae between an artery and a vein.[2] ... CM-AVM: capillary malformation- arteriovenous malformation[13]. Terminology[edit]. Correct term. Incorrect terminology commonly ... Arteriovenous malformation : a lesion with a direct connection between an artery and a vein, without an intervening capillary ...
Arteriovenous malformations (AVMs) and arteriovenous fistulas (AVFs) are caused by RASA1 mutations as well. Therefore, if all ... When abnormalities such as: vascular malformation, capillary arteriovenous malformations (AVMs), arteriovenous fistulas (AVFs) ... "Arteriovenous fistula, Mayo Clinic". "capillary malformation-arteriovenous malformation syndrome, NIH Genetics Home Reference ... Peripheral arteriovenous fistula: abnormal communication between artery and vein that is a direct result of the abnormal ...
An arteriovenous fistula can increase preload. Preload is also affected by two main body "pumps." The Respiratory pump - ...
Traumatic aneurysms and arteriovenous fistulas in Nigeria. Clinical aspects of pulmonary and pleural carcinoma in Nigeria. ... Anyanwu, CH; Ude, AC; Swarup, AS; Umerah, BC; Udekwu, FA (August 1980). "Traumatic aneurysms and arteriovenous fistulas in ...
Primary cause has been regarded arteriovenous fistula within bone. The lesion may arise de novo or may arise secondarily within ...
Recent[when?] investigations have established that both moyamoya disease and arteriovenous fistulas (AVFs) of the lining of the ... At least one case of simultaneous unilateral moyamoya syndrome and ipsilateral dural arteriovenous fistula has been reported at ... "Simultaneous unilateral moyamoya disease and ipsilateral dural arteriovenous fistula: case report". Neurosurgery. 62 (6): E1375 ...
Vascular disease Vascular anomaly Arteriovenous fistula Telangiectasia "Vascular Malformations of the CNS". ... There are many types, but the most common is arteriovenous malformation. It may cause aesthetic problems as it has a growth ...
Linton R. R.; White P. D. (1945). "Arteriovenous Fistula Between The Right Common Iliac Artery And The Inferior Vena Cava". ...
AV (arteriovenous) fistulas are recognized as the preferred access method. To create a fistula, a vascular surgeon joins an ... an arteriovenous fistula (AV) or a synthetic graft. In the latter two, needles are used to puncture the graft or fistula each ... the arteriovenous fistula. In spite of AV Fistula being one of the most preferred methods of Vascular access, the researchers ... fistula'), the forearm (usually a radiocephalic fistula, or so-called Brescia-Cimino fistula, in which the radial artery is ...
... such as an arteriovenous fistula or synthetic vascular graft-AV fistula) that was installed to provide access for the inflow ... Anderson CB, Groce MA (1975). "Banding of arteriovenous dialysis fistulas to correct high-output cardiac failure". Surgery. 78 ... DASS occurs in about 1% of AV fistulas and 2.7-8% of PTFE grafts. Arteriography The fistula flow can be restricted through ... the fistula is ligated, and a new fistula is created in a more proximal location in the same limb, or in the contralateral limb ...
Schanzer H, Schwartz M, Harrington E, Haimov M (1988). "Treatment of ischemia due to "steal" by arteriovenous fistula with ...
Predominantly fibroadipose tissue produced in association with arteriovenous fistulas or localized hyperplastic vascular and ...
June 2004). "Acute arterio-venous fistula occlusion decreases sympathetic activity and improves baroreflex control in kidney ... is if pressure is applied to a artery proximal to an arteriovenous fistula, swelling reduces in size,bruit and thrill will ...
Jonathan Alan Borden is an American neurosurgeon who developed the Borden Classification of Dural Arteriovenous Fistulas. He ... At Tufts-New England Medical Center he developed the Borden Classification of Dural Arteriovenous Fistulas. This classification ... "The validity of classification for the clinical presentation of intracranial dural arteriovenous fistulas". Journal of ... Borden JA, Wu JK, Shucart WA (February 1995). "A proposed classification for spinal and cranial dural arteriovenous fistulous ...
Finally, the biopsy needle may join an artery and vein in the kidney, resulting in the formation of an arteriovenous fistula. ... These include hydronephrosis, pre-existing arteriovenous fistula in the kidney, cystic kidney disease and small, shrunken ... In these instances, the fistula may be closed surgically or with angioembolisation. Iversen P, Brun C (September 1951). " ...
doi:10.1053/j.tvir.2013.08.007 Barney Brooks, The Treatment of Traumatic Arteriovenous Fistula, Southern Medical Journal. 01/ ... 1930 - First therapeutic embolization procedure (of a carotid-cavernous fistula); described by Brooks. 1960s - Radioisotopes ...
Partial list: Endovascular repair of a traumatic arteriovenous fistula 34 years after the injury: report of a case. Donald T ... 2006 Sep ;44 (3):453-459 16950415 (P,S,E,B) PMID 16950415 Evolving strategies for the treatment of aortoenteric fistulas. ...
Epub 2011 Jul 8. PubMed PMID 21740182 Nikfarjam J, Taub PJ, Patel A, Rose E. Arteriovenous fistula following radial forearm ...
"A case of arteriovenous fistulae secondary to renal cell carcinoma accompanied by congestive heart failure". Hinyokika kiyo. ...
... such as an arteriovenous fistula) or innate (such as the arteriovenous shunt of a metarteriole); and it may be natural (such as ... Traumatic intestinal fistulas usually occur between two loops of intestine (entero-enteric fistula) or intestine and skin ( ... These are usually referred to as fistulas. In the cases of veins or arteries, traumatic fistulas usually occur between artery ... Anastomoses that are abnormal, whether congenital or acquired, are often called fistulas. The term is used in medicine, biology ...
There is disagreement as to how cases of KTS should be classified if there is an arteriovenous fistula present. Although ...
The arteriovenous shunt in the glomus body is a normal anatomic shunt as opposed to an abnormal arteriovenous fistula. A ... The glomus body consists of an arteriovenous shunt surrounded by a capsule of connective tissue. Glomus bodies are most ... These glomus bodies control small arteriovenous shunts or anastomoses. ...
An anastomosis connecting an artery to a vein is also used to create an arteriovenous fistula as an access for hemodialysis. ...
... an arteriovenous fistula is created (more specifically, a carotid-cavernous fistula). Lesions affecting the cavernous sinus may ... carotid-cavernous fistula, bacterial infection causing cavernous sinus thrombosis, aseptic thrombosis, idiopathic granulomatous ...
Coronary arteriovenous fistula, acquired. *(I28.0) Arteriovenous fistula of pulmonary vessels *Pulmonary arteriovenous fistula ... K60) Anal and rectal fissures and fistulas *(K60.3) Anal fistula. *(K60.5) Anorectal fistula (fecal fistula, fistula-in-ano): ... N64.0) Fistula of nipple. *(N82) Fistulae involving female genital tract / Obstetric fistula *(N82.0) Vesicovaginal fistula: ... The Latin word fistula (plural fistulas or fistulae /-li, -laɪ/) literally means tube or pipe. ...
Examples are arteriovenous fistulae or aneurysms (with or without thrombosis), biliary fistulae or aneurysms, sclerosing ...
Arteriovenous fistula. *Arteriovenous malformation. *Telangiectasia *Hereditary hemorrhagic telangiectasia. Vascular nevus. * ...
November 27, 1986 ; "The New England Journal of Medicine" ; PMID 2945989 "Vein graft arteriovenous fistula for long-term venous ...
Coronary-pulmonary artery fistula is an uncommon cardiac anomaly, usually congenital. Most coronary-pulmonary artery fistulas ... This report describes a case of complex coronary-pulmonary artery fistula with two feeding vessels of separate origins: one ... The complex anatomy of the fistula was shown in detail by multidetector computed tomography using multiplanar reconstruction ...
Definition An arteriovenous fistula (AV fistula) is the connection of a vein and an artery, usually in the forearm, to allow ... Arteriovenous fistula. Definition. An arteriovenous fistula (AV fistula) is the connection of a vein and an artery, usually in ... Arteriovenous Fistula. Definition. An arteriovenous fistula is an abnormal channel or passage between an artery and a vein. ... Arteriovenous fistula. Definition. An arteriovenous fistula is an abnormal channel or passage between an artery and a vein. ...
Arteriovenous fistula, abnormal direct opening between an artery and a vein; it sometimes results from accidental penetration ... As a result of the defect, the arterial blood is passed to the venous side of the fistula, and the blood ... arteriovenous fistulaAn arteriovenous fistula of the superior sagittal sinus in the brain. The fistula is draining into ... Alternative Title: arteriovenous aneurysm. Arteriovenous fistula, abnormal direct opening between an artery and a vein; it ...
Pulmonary arteriovenous fistula is an abnormal connection between an artery and vein in the lungs. As a result, blood passes ... Pulmonary arteriovenous fistula is an abnormal connection between an artery and vein in the lungs. As a result, blood passes ... Pulmonary arteriovenous fistulas are usually the result of abnormal development of the blood vessels of the lung. Most occur in ... When arteriovenous fistulas are caused by liver disease, the treatment is a liver transplant. ...
Arteriovenous fistula after hair transplantation.. Br Med J 1978; 1 doi: https://doi.org/10.1136/bmj.1.6109.340 (Published 11 ...
... Matthew K. Edwards,1 Erica N. Christenson,1 Brian M. Corliss,2 Adam J. ... Cervical vertebral AV fistulae are uncommon vascular lesions involving abnormal communication between the extradural vertebral ... We examine the case of a female evaluated in the emergency department with a vertebral AV fistula presenting classically as ... A discussion on the etiology, pathophysiology, and management of vertebral AV fistulae follows. ...
Arteriovenous fistula Open pop-up dialog box Close Arteriovenous fistula. Arteriovenous fistula. An arteriovenous (AV) fistula ... An arteriovenous fistula in your lungs (pulmonary arteriovenous fistula) is a serious condition and can cause:. *A bluish tinge ... Causes of arteriovenous fistulas include:. * Cardiac catheterization. An arteriovenous fistula may develop as a complication of ... Arteriovenous fistulas usually occur in the legs, but can develop anywhere in the body. Arteriovenous fistulas are often ...
... *A dural arteriovenous fistula (DAVF) is an abnormal connection between the arteries that ... A dural arteriovenous fistula (DAVF) results when the blood vessels that normally supply the scalp and coverings of the brain ( ...
... Matthew K. Edwards,1 Erica N. Christenson,1 Brian M. ... Comment on "Vertebral Arteriovenous Fistula: An Unwelcome Thrill", Stephen M. Foreman and Michael J. Stahl Case Reports in ... S. M. Foreman and M. J. Stahl, "Comment on "Vertebral Arteriovenous Fistula: An Unwelcome Thrill"," Case Reports in Emergency ... Vertebral Arteriovenous Fistula: An Unwelcome Thrill, Matthew K. Edwards, Erica N. Christenson, Brian M. Corliss, Adam J. ...
Arteriovenous Fistula Tissue Bank. The safety and scientific validity of this study is the responsibility of the study sponsor ... Arteriovenous Fistula Tissue Bank. Brief Summary This project will bank sera, DNA and vascular specimens from patients ... Patients will be eligible if they are 19 years of age or greater and have placement of an arteriovenous fistula planned witin ...
Letter: Swelling of arm in patients with arteriovenous fistula. Br Med J 1974; 3 :629 ... Letter: Swelling of arm in patients with arteriovenous fistula.. Br Med J 1974; 3 doi: https://doi.org/10.1136/bmj.3.5931.629-c ...
Fistula. Renal Insufficiency. Kidney Failure, Chronic. Arteriovenous Fistula. Pathological Conditions, Anatomical. Kidney ... Arteriovenous Fistula Tissue Bank. The recruitment status of this study is unknown. The completion date has passed and the ... Patients will be eligible if they are 19 years of age or greater and have placement of an arteriovenous fistula planned witin ... Arteriovenous Malformations. Vascular Malformations. Cardiovascular Abnormalities. Cardiovascular Diseases. Vascular Fistula. ...
... and fistula (AVF) symptoms, and the treatments available at UPMC for these vascular malformations of the spine. ... Two of the most common types are arteriovenous malformations (AVMs) and arteriovenous fistulas (AVFs). ... Two of the most common types are arteriovenous malformations (AVMs) and arteriovenous fistulas (AVFs). ...
Read more about Dural Arteriovenous Fistula symptoms and treatment options available at UPMC, a world leader in neurosurgery. ... Dural Arteriovenous Fistula (dAVF). Dr. Bradley Gross discusses dural arteriovenous fistula (dAVF) symptoms, diagnosis, and ... What Is a Dural Arteriovenous Fistula?. Dural arteriovenous fistulas (dAVFs) are rare, abnormal connections between arteries ... Fistula Cavernous Carotid Fistula Brain Aneurysm Cerebral Cavernous Malformation Dural Arteriovenous Fistula Extracranial/ ...
Most often, the fistulas are due to rupture of an aneurysm of the hepati ... A case of the rare portosystemic arteriovenous fistula is presented. This lesion, although basically simple, is not trivial. ... Arteriovenous Fistula / surgery*. Humans. Ligation. Male. Middle Aged. Portal System / radiography, surgery*. ... A case of the rare portosystemic arteriovenous fistula is presented. This lesion, although basically simple, is not trivial. ...
An adult case of congenital external carotid-jugular arteriovenous fistula with reversible circulatory insufficiency in the ... Cavagna E, DAndrea P, Schiavon F, Tarroni G. Failing hemodialysis arteriovenous fistula and percutaneous treatment: imaging ... Congestive failure in the newborn caused by cerebral A-V fistula; a clinical and pathological report of two cases. AMA Am J Dis ... Congenital arteriovenous communications. Surg Gynecol Obstet. 1928;46:470-83.Google Scholar ...
Dural arteriovenous fistula (dAVF). Dural arteriovenous fistula (dAVF). Dural arteriovenous fistulas are abnormal connections ... Dural arteriovenous fistulas (dAVFs) are abnormal connections between an artery and a vein in the tough covering over the brain ... Most dural arteriovenous fistulas have no clear origin, although some result from identifiable causes such as traumatic head ... Dural arteriovenous fistulas: A review of the literature and a presentation of a single institutions experience. World ...
The following tests may be used to diagnose your dural arteriovenous fistulae (DAVF) and help identify its size, location and ... Dural Arteriovenous Fistulae. Diagnosis The following tests may be used to diagnose your dural arteriovenous fistulae (DAVF) ...
Dural arteriovenous fistulas (DAVFs) are rare, abnormal connections between arteries and veins in the protective membrane ... Dural Arteriovenous Fistulae Dural arteriovenous fistulas (DAVFs) are rare, abnormal connections between arteries and veins in ... Our Approach to Dural Arteriovenous Fistulae. At UCSF, dural arteriovenous fistulas are diagnosed and treated by an expert team ... DAVFs are part of a group of conditions called arteriovenous malformations.. An unusually heavy blood flow can lead to ...
Spontaneous closure of selected iatrogenic pseudoaneurysms and arteriovenous fistulae. J Vasc Surg. 1997;25:803-808. ... Femoral Pseudoaneurysm With a Communicating Arteriovenous Fistula. A Complication After Percutaneous Coronary Intervention. Mai ... However, in patients who develop symptoms indicating disease progression or the pseudoaneurysm/arteriovenous fistula fails to ... and arteriovenous fistula (blue) in full length as 2 parallel tracts, shunting blood from the common femoral artery to the ...
... fistulas are the most commonly encountered vascular malformation of the spinal cord and a treatable cause for progressive para ... Arteriovenous Fistula / diagnosis*, therapy*. Dura Mater / blood supply. Embolization, Therapeutic*. Humans. Spinal Cord / ... Spinal dural arteriovenous (AV) fistulas are the most commonly encountered vascular malformation of the spinal cord and a ... 16079948 - Closure of a surgically created arteriovenous fistula with a covered stent-graft in a p.... 8434468 - Interventional ...
showing the surgical approach to the arteriovenous fistula on the lateral aspect of the brain stem and exposure of the fistula ... S pinal dural arteriovenous fistulas (AVFs) comprise 80 to 85% of spinal arteriovenous malformations. 18 Typically these ... Intracranial pial arteriovenous fistulas with single-vein drainage Report of three cases and review of the literature ... The literature is reviewed and it is proposed that a new category - Type IV, a direct arteriovenous fistula involving the ...
... an intracerebral arteriovenous fistula can rupture causing subarachnoid hemorrhage. When an arteriovenous fistula is formed ... When the vein is large enough to allow cannulation, the fistula is defined as "mature". An arteriovenous fistula can increase ... Arteriovenous malformation Branham sign Carotid-cavernous fistula Fistula Human umbilical vein graft Pseudoaneurysm Vascular ... An arteriovenous fistula is an abnormal connection or passageway between an artery and a vein. It may be congenital, surgically ...
Brachial Arteriovenous Fistula As a Complication of Placement of a Peripherally Inserted Central Venous Catheter: A Case Report ... Duplex ultrasound confirmed the diagnosis of a brachial artery-to-brachial vein arteriovenous fistula (AVF), and the patient ... a case of a 25-year-old woman with a history of difficult PICC line placement that presented with an arteriovenous fistula in ...
Pulmonary arteriovenous malformations (PAVMs) were first described in 1897. They consist of abnormal communications between the ... encoded search term (Pulmonary Arteriovenous Fistulae) and Pulmonary Arteriovenous Fistulae What to Read Next on Medscape. ... Pulmonary Arteriovenous Fistulae Follow-up. Updated: Jan 29, 2015 * Author: Barry A Love, MD; Chief Editor: Howard S Weber, MD ... Pulmonary arteriovenous fistulas: Mayo Clinic experience, 1982-1997. Mayo Clin Proc. 1999 Jul. 74(7):671-80. [Medline]. ...
  • Percutaneous interventional closure of large pulmonary arteriovenous fistulas with the amplatzer duct occluder. (medscape.com)
  • Renal arteriovenous fistula (rAVF) is an uncommon condition, usually iatrogenic and in most cases caused by percutaneous renal needle biopsy. (scielo.org.za)
  • To evaluate the effect of percutaneous transluminal angioplasty (PTA) on haemodialysis fistulas utilising drug-coated balloons with plain balloon vessel preparation (DCB). (springer.com)
  • Fifty-nine patients with dysfunctional arteriovenous fistulas that were referred for percutaneous transluminal angioplasty were enrolled prospectively between January of 2010 and July of 2012. (nih.gov)
  • Percutaneous transluminal angioplasty has long been used in the treatment of stenoses of arteriovenous fistulae. (oup.com)
  • Intravascular ultrasound studies were performed in 40 haemodialysis patients with 63 stenoses in arteriovenous fistulae who had percutaneous transluminal angioplasty. (oup.com)
  • The results further suggest that the mechanism of expansion of arteriovenous fistulae stenoses by percutaneous transluminal angioplasty involves stretching of the vessel wall as well as plaque fractures. (oup.com)
  • Large arteriovenous fistulae (AVF) can lead to congestive heart failure associated with increased activity of vasoconstrictor neurohormonal systems, the renin-angiotensin , sympathetic nervous system , endothelin system, and Arginine vasopressin . (wikidoc.org)
  • Congenital Arteriovenous Fistula of the Renal Vessels: An Exceptional Cause of Congestive Heart Failure in the Elderly: A Case Report. (ebscohost.com)
  • We report the case of a femoral arteriovenous fistula in a young male, who had a firearm wound in his left thigh causing high-output congestive heart failure. (scielo.br)
  • A case of a 60-year-old Chinese man who presented with iatrogenic carotid-jugular fistula with multiple fistulous points was re. (bioportfolio.com)
  • A case of iatrogenic arteriovenous fistula after pacemaker lead extraction. (elsevier.com)
  • The arteriovenous fistula was probably iatrogenic as it was not seen on the ultrasound at the time of renal biopsy a few years earlier. (jbsr.be)
  • The report then estimates 2017-2022 market development trends of Arteriovenous Fistula Drug industry. (researchmoz.us)
  • A large untreated arteriovenous fistula can lead to serious complications. (mayoclinic.org)
  • Early detection of an arteriovenous fistula may make your condition easier to treat and may reduce your risk of developing complications, such as blood clots or, in severe cases, heart failure. (mayoclinic.org)
  • Congenital fistulas need no treatment unless significant complications develop (eg, leg lengthening in a growing child). (merckmanuals.com)
  • Complications arising from a functional arteriovenous fistula (AVF) in successful kidney transplant recipients (KT) have been overlooked despite some reports of its deleterious effect on heart, lungs, and kidney allograft. (readbyqxmd.com)
  • Left untreated, an arteriovenous fistula can cause complications, some of which can be serious. (pharmacypedia.org)
  • The treatment of these spinal perimedullary AVFs involves interruption of the fistula usually in the perimedullary location either by endovascular or microsurgical routes. (cureus.com)
  • The arteriovenous fistula (AVF) is the preferred method of long-term haemodialysis. (ovid.com)
  • An arteriovenous fistula (AVF) involving a major artery such as the abdominal aorta can lead to a large decrease in peripheral resistance , which in turn causes the heart to increase cardiac output in order to maintain proper blood flow to all tissues . (wikidoc.org)
  • When an arteriovenous fistula is formed involving a major artery like the abdominal aorta, it can lead to a large decrease in peripheral resistance. (wikipedia.org)
  • Arteriovenous fistula formation in a volunteer allogeneic peripheral blood progenitor cell donor. (ebscohost.com)
  • A peripheral arteriography was performed, depicting the extension and location of the arteriovenous fistula in the middle third of the left thigh, measuring approximately 12 mm of extension ( fig. 1 ). (scielo.br)
  • We report the case of a 21-year-old male with high-output heart failure due to a femoral arteriovenous fistula caused by a firearm wound. (scielo.br)
  • Endoluminal repair of the femoral arteriovenous fistula was performed with a metallic prosthesis covered with polytetrafluorethylene (PTFE). (scielo.br)
  • An arteriography was performed and showed a high-output femoral arteriovenous fistula in the middle third of the left thigh, measuring about 12mm. (scielo.br)
  • After that, we dissected the left femoral artery and proceeded to an anterograde puncture with direct view, inserting the 9F introducer and directing it to the fistula. (scielo.br)
  • Objective To explore the possibility of establishment of experimental femoral pseudoaneurysm (PA) and traumatic arteriovenous fistula (tAVF) models in 40 rabbits and its related study. (cnki.com.cn)
  • In most rabbits with arteriovenous shunts, a small area of the inferior vena cava near the fistula was devoid of endothelium, covered with a thin deposit of mural thrombi, and considered to be a jet lesion. (ahajournals.org)
  • Color Doppler ultrasound (US) is useful for screening for renal arteriovenous (AV) shunts, especially following renal biopsy, because of its convenience and minimally invasive nature. (jbsr.be)
  • Renal arteriovenous (AV) shunts, a rare pathologic condition, are divided into two categories, traumatic and nontraumatic, and can cause massive hematuria, retroperitoneal hemorrhage, pain and high-output heart failure. (jbsr.be)
  • 4 The present combined pseudoaneurysm and arteriovenous fistula resolved spontaneously within 3 weeks despite antithrombotic treatment with acetylsalicylic acid and clopidogrel. (ahajournals.org)
  • Ray CE Jr et al: Endovascular repair of a large post-traumatic calf pseudoaneurysm and arteriovenous fistula. (statdx.com)
  • A catheter is passed through the groin up into the arteries in the brain that lead to the arteriovenous fistula and inject liquid embolic agents such as NBCA, glue or Onyx into these arteries. (pietromortini.com)
  • Pulmonary arteriovenous fistula in the newborn: a case report of Rendu-Osler-Weber syndrome and a review of the literature. (semanticscholar.org)
  • We report the case of an intraoperatively dislodged transforaminal lumbar interbody fusion spacer with creation of a traumatic arteriovenous fistula and device migration to the pulmonary artery. (readbyqxmd.com)