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.
Device constructed of either synthetic or biological material that is used for the repair of injured or diseased blood vessels.
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.
The degree to which BLOOD VESSELS are not blocked or obstructed.
Surgical insertion of BLOOD VESSEL PROSTHESES to repair injured or diseased blood vessels.
Surgical shunt allowing direct passage of blood from an artery to a vein. (From Dorland, 28th ed)
The continuation of the femoral artery coursing through the popliteal fossa; it divides into the anterior and posterior tibial arteries.
Obstruction of flow in biological or prosthetic vascular grafts.
The main artery of the thigh, a continuation of the external iliac artery.
Surgical union or shunt between ducts, tubes or vessels. It may be end-to-end, end-to-side, side-to-end, or side-to-side.
Artificial substitutes for body parts, and materials inserted into tissue for functional, cosmetic, or therapeutic purposes. Prostheses can be functional, as in the case of artificial arms and legs, or cosmetic, as in the case of an artificial eye. Implants, all surgically inserted or grafted into the body, tend to be used therapeutically. IMPLANTS, EXPERIMENTAL is available for those used experimentally.
Biocompatible materials usually used in dental and bone implants that enhance biologic fixation, thereby increasing the bond strength between the coated material and bone, and minimize possible biological effects that may result from the implant itself.
The plan and delineation of prostheses in general or a specific prosthesis.
Pathological processes consisting of the union of the opposing surfaces of a wound.
Synthetic or natural materials, other than DRUGS, that are used to replace or repair any body TISSUES or bodily function.
Techniques for securing together the edges of a wound, with loops of thread or similar materials (SUTURES).
The vein which drains the foot and leg.
A group of thermoplastic or thermosetting polymers containing polyisocyanate. They are used as ELASTOMERS, as coatings, as fibers and as foams.
Veins in the neck which drain the brain, face, and neck into the brachiocephalic or subclavian veins.
The anterior and posterior arteries created at the bifurcation of the popliteal artery. The anterior tibial artery begins at the lower border of the popliteus muscle and lies along the tibia at the distal part of the leg to surface superficially anterior to the ankle joint. Its branches are distributed throughout the leg, ankle, and foot. The posterior tibial artery begins at the lower border of the popliteus muscle, lies behind the tibia in the lower part of its course, and is found situated between the medial malleolus and the medial process of the calcaneal tuberosity. Its branches are distributed throughout the leg and foot.
Any woven or knit material of open texture used in surgery for the repair, reconstruction, or substitution of tissue. The mesh is usually a synthetic fabric made of various polymers. It is occasionally made of metal.
Tumor-like sterile accumulation of serum in a tissue, organ, or cavity. It results from a tissue insult and is the product of tissue inflammation. It most commonly occurs following MASTECTOMY.
The vessels carrying blood away from the capillary beds.
A repeat operation for the same condition in the same patient due to disease progression or recurrence, or as followup to failed previous surgery.
Materials used in closing a surgical or traumatic wound. (From Dorland, 28th ed)
An increase in the number of cells in a tissue or organ without tumor formation. It differs from HYPERTROPHY, which is an increase in bulk without an increase in the number of cells.
Surgical insertion of BLOOD VESSEL PROSTHESES, or transplanted BLOOD VESSELS, or other biological material to repair injured or diseased blood vessels.
An autologous or commercial tissue adhesive containing FIBRINOGEN and THROMBIN. The commercial product is a two component system from human plasma that contains more than fibrinogen and thrombin. The first component contains highly concentrated fibrinogen, FACTOR VIII, fibronectin, and traces of other plasma proteins. The second component contains thrombin, calcium chloride, and antifibrinolytic agents such as APROTININ. Mixing of the two components promotes BLOOD CLOTTING and the formation and cross-linking of fibrin. The tissue adhesive is used for tissue sealing, HEMOSTASIS, and WOUND HEALING.
The vein accompanying the femoral artery in the same sheath; it is a continuation of the popliteal vein and becomes the external iliac vein.
The outermost of the three MENINGES, a fibrous membrane of connective tissue that covers the brain and the spinal cord.
Either of two large arteries originating from the abdominal aorta; they supply blood to the pelvis, abdominal wall and legs.
Pathological processes which result in the partial or complete obstruction of ARTERIES. They are characterized by greatly reduced or absence of blood flow through these vessels. They are also known as arterial insufficiency.
The continuation of the subclavian artery; it distributes over the upper limb, axilla, chest and shoulder.
Catheters designed to be left within an organ or passage for an extended period of time.
The testing of materials and devices, especially those used for PROSTHESES AND IMPLANTS; SUTURES; TISSUE ADHESIVES; etc., for hardness, strength, durability, safety, efficacy, and biocompatibility.
Polymers of silicone that are formed by crosslinking and treatment with amorphous silica to increase strength. They have properties similar to vulcanized natural rubber, in that they stretch under tension, retract rapidly, and fully recover to their original dimensions upon release. They are used in the encapsulation of surgical membranes and implants.
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.
The innermost layer of an artery or vein, made up of one layer of endothelial cells and supported by an internal elastic lamina.
Therapy for the insufficient cleansing of the BLOOD by the kidneys based on dialysis and including hemodialysis, PERITONEAL DIALYSIS, and HEMODIAFILTRATION.
A hernia caused by weakness of the anterior ABDOMINAL WALL due to midline defects, previous incisions, or increased intra-abdominal pressure. Ventral hernias include UMBILICAL HERNIA, incisional, epigastric, and spigelian hernias.
Propylene or propene polymers. Thermoplastics that can be extruded into fibers, films or solid forms. They are used as a copolymer in plastics, especially polyethylene. The fibers are used for fabrics, filters and surgical sutures.
The aorta from the DIAPHRAGM to the bifurcation into the right and left common iliac arteries.
Summarizing techniques used to describe the pattern of mortality and survival in populations. These methods can be applied to the study not only of death, but also of any defined endpoint such as the onset of disease or the occurrence of disease complications.
A hypoperfusion of the BLOOD through an organ or tissue caused by a PATHOLOGIC CONSTRICTION or obstruction of its BLOOD VESSELS, or an absence of BLOOD CIRCULATION.
The outer margins of the ABDOMEN, extending from the osteocartilaginous thoracic cage to the PELVIS. Though its major part is muscular, the abdominal wall consists of at least seven layers: the SKIN, subcutaneous fat, deep FASCIA; ABDOMINAL MUSCLES, transversalis fascia, extraperitoneal fat, and the parietal PERITONEUM.
Artificially produced membranes, such as semipermeable membranes used in artificial kidney dialysis (RENAL DIALYSIS), monomolecular and bimolecular membranes used as models to simulate biological CELL MEMBRANES. These membranes are also used in the process of GUIDED TISSUE REGENERATION.
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.
Control of bleeding during or after surgery.
Formation and development of a thrombus or blood clot in the blood vessel.
Transducers that are activated by pressure changes, e.g., blood pressure.
Elements of limited time intervals, contributing to particular results or situations.
A mixture of metallic elements or compounds with other metallic or metalloid elements in varying proportions.
The inferior part of the lower extremity between the KNEE and the ANKLE.
Devices that provide support for tubular structures that are being anastomosed or for body cavities during skin grafting.
Operative procedures for the treatment of vascular disorders.
The tendinous cords that connect each cusp of the two atrioventricular HEART VALVES to appropriate PAPILLARY MUSCLES in the HEART VENTRICLES, preventing the valves from reversing themselves when the ventricles contract.
The tunnel in the lower anterior ABDOMINAL WALL through which the SPERMATIC CORD, in the male; ROUND LIGAMENT, in the female; nerves; and vessels pass. Its internal end is at the deep inguinal ring and its external end is at the superficial inguinal ring.
An alternative to amputation in patients with neoplasms, ischemia, fractures, and other limb-threatening conditions. Generally, sophisticated surgical procedures such as vascular surgery and reconstruction are used to salvage diseased limbs.
The domestic dog, Canis familiaris, comprising about 400 breeds, of the carnivore family CANIDAE. They are worldwide in distribution and live in association with people. (Walker's Mammals of the World, 5th ed, p1065)
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.
A condition that occurs when the obstruction of the thin-walled SUPERIOR VENA CAVA interrupts blood flow from the head, upper extremities, and thorax to the RIGHT ATRIUM. Obstruction can be caused by NEOPLASMS; THROMBOSIS; ANEURYSM; or external compression. The syndrome is characterized by swelling and/or CYANOSIS of the face, neck, and upper arms.
The removal of a limb or other appendage or outgrowth of the body. (Dorland, 28th ed)
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.
Artificial substitutes for body parts and materials inserted into organisms during experimental studies.
A genus of the subfamily CERCOPITHECINAE, family CERCOPITHECIDAE, consisting of five named species: PAPIO URSINUS (chacma baboon), PAPIO CYNOCEPHALUS (yellow baboon), PAPIO PAPIO (western baboon), PAPIO ANUBIS (or olive baboon), and PAPIO HAMADRYAS (hamadryas baboon). Members of the Papio genus inhabit open woodland, savannahs, grassland, and rocky hill country. Some authors consider MANDRILLUS a subgenus of Papio.
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.
The condition of an anatomical structure's being constricted beyond normal dimensions.
The excision of the thickened, atheromatous tunica intima of a carotid artery.
A region of the lower extremity immediately surrounding and including the KNEE JOINT.
Apparatus that provides mechanical circulatory support during open-heart surgery, by passing the heart to facilitate surgery on the organ. The basic function of the machine is to oxygenate the body's venous supply of blood and then pump it back into the arterial system. The machine also provides intracardiac suction, filtration, and temperature control. Some of the more important components of these machines include pumps, oxygenators, temperature regulators, and filters. (UMDNS, 1999)
Chronic inflammation and granuloma formation around irritating foreign bodies.
Malfunction of implantation shunts, valves, etc., and prosthesis loosening, migration, and breaking.
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.
General disorders of the sclera or white of the eye. They may include anatomic, embryologic, degenerative, or pigmentation defects.
Any operation on the cranium or incision into the cranium. (Dorland, 28th ed)
A congenital abnormality characterized by the elevation of the DIAPHRAGM dome. It is the result of a thinned diaphragmatic muscle and injured PHRENIC NERVE, allowing the intra-abdominal viscera to push the diaphragm upward against the LUNG.
Organs, tissues, or cells taken from the body for grafting into another area of the same body or into another individual.
Removal of an implanted therapeutic or prosthetic device.
The venous trunk which receives blood from the lower extremities and from the pelvic and abdominal organs.
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.
Microscopy in which the object is examined directly by an electron beam scanning the specimen point-by-point. The image is constructed by detecting the products of specimen interactions that are projected above the plane of the sample, such as backscattered electrons. Although SCANNING TRANSMISSION ELECTRON MICROSCOPY also scans the specimen point by point with the electron beam, the image is constructed by detecting the electrons, or their interaction products that are transmitted through the sample plane, so that is a form of TRANSMISSION ELECTRON MICROSCOPY.
Substances used to cause adherence of tissue to tissue or tissue to non-tissue surfaces, as for prostheses.
The region of the lower limb in animals, extending from the gluteal region to the FOOT, and including the BUTTOCKS; HIP; and LEG.
Reconstruction or repair of a blood vessel, which includes the widening of a pathological narrowing of an artery or vein by the removal of atheromatous plaque material and/or the endothelial lining as well, or by dilatation (BALLOON ANGIOPLASTY) to compress an ATHEROMA. Except for ENDARTERECTOMY, usually these procedures are performed via catheterization as minimally invasive ENDOVASCULAR PROCEDURES.
The maximum stress a material subjected to a stretching load can withstand without tearing. (McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed, p2001)
A broad family of synthetic organosiloxane polymers containing a repeating silicon-oxygen backbone with organic side groups attached via carbon-silicon bonds. Depending on their structure, they are classified as liquids, gels, and elastomers. (From Merck Index, 12th ed)
Procedures used to reconstruct, restore, or improve defective, damaged, or missing structures.
Neoplasms located in the vasculature system, such as ARTERIES and VEINS. They are differentiated from neoplasms of vascular tissue (NEOPLASMS, VASCULAR TISSUE), such as ANGIOFIBROMA or HEMANGIOMA.
Surgical insertion of a prosthesis.
Surgical removal of an obstructing clot or foreign material from a blood vessel at the point of its formation. Removal of a clot arising from a distant site is called EMBOLECTOMY.
Characteristics or attributes of the outer boundaries of objects, including molecules.
Use of a balloon catheter for dilation of an occluded artery. It is used in treatment of arterial occlusive diseases, including renal artery stenosis and arterial occlusions in the leg. For the specific technique of BALLOON DILATION in coronary arteries, ANGIOPLASTY, BALLOON, CORONARY is available.
A biocompatible polymer used as a surgical suture material.
Narrowing or stricture of any part of the CAROTID ARTERIES, most often due to atherosclerotic plaque formation. Ulcerations may form in atherosclerotic plaques and induce THROMBUS formation. Platelet or cholesterol emboli may arise from stenotic carotid lesions and induce a TRANSIENT ISCHEMIC ATTACK; CEREBROVASCULAR ACCIDENT; or temporary blindness (AMAUROSIS FUGAX). (From Adams et al., Principles of Neurology, 6th ed, pp 822-3)
A conical fibro-serous sac surrounding the HEART and the roots of the great vessels (AORTA; VENAE CAVAE; PULMONARY ARTERY). Pericardium consists of two sacs: the outer fibrous pericardium and the inner serous pericardium. The latter consists of an outer parietal layer facing the fibrous pericardium, and an inner visceral layer (epicardium) resting next to the heart, and a pericardial cavity between these two layers.
An abnormal balloon- or sac-like dilatation in the wall of the ABDOMINAL AORTA which gives rise to the visceral, the parietal, and the terminal (iliac) branches below the aortic hiatus at the diaphragm.
Polymers of organic acids and alcohols, with ester linkages--usually polyethylene terephthalate; can be cured into hard plastic, films or tapes, or fibers which can be woven into fabrics, meshes or velours.

Bacteriophage inactivation at the air-water-solid interface in dynamic batch systems. (1/882)

Bacteriophages have been widely used as surrogates for human enteric viruses in many studies on virus transport and fate. In this investigation, the fates of three bacteriophages, MS2, R17, and phiX174, were studied in a series of dynamic batch experiments. Both MS2 and R17 readily underwent inactivation in batch experiments where solutions of each phage were percolated through tubes packed with varying ratios of glass and Teflon beads. MS2 and R17 inactivation was the result of exposure to destructive forces at the dynamic air-water-solid interface. phiX174, however, did not undergo inactivation in similar studies, suggesting that this phage does not accumulate at air-water interfaces or is not affected by interfacial forces in the same manner. Other batch experiments showed that MS2 and R17 were increasingly inactivated during mixing in polypropylene tubes as the ionic strength of the solution was raised (phiX174 was not affected). By the addition of Tween 80 to suspensions of MS2 and R17, phage inactivation was prevented. Our data suggest that viral inactivation in simple dynamic batch experiments is dependent upon (i) the presence of a dynamic air-water-solid interface (where the solid is a hydrophobic surface), (ii) the ionic strength of the solution, (iii) the concentration of surface active compounds in the solution, and (iv) the type of virus used.  (+info)

Association of plasma fibrinogen concentration with vascular access failure in hemodialysis patients. (2/882)

BACKGROUND: Elevated plasma fibrinogen is an important risk factor for coronary artery disease in the general population and patients with chronic renal failure. High plasma fibrinogen may trigger thrombus formation in arteriovenous fistulas. We performed a prospective, cohort study to evaluate the association of plasma fibrinogen concentration with vascular access failure in patients undergoing long-term haemodialysis. METHODS: Between September 1989 and October 1995, 144 patients underwent a vascular access operation. In March 1997, 102 patients (56 M, 46 F) who had been followed up for more than 18 months (median; 37 months, range; 18-102 months) were included in the study. The median age of the patients was 52 years (range; 19-78 years). In 35 patients, renal disease was secondary to diabetes mellitus. The type of vascular access was a polytetrafluoroethylene (PTFE) graft in 17 patients. Seventy-seven patients received recombinant human erythropoietin (r-HuEPO) therapy during the follow-up period. Plasma fibrinogen, albumin, total cholesterol, hematocrit, platelets and creatinine were measured at the time of operation. Vascular access failure was defined as the occurrence of complications requiring transluminal angioplasty, thrombolytic therapy or surgical repair. RESULTS: Thirty-eight patients had at least one vascular access failure and the incidence was 0.3 (range; 0-2.4) episodes per patient-year. The survival rate of vascular access was 78% (native fistula; 80%, PTFE graft; 71%) after 12 months and 70% (native fistula; 73%, PTFE graft; 51%) after 24 months. Older age, a PTFE graft, r-HuEPO therapy, higher hematocrit, lower albumin and higher fibrinogen levels were significantly associated with vascular access failure, whereas gender, diabetes mellitus, total cholesterol and platelet count were not. Plasma fibrinogen was inversely correlated with albumin (r=-0.38, P=0.001). The cumulative vascular access survival was significantly lower in patients with high plasma fibrinogen levels (> or = 460 mg/dl) compared with patients with low levels (< 460 mg/dl) (P=0.007). Independent risk factors for vascular access failure analysed by Cox's proportional hazards model were older age (RR; 1.36 by 10-year increment), higher fibrinogen level (RR; 1.20 by 100 mg/dl increment), PTFE graft (RR; 2.28) and r-HuEPO therapy (RR; 3.79). CONCLUSION: High plasma fibrinogen level is an independent risk factor for vascular access failure in haemodialysis patients.  (+info)

Isolated femoropopliteal bypass graft for limb salvage after failed tibial reconstruction: a viable alternative to amputation. (3/882)

PURPOSE: Femoropopliteal bypass grafting procedures performed to isolated popliteal arteries after failure of a previous tibial reconstruction were studied. The results were compared with those of a study of primary isolated femoropopliteal bypass grafts (IFPBs). METHODS: IFPBs were only constructed if the uninvolved or patent popliteal segment measured at least 7 cm in length and had at least one major collateral supplying the calf. When IFPB was performed for ischemic lesions, these lesions were usually limited to the digits or small portions of the foot. Forty-seven polytetrafluoroethylene grafts and three autogenous reversed saphenous vein grafts were used. RESULTS: Ankle brachial pressure index (ABI) increased after bypass grafting by a mean of 0.46. Three-year primary life table patency and limb-salvage rates for primary IFPBs were 73% and 86%, respectively. All eight IFPBs performed after failed tibial bypass grafts remained patent for 2 to 44 months, with patients having viable, healed feet. CONCLUSION: In the presence of a suitable popliteal artery and limited tissue necrosis, IFPB can have acceptable patency and limb-salvage rates, even when a polytetrafluoroethylene graft is used. Secondary IFPB can be used to achieve limb salvage after failed tibial bypass grafting.  (+info)

Right atrial bypass grafting for central venous obstruction associated with dialysis access: another treatment option. (4/882)

PURPOSE: Central venous obstruction is a common problem in patients with chronic renal failure who undergo maintenance hemodialysis. We studied the use of right atrial bypass grafting in nine cases of central venous obstruction associated with upper extremity venous hypertension. To better understand the options for managing this condition, we discuss the roles of surgery and percutaneous transluminal angioplasty with stent placement. METHODS: All patients had previously undergone placement of bilateral temporary subclavian vein dialysis catheters. Severe arm swelling, graft thrombosis, or graft malfunction developed because of central venous stenosis or obstruction in the absence of alternative access sites. A large-diameter (10 to 16 mm) externally reinforced polytetrafluoroethylene (GoreTex) graft was used to bypass the obstructed vein and was anastomosed to the right atrial appendage. This technique was used to bypass six lesions in the subclavian vein, two lesions at the innominate vein/superior vena caval junction, and one lesion in the distal axillary vein. RESULTS: All patients except one had significant resolution of symptoms without operative mortality. Bypass grafts remained patent, allowing the arteriovenous grafts to provide functional access for 1.5 to 52 months (mean, 15.4 months) after surgery. CONCLUSION: Because no mortality directly resulted from the procedure and the morbidity rate was acceptable, this bypass grafting technique was adequate in maintaining the dialysis access needed by these patients. Because of the magnitude of the procedure, we recommend it only for the occasional patient in whom all other access sites are exhausted and in whom percutaneous dilation and/or stenting has failed.  (+info)

Infrarenal endoluminal bifurcated stent graft infected with Listeria monocytogenes. (5/882)

Prosthetic graft infection as a result of Listeria monocytogenes is an extremely rare event that recently occurred in a 77-year-old man who underwent endoluminal stent grafting for infrarenal abdominal aortic aneurysm. The infected aortic endoluminal prosthesis was removed by means of en bloc resection of the aneurysm and contained endograft with in situ aortoiliac reconstruction. At the 10-month follow-up examination, the patient was well and had no signs of infection.  (+info)

Prospective randomised trial of distal arteriovenous fistula as an adjunct to femoro-infrapopliteal PTFE bypass. (6/882)

OBJECTIVES: To compare graft patency and limb salvage rate following femoro-infrapopliteal bypass using ePTFE grafts with and without the addition of adjuvant arterio-venous fistula. DESIGN: A prospectively randomised controlled trial. MATERIALS: Patients referred to two teaching hospital vascular surgery units in the U.K. for the treatment of critical limb ischaemia. METHODS: Eighty-seven patients (M:F; 2.3:1) undergoing 89 femoro-intrapopliteal bypass operations with ePTFE grafts for critical limb ischaemia were randomly allocated to have AVF included in the operative procedure (n = 48) or to a control group without AVF (n = 41). An interposition vein-cuff was incorporated at the distal anastomosis in all patients. RESULTS: The cumulative rates of primary patency and limb salvage at 1-year after operation for patients with AVF were 55.2% and 54.1% compared to 53.4% and 43.2%, respectively, for the control group. The differences between the AVF and control groups did not reach statistical significance, in terms of either graft patency or limb salvage, at any stage after operation (Log-Rank test). CONCLUSIONS: AVF confers no additional significant clinical advantage over interposition vein cuff in patients having femoro-infrapopliteal bypass with ePTFE grants for critical limb ischaemia.  (+info)

Bypass graft of an occluded inferior vena cava: report of a case with patency at five years. (7/882)

Venous reconstructive surgery for chronic occlusive disease has evolved slower than its arterial counterpart. Factors intrinsic to the venous system that have been implicated in discouraging experimental and clinical results include enhanced graft thrombogenicity, low velocity of blood flow, and wall collapsibility. 1,2 We present a case of a 24-year-old man with symptomatic occlusion of the inferior vena cava, treated with a prosthetic bypass graft to the supra diaphragmatic cava. The graft was patent 5 years later, and the patient remained asymptomatic.  (+info)

Posterior approach to the deep femoral artery. (8/882)

Unusual surgical approaches to the deep femoral artery are valuable when the standard anterior approach is difficult because of scarring or infection. A posterior approach to the deep femoral artery in patients, in whom all other approaches were unsuitable, is described.  (+info)

TY - JOUR. T1 - Nonporous silicone polymer coating of expanded polytetrafluoroethylene grafts reduces graft neointimal hyperplasia in dog and baboon models. AU - Lumsden, A. B.. AU - Chen, C.. AU - Coyle, K. A.. AU - Ofenloch, J. C.. AU - Wang, J. H.. AU - Yasuda, H. K.. AU - Hanson, S. R.. PY - 1996. Y1 - 1996. N2 - Purpose: Neointimal hyperplasia frequently develops after placement of prosthetic vascular grafts and is a major cause of graft failure. This study was an attempt to prevent vascular lesion formation by coating the graft luminal surface with a thin layer of nonporous silicone polymer, and subsequently with an ultrathin layer of vapor phase (plasma gas)-deposited fluoropolymer, thereby providing a smooth and chemically uniform surface that was postulated to limit pannus tissue ingrowth across the graft anastomoses. Methods: Bilateral femoral arteriovenous (AV) conduits were constructed in four dogs using expanded polytetrafluoroethylene graft materials (ePTFE; 6- mm inside diameter, ...
TY - JOUR. T1 - Expanded polytetrafluoroethylene graft fistula for chronic hemodialysis. AU - Tellis, V. A.. AU - Kohlberg, W. I.. AU - Bhat, D. J.. AU - Driscoll, B.. AU - Veith, F. J.. PY - 1979. Y1 - 1979. N2 - In a retrospective study of 66 polytetrafluoroethylene arteriovenous fistulae (PTFE) and 71 bovine carotid heterograft arteriovenous fistulae (BCH) for dialysis access, PTFE had a higher patency rate than BCH at 12 months (62.4 versus 32.5%). PTFE was easier to work with and easier to handle in the face of infection. The lateral upper arm approach to placement of the PTFE graft is desirable in patients who have had multiple previous access procedures because this area is usually free from scarring, is distant from neurovascular structures, and provides a greater length of graft for needle punctures.. AB - In a retrospective study of 66 polytetrafluoroethylene arteriovenous fistulae (PTFE) and 71 bovine carotid heterograft arteriovenous fistulae (BCH) for dialysis access, PTFE had a ...
As per Market.Biz analysis, by the end of 2017, Global sales revenue of Polytetrafluoroethylene (PTFE) Market is expected to touch nearly 3.4 Billion USD, as well as global Polytetrafluoroethylene (PTFE) market, is expected to cross US$ XXXX Mn by the end of the year 2022. The global Polytetrafluoroethylene (PTFE) market is expected to exhibit a CAGR of XX.XX % during the assessment period from 2016-2022.. Global Polytetrafluoroethylene (PTFE) Market 2017 Research refine essential aspects of the Polytetrafluoroethylene (PTFE) market and presents them in the form of a united and all-inclusive document. Polytetrafluoroethylene (PTFE) market report focuses on the top leading manufacturers of Polytetrafluoroethylene (PTFE) industry. Firstly, the Polytetrafluoroethylene (PTFE) market report gives you the basic overview of the Polytetrafluoroethylene (PTFE) industry 2017. Secondly, this Polytetrafluoroethylene (PTFE) market study gives the information about the types of products, price, ...
TY - JOUR. T1 - Acutely sodded expanded polytetrafluoroethylene grafts produce only prostacyclin. T2 - A qualitative difference from saphenous veins. AU - Desai, S. B.. AU - Cable, D. G.. AU - Phillips, M. R.. AU - Schaff, H. V.. PY - 2000. Y1 - 2000. N2 - Select subsets of patients require prosthetic graft material for revascularization. Although arterial prosthetic grafts of large caliber perform acceptably, grafts of ,6 mm exhibit a high attrition rate. Microvessel endothelial sodding, a method resulting in the lining of prosthetic grafts with autologous endothelium, improves graft patency however, aggressive antiplatelet therapy is still required, because terminating an antiplatelet regimen accelerates graft attrition. The present investigation was designed to address the acute production of vasoactive substances in microvessel endothelial cell sodded expanded polytetrafluoroethylene (ePTFE) grafts in an attempt to delineate a possible mechanism behind the continued requirement for ...
TY - JOUR. T1 - Comparative evaluation of stretch and non-stretch polytetrafluorethylene (PTFE) prosthetic grafts for femoro-popliteal bypass. AU - Lu, Chorng Horng. AU - Chang, Jason. AU - Lai, Shiau Ting. AU - Shih, Chun Che. PY - 2002/8/7. Y1 - 2002/8/7. N2 - Background. The results of femoropopliteal bypass surgery using various prosthetic materials are frustrated until the expanded polytetrafluorethylene (PTFE) was introduced as a vascular prosthesis in 1973. Since then, the techniques of femoropopliteal bypass improved rapidly, but the long-term patency rate, compaired with autogenous saphenous vein graft, remained unsatisfied. The stretch PTFE graft developed in 1991 became available for clinical usage. The objective of this study is to compare the long-term results between stretch and non-stretch PTFE prosthetic conduits in patients who underwent femoropopliteal vascular reconstruction. Methods. From Jun. 1993 to Jun. 1998, 68 femoropopliteal bypass operations were performed in 59 ...
Seaman, D.S.; Newell, K.A.; Piper, J.B.; Bruce, D.S.; Woodle, E.S.; Cronin, D.C.; Alonso, E.M.; Whitington, P.F.; Thistlethwaite, J.R.; Millis, J.M., 1996: Use of polytetrafluoroethylene patch for temporary wound closure after pediatric liver transplantation
A vascular graft comprised of a tubular polytetrafluoroethylene (ePTFE) sheet is provided. The ePTFE sheet has a substantially uniform coating of bioresorbable gel material, for example gelatin, on a surface thereof. The coating minimises bleeding through suture holes in the ePTFE sheet and provides an increase in longitudinal extensibility.
TY - JOUR. T1 - Acute disruption of polytetrafluoroethylene grafts adjacent to axillary anastomoses. T2 - A complication of axillofemoral grafting. AU - Taylor, Lloyd M.. AU - Park, Thomas C.. AU - Edwards, James. AU - Yeager, Richard A.. AU - McConnell, Donald. AU - Moneta, Gregory (Greg). AU - Porter, John M.. PY - 1994. Y1 - 1994. N2 - Purpose: Acute disruption at or adjacent to axillary anastomoses of axillofemoral grafts has been sporadically reported. We have recently reported the patency and limb salvage results of a large number of axillofemoral grafts. In this report we describe a series of axillary artery-graft disruptions that occurred in these patients. Methods: Beginning in 1983, axillofemoral bypass was performed by the authors using standardized operative technique and a single prosthetic graft material (8 mm externally supported polytetrafluoroethylene). Axillary anastomoses were placed on the first portion of the artery and were performed with the arm abducted and with the graft ...
D4895 - 16 Standard Specification for Polytetrafluoroethylene (PTFE) Resin Produced From Dispersion , coagulated dispersion polytetrafluoroethylene, fluoropolymers, polytetrafluoroethylene, PTFE,,
Quality PTFE Coated Fiberglass Cloth - White PTFE Coated Fiberglass Fabric Expanded Polytetrafluoroethylene Tape for sale of QINGDAO BOCHENG INDUSTRIAL CO.,LTD from China.
The present invention provides improved compositions of expanded polytetrafluoroethylene (PTFE) and similar polymers and methods for forming and using such compositions. In its preferred embodiment, the present invention employs a mixture of PTFE and expandable thermoplastic microspheres. Through application of an energy source to the mixture, a coherent three dimensional expansion of PTFE can be achieved. The expanded mixture has many of the same beneficial properties of mechanically expanded PTFE and numerous properties previously unavailable with expanded PTFE products.
A bio-active material such as heparin, urokinase or streptokinase is bonded via a hydrophilic spacer to a functionality on the surface of a hydrophobic, bio-compatible polymeric substrate to provide a coating of the bio-active material on the surface. The substrate surface is preferably the surface of an implantable medical device such as a vascular graft. An amine and/or hydroxyl functionality on the substrate surface is reacted with an isocyanate group at an end of the hydrophilic spacer to bond the spacer to the substrate, and the bio-active material is reacted with an isocyanate group at another end of the spacer to bond the bio-active material to the spacer. Polymeric substrates include expanded polytetrafluoroethylene and polyethylene terephthalate, and the hydroxyl and/or amine functionality may be provided on the substrate surface by plasma glow discharge. A preferred spacer is an isocyanate end-blocked poly(ethylene oxide). Reaction of the functionality of the substrate with the isocyanate
An assembly including a fluorine rubber molding, and a polytetrafluoroethylene porous body which has pores and is held on the fluorine rubber molding, wherein the polytetrafluoroethylene porous body i
Background: Patency and limb salvage after synthetic bypass to the arteries below-knee are inferior to that which can be achieved with autologous vein. Use of a vein collar at the distal anastomosis has been suggested to improve patency and limb salvage, a problem that is analysed in this randomised clinical study. Methods: Patients with critical limb ischaennia undergoing polytetrafluoroethylene (PTFE) bypass to below-knee arteries were randomly either assigned a vein collar or not in two groups bypass to the popliteal artery below-knee (femoro-popliteal below-knee (FemPopBK)) and more distal bypass (femoro-distal bypass (FemDist)). Follow-up was scheduled until amputation, death or at most 5 years, whichever event occurred first. Results: In the FemPopBK and in the FemDist groups, 115/202 and 72/150 were randomised to have a vein collar, respectively. Information was available for 345 of 352 randomised patients (98%). At 3 years, primary patency was 26% (95% confidence interval (CI) 18-38) ...
A method of forming porous articles with a varying pore distribution by extrusion from a billet with a varying lubricant distribution. A single-polymer polytetrafluoroethylene is extruded and then stretched and sintered to provide a differential porous PTFE structure composed of fibers and nodes connected to one another by these fibers. The microfibrous structure has a portion within the cross-section that possesses a different pore size, accompanied by a different node and fiber geometry, than adjacent areas within that cross section. In a vascular graft, the pores taper inwardly, providing a fluid-tight lumen wall structure that prevents leakage, yet promotes cellular ingrowth and natural tissue regeneration. A node structure of radially-oriented plates provides flexibility, suture strength, and enhanced protection against collapse.
TY - JOUR. T1 - Outcomes of a Polytetrafluoroethylene Hybrid Vascular Graft with Preloaded Nitinol Stent at the Venous Outflow for Dialysis Vascular Access. AU - Habibollahi, Peiman. AU - Mantell, Mark P.. AU - Rosenberry, Trish. AU - Leeser, David B.. AU - Clark, Timothy W.I.. PY - 2019/2. Y1 - 2019/2. N2 - Background: To evaluate outcomes and patency of arteriovenous grafts (AVGs) created using Gore hybrid vascular grafts in hemodialysis patients with limited venous outflow or challenging anatomy. Materials and methods: A retrospective review was performed in two academic centers of all patients between July 2013 and December 2016 who underwent surgical AVG creation using a Gore hybrid vascular graft in a brachial artery to axillary configuration. Patient characteristics and comorbidities as well as graft patency, function, and subsequent need for percutaneous interventions were recorded. Results: Forty-six patients including 30 females (65.2%) and 16 males (34.8%) with a mean age of 63 ± 13 ...
The flexible structure of polymers has enabled them to be useful in a wide variety of medical applications due to the possibility to tailor their properties to suit desired applications. For a long ti
Polymer electrolyte fuel cells require gas diffusion layers that can efficiently distribute the feeding gases from the channel structure to the catalyst la
RESULTS: Two of 14 heparinized PTFE grafts and nine of 14 grafts in the control PTFE-group were occluded at explantation (P=0.006). Six-month patency rates for heparinized PTFE grafts and for standard PTFE grafts were 86% and 36%, respectively. Mean graft anastomotic IH thickness in open grafts were 0.074 mm for heparinized PTFE grafts and 0.259 mm for PTFE-grafts (P=0.006 ...
Background: Bypass graft thrombosis remains a significant mode of failure in prosthetic graft revascularization. The purpose of this investigation was to evaluate the long-term thromboresistant effect of heparin-bonded expanded polytetrafluoroethylene (ePTFE) graft using Carmeda BioActive Surface technology in a canine model. Methods: Bilateral femorofemoral artery bypass grafts with ePTFE grafts were performed in 25 adult grayhound dogs. In each animal, a heparin-bonded ePTFE graft (Propaten, WL Gore) was placed on one side, whereas a control nonheparin graft was placed on the contralateral side. The graft patency was assessed at 1, 6, 12, 18, and 24 months (n = 5 per group) following the bypass. Heparin bioactivity of the graft material was analyzed. The effect of intimal hyperplasia was also assessed. Results: All bypass grafts were patent at 1 month. Significantly greater patency rates were noted in the Propaten group compared to the control group at 12, 18, and 24 months, which were 84%, ...
3M 5480 is a 1 Part Pressure Sensitive, Skived PTFE (polytetrafluoroethylene), Silicone, Tape used to Bond, Mask, and Sealing Steel. View datasheet for 3M 5480.
This specification covers a polytetrafluoroethylene (PTFE) resin filled with carbon fiber in the form of extruded or molded rods or tubes which are sintered after molding or, in the case of extrusions, sintered during the extrusion process.
This specification covers a polytetrafluoroethylene (PTFE) filled resin filled with 40% bronze powder in the form of extruded or molded rods or tubes which are sintered after molding or, in the case of extrusions, sintered during the extrusion process. ...
BACKGROUND: The majority of mid- and long-term synthetic vascular graft failures are due to anastomotic neointimal fibrous hyperplasia. The major cause of this phenomenon is the absence of an endothelial lining within prosthetic grafts. We investigated the PDGF-BB and bFGF release by umbilical vein endothelial cell cultured on precoated standard porosity or high porosity expanded polytetrafluoroethylene (ePTFE) vascular grafts. METHODS: Endothelial cell harvested from umbilical veins were cultured into standard (30 microns internodal distance) or high porosity (60 microns internodal distance) cPTFE disks. ePTFE disks uncoated or precoated with collagen type I, fibronectin and Matrigel were used and endothelial cell cultured into plastic wells coated as ePTFE disks or uncoated plastic wells served as controls. Scanning electron microscopy study assessed endothelial cell coverage. The presence of PDGF-BB and bFGF in serum-free conditioned media from endothelial cells cultured into ePTFE grafts and ...
This SAE Aerospace Standard (AS) covers scarf-cut polytetrafluoroethylene (PTFE) retainers (backup rings) for use in glands in accordance with AS4716. They are for use in hydraulic and pneumatic system components as anti-extrusion devices in conjunction with O-rings, packings and other elastomeric seals for static and dynamic applications.. Because of the construction of groove dimensions, backup rings specific to rod applications are designated R - Rod (Female), backup rings specific to piston applications are designated P - Piston (Male). Piston and rod types of virgin pigmented PTFE are also identified by color code which also distinguishes parts to this standard from those made from virgin PTFE to other standards.. ...
A 260°C (500°F) maximum service temperature, 100% Polytetrafluoroethylene coated felt filter bag that incorporates a conductive staple to offer static dissipation in pulse jet style dust collectors with chemically aggressive operating conditions.
United States Patent 3,334,157 POLYETHYLENE BLENDS CONTAINING TRACE AMOUNTS OF POLYTETRAFLUOROETHYLENE Hans R. Larsen, Montreal, Quebec, Canada, assignor to Union Carbide Canada Limited, Toronto, Ontario, Canada, a corporation of Canada No Drawing. Filed Dec. 3, 1963, Ser. No. 327,835 9 Claims. (Cl. 260-897) ABSTRACT OF THE DISCLOSURE Polyethylene is modified to improve its optical properties by blending finely-divided poly(tetrafiuoroethylene) as an aqueous dispersion into the polyethylene. Polyethylene compositions containing from 0.015 percent to about 1.7 percent by weight of poly(tetrafiuoroethylene) were prepared. This invention relates to modified polyethylene having improved optical properties. More particularly, this invention relates to polyethylene modified by the addition of a minor amount of finely-divided poly (tetrafluoroethylene). The use of polyethylene in the production of films for consumer packaging is well known. Such films are desirably characterized by low haze, high ...
Page contains details about polytetrafluoroethylene:Super P carbon black:Ketjenblack supported polyanthraquinone composite film . It has composition images, properties, Characterization methods, synthesis, applications and reference articles : nano.nature.com
A carbon containing vascular graft formed of expanded polytetrafluoroethylene and activated carbon admixed with at least a portion of the expanded polytetrafluoroethylene. A bioactive substance may be incorporated in the carbon containing vascular graft.
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Significant alveolar ridge deformation is expected after performing a tooth extraction.1,2 Several classifications systems have been developed to aid clinicians in evidence-based management when treating residual alveolar ridge deformities.3-7 With the advent of implant therapy, socket augmentation procedures (SAPs) are commonly indicated to minimize physiologic alveolar bone remodeling following a tooth extraction and to prepare an edentulous ridge for the future implant.. Within the literature, myriad SAP studies have advocated the use of various bone grafting materials (e.g., autografts, allografts, xenografts and alloplasts), cell-occlusive barrier membranes (absorbable and nonresorbable), and biologic agents (enamel matrix derivatives, platelet-derived growth factor, bone morphogenetic protein-2 and others). These biomaterials are meant to serve as space maintainers, to provide epithelial exclusion and wound stabilization, and to promote new bone formation. A clear understanding of the ...
PTFE hose with one or two stainless steel braid, Convoluted PTFE hose with one stainless steel braid. The inner tube of hose type THP1 is in pure polytetrafluorethylene (PTFE), allows use of food products. This mid-range pressure hose is compatible with a large number of fluids : hydraulic oils, high temperatures, chemical products as indicated in the fluid compatibility chart, steam, products ...
PTFE is hydrophobic: neither water nor water-containing substances wet PTFE, as fluorocarbons demonstrate mitigated London dispersion forces due to the high electronegativity of fluorine. PTFE has one of the lowest coefficients of friction of any solid.. PTFE is used as a non-stick coating for pans and other cookware. It is nonreactive, partly because of the strength of carbon-fluorine bonds, and so it is often used in containers and pipework for reactive and corrosive chemicals. Where used as a lubricant, PTFE reduces friction, wear, and energy consumption of machinery. It is commonly used as a graft material in surgical interventions.. It is also frequently employed as coating on catheters; this interferes with the ability of bacteria and other infectious agents to adhere to catheters and cause hospital-acquired infections.. ...
The Advanta VXT vascular graft is a synthetic vascular prosthesis made from expanded Polytetrafluoroethylene (ePTFE). It is comprised of a reinforced two-layer design to offer greater strength to that of Getinges single layer ePTFE grafts. The Advanta VXT vascular graft is available in straight and tapered configurations offering the ability to match or alter vessel flow dynamics. VXT grafts are also offered with and without helical support (commonly referred to as rings) should additional radial support be preferred. Additionally, grafts can be ordered as standard wall thickness or thin wall thickness.. ...
A vascular bypass (or vascular graft) is a surgical procedure performed to redirect blood flow from one area to another by reconnecting blood vessels. Often, this is done to bypass around a diseased artery, from an area of normal blood flow to another relatively normal area. It is commonly performed due to inadequate blood flow (ischemia) caused by atherosclerosis, as a part of organ transplantation, or for vascular access in hemodialysis. In general, someones own vein (autograft) is the preferred graft material (or conduit) for a vascular bypass, but other types of grafts such as polytetrafluoroethylene (Teflon), polyethylene terephthalate (Dacron), or a different persons vein (allograft) are also commonly used. Arteries can also serve as vascular grafts. A surgeon sews the graft to the source and target vessels by hand using surgical suture, creating a surgical anastomosis. Common bypass sites include the heart (coronary artery bypass surgery) to treat coronary artery disease, and the legs, ...
Histologic evaluations were carried out I month and 3 months after surgery. The biomechanical strength of the anastomosis was assessed along the longitudinal axis of the aortic segments using a tensile tester. Local compliance at the anastomotic site was also evaluated in the circumferential direction.\n\nResults. The media was significantly thinner in the PTFE group than in the control group (65.8% +/- 5.1% vs 95.0% +/- 9.3% of normal thickness; P , .05). Relative to the control group, the adventitial layer was significantly thinner in the PTFE group (42.3% +/- 8.2% of control; P , .05) but significantly. thicker in the PGA and the PGA + bFGF groups (117.2% +/- 11.3% and 134.1% +/- 14.2% of control, respectively; P , .05). There were more. vessels this website in the adventitial layer in the PGA Protein Tyrosine Kinase inhibitor + bFGF group than in the control, PTFE, and PGA groups (29.2 +/- 2.1/mm(2) vs 13.8 +/- 0.8, 5.4 +/- 0.7, 17.0 +/- 1.3/mm(2), respectively; P , .01). There were no ...
304804 - 2/2 - A - normally closed - inlet port 1 (P/NC) | 6,00 mm (1/4 inch) | 0,00 bar - 4,00 bar | Brass | Inner thread - NPT3/8 | 24,00 V - 24,00 V | PTFE (Polytetrafluorethylene) | -40,00 °C - 180,00 °C | Valve complete
The PTFE-covered self-expanding Niti-S stent endoprosthesis. The stent is a woven, monofilament structure composed of nitinol, and it is covered on its interior
Did you know that some of the pots and pans in your pantry might be hydrophobic?. Hydrophobicity is a term used in chemistry to describe the physical properties of molecules that repels from water. This type of fear is a good thing if you like having your meals slide easily from the non-stick coating of your cookware.. But, PTFE is not just for cooking anymore. PTFE is used in a wide variety of applications and come in an assortment of formats. Learn more about this chemical creation in the following five simple facts about PTFEs form, fit and function.. What exactly is PTFE?. PTFE or PolyTetraFluoroEthylene is a thermoplastic part of the fluoropolymer plastics family. This heat-resistant, non-stick coating is more commonly known as the trademark Teflon® rather than its chemical name of PTFE. Tell me more about this PTFE thing. PTFEs chemical inertness to a large range of substances allows it to have high insulation and low friction properties in addition to its non-stick qualities and ...
The RAE GORE-TEX® ankle boot is built for all day comfort - whatever the weather. RAE GORE-TEX® guarantees warm comfort and stability with an insulated and waterproof GORE-TEX® lining, side-zipper, removable insole and a chunky commando sole made from TR-rubber This combination of robust grip, durability, and winter p
Womens Challenger Lowomens Gore-Tex from HOKA ONE ONE, Designed for the city and the trails, the Challenger Low GORE-TEX features a Nubuck leather and a GORE-TEX waterproof bootie for a clean look.
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Extruded, stretched, sintered tubular PTFE materials are produced which are suited for use in the medical field as liners and covers for expandable stents. The PTFE materials have an unusually low REC (Radial Expansion Coefficient) and RER (Radial Expansion Ratio).
Purchase your copy of 18/30381685 DC as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards available online in electronic and print formats.
Teflon PTFE Products from Chinese suppliers. ECVV.com provides Teflon PTFE product China Sourcing Agent service and supply chain service to protect the product quality and payment security.
Investigations of market injury to U.S. domestic industry by foreign companies due to product dumping and/or subsidization under Sections 701 or 731 under Title VII of the Tariff Act of 1930 or injury due to substantially increase imports under sections 201 or 202 of the Trade Act of 1974 or section 302 of the NAFTA Implementation Act ...
we r manufacturer of teflon products and teflon belts,http://www.google.com/ ,akshar enterprise teflon belts manufacturer: PTFE seamless Fusing Belt - conveyor beltteflon(PTFE)teflon,Teflon®, Kevlar®: belts, tapes, fabrics, coater; PTFE, Fabrics - PTFE and Teflon® Coated Fiberglass Belts, Tapes,teflon tape, heat resistant tape, conveyor belt, PTFE belt, teflon Conveyor Belts, Power Transmission Beltings, Teflon Belts,kevlar belts,teflon conveyor belt Products, teflon conveyor belt Manufacturers ,teflon fusing belts,ptfe fusing belt,teflon fusing belt,ptfe ,PTFE seamless Fusing Belt - conveyor beltteflon(PTFE)teflon ...
TY - JOUR. T1 - Maximization of the sealing effect of fibrin glue in aortic surgery. AU - Naganuma, Masaaki. AU - Akiyama, Masatoshi. AU - Takaya, Hiroki. AU - Sakuma, Kei. AU - Kumagai, Kiichiro. AU - Kawamoto, Shunsuke. AU - Adachi, Osamu. AU - Saiki, Yoshikatsu. PY - 2020/1/1. Y1 - 2020/1/1. N2 - Objectives: Fibrin glue is used to reinforce anastomosis in aortic surgery. There has not yet been a consensus on how it should be applied optimally. This study aimed to define the optimal condition of applying fibrin glue. Methods: In experiment 1, we determined the optimal condition for spraying fibrin glue using an expanded polytetrafluoroethylene graft within a needle hole. The length and area of the fibrin cap within the hole were measured. In experiment 2, methods for applying fibrinogen were assessed by comparing brushing and spraying. In experiment 3, swine aorta segments sutured with a Dacron graft were divided into the following three groups: nothing was applied; fibrinogen was sprayed and ...
Medipac Catalogue Download. Suture name: Profimed. Undyed, monofilament non absorbable PTFE suture.. Brand equivalent: GoreTex. Pack of 24.. Time to resorb to 50%: N/A. Time to lose 50% tensile strength: N/A. Other features: Easily removed and to tie. Resistant to infection, minimal inflammation.. Indications: Microsurgery. Soft tissue surgery.. (Prolene, Dacron ,GoreTex, Dexon, Vicryl and Vicryl Rapide are registered trademarks and unconnected with the Biomaterials store) ...
We provide infromation such as Analysis, Patent, Process, Company, Data Sheet, Suppliers, Application, Risk, Report about Polytetrafluoroethylene
From May 1977 to February 1981, 36 modified Blalock-Taussig shunts were performed in 34 patients for a variety of cyanotic congenital cardiac lesions. Microporous expanded PTFE was utilised as a conduit between the subclavian artery and the ipsilater
A porous composite membrane is provided comprising a film of porous, expanded polytetrafluoroethylene whose surfaces, both exterior and within its pores, are coated with a metal salt of a perfluoro-cation exchange polymer. Also provided is the method of avoiding false-positive detection of the presence of organic nerve gas agents by a sensor adapted to detect such presence by employing in the sensor a porous composite membrane comprising a film of porous, expanded polytetrafluoroethylene whose surfaces, both exterior and within its pores, are coated with a metal salt of a perfluoro-cation exchange polymer, the composite acting as a scavenger of unwanted gas components which cause the false-positive signals.
BACKGROUND: We analyzed our experience in sternal resections (SRs) for primary or secondary neoplasm focusing on technical aspects of reconstruction, post-operative outcomes and long term survival. METHODS: From January 2005 to December 2015, 36 patients (24 males, 67%) underwent surgical excision of primary (chondrosarcoma n=18 patients, 50%; osteosarcoma n=2, 6%; Ewing sarcoma n=1, 3%; other n=2, 6%) or secondary (breast cancer n=7, 19%; kidney carcinoma n=2, 6%) sternal tumour. We performed n=30 partial sternectomy and n=6 total sternectomy with en-bloc resection of the sternocostal cartilages in all patient and extended resection in 7 patients. Stability was obtained with prosthetic material, rigid and non-rigid and a muscular flap: rigid material [Strasbourg Thoracic Osteosynthesis System (STRATOS), MedXpert GmbH] and muscle flap n=11 (30.6%); polytetrafluoroethylene patch and muscle flap n=6 (16.7%); muscle flap alone n=19 (52.8%). RESULTS: The 30-day mortality rate was 0, overall ...
The use of guided bone regeneration to fill large bone voids in the mandible created through en bloc resection and chronic granulation in three primates was examined. In each of three animals, en bloc resections of implants and surrounding bone were done bilaterally (10 × 8 mm and 16 × 8 mm). Tissues were allowed to heal in a chronic state (for 6 months). A reinforced expanded polytetrafluorethylene (e-PTFE) membrane was then surgically placed over each defect site to be followed for 1 year postsurgically. Two of the six membranes became infected during the first month and were removed. The remaining four membranes were removed en bloc after 1 year. Bone regeneration (greater than 90% of the defect) was observed clinically, and subtraction radiology demonstrated bone gain of between 544 and 733 mg. Histomorphometry after fluorescent labeling demonstrated a mean growth rate of 2.77 µm/wk for all sites measured, and a decrease in the number of osteons from the new bone at the crest to the ...
An apparatus is provided that includes a graft for coupling two vascular conduits within a patient. The graft includes: 1) an anchor system that forms an arc at one end of the conduits; and 2) a body element coupled to the anchor system. The anchor system comprises a biodegradable stent. In particular embodiments, portions of the graft are either self-expandable or balloon-expandable. In still other embodiments, anchor system includes NITINOL and the anchor system is substantially self-sealing at one end of the conduits. In one embodiment, the body element comprises polytetrafluoroethylene (PTFE) or expanded polytetrafluoroethylene (EPTFE). In yet other embodiments, the body element includes either a gelatinous or an elastomeric coating disposed on its surface.
We examined short- and long-term outcomes of tibial and peroneal venous and heparin-bonded expanded polytetrafluoroethylene bypasses in patients with critical limb ischemia who were unsuitable for endovascular revascularization. ...
After myocardial infarction, the implantation of stem cell seeded scaffolds on the ischemic zone represents a promising strategy for restoration of heart function. However, mechanical integrity and functionality of tissue engineered constructs need to be determined prior to implantation. Therefore, in this study a novel pulsatile bioreactor mimicking the myocardial contraction was developed to analyze the behavior of mesenchymal stem cells derived from umbilical cord tissue (UCMSC) colonized on titanium-coated polytetrafluorethylene scaffolds to friction stress. The design of the bioreactor enables a simple handling and defined mechanical forces on three seeded scaffolds at physiological conditions. The compact system made of acrylic glass, Teflon®, silicone, and stainless steel allows the comparison of different media, cells and scaffolds. The bioreactor can be gas sterilized and actuated in a standard incubator. Macroscopic observations and pressure-measurements showed a uniformly sinusoidal
August 10, 2016-Two-year findings from the RESCUE study were published online ahead of print by Abigail Falk, MD, in the Journal of Vascular and Interventional Radiology (JVIR). RESCUE assessed the safety and efficacy of the Fluency Plus (Bard Peripheral Vascular) expanded polytetrafluoroethylene endovascular stent graft versus balloon angioplasty for the treatment of in-stent restenosis in the venous outflow of hemodialysis access grafts and fistulae.. In the RESCUE trial, 275 patients at 23 sites in the United States were randomized to stent graft placement or percutaneous transluminal angioplasty (PTA). Primary study endpoints were access circuit primary patency (ACPP) at 6 months and safety through 30 days; secondary endpoints were evaluated through 24 months.. In JVIR, the RESCUE investigators reported that ACPP at 6 months was significantly higher in the stent graft group versus the PTA group (18.6% vs 4.5%; P , .001), and freedom from safety events (30 days) was comparable (stent graft, ...
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DESCRIPTION (provided by applicant): Over 60,000 prosthetic grafts, which are comprised of either polyethylene terephthalate (polyester) or expanded polytetrafluoroethylene (ePTFE), are implanted in the United States each year. Medium (6-8mm) internal dia meter (I.D.) prosthetic arterial grafts continue to have unacceptably high failure rates when used in the clinical setting. Currently, there is no small- diameter prosthetic arterial graft clinically accepted for use in the peripheral circulation (below kn ee popliteal) and coronary vessels, which affects over 500,000 patients each year. The two major complications associated with these grafts are acute thromboses and incomplete, unregulated cellular healing. This failure is attributed to the lack of endothe lial cells at the biomaterial/blood interface, a lining that normal blood vessels possess. The goal of this two-year Phase I project is to synthesize and characterize in vitro a novel nanofibrous vascular graft material using our ...
Barriers used for GBR procedures are referred to by a variety of names, including: membranes; barrier membranes; biologic barriers; occlusive membranes; bioresorbable (which need to be degraded by the body), bioabsorbable (which dissolve in body fluids without polymer chain cleavage), and biodegradable (which break down due to macromolecular degradation) barriers; and resorbable and nonresorbable barriers.18 Nonresorbable membranes can be divided into two categories: expanded (e-PTFE) and dense (d-PTFE) polytetrafluoroethylene. The material is the same for both barriers, but the e-PTFE has been stretched. The pore size for e-PTFE (trade name Gore-Tex) is 5 to 30 microns (µm), and d-PTFE (Cytoplast) pore size is 0.2 µm.1 With regard to timing of removal of nonresorbable barriers, it has been suggested that they be removed in 4 to 6 weeks for GTR procedures and 6 to 9 months for GBR.18. When the efficacy of d-PFTE was compared to e-PTFE to achieve GTR in osseous defects, the studies demonstrated ...
Authors: Alobaid, Nasser , Salacinski, Henryk J. , Sales, Kevin M. , Hamilton, George , Seifalian, Alexander M. Article Type: Research Article Abstract: Small-diameter prosthetic cardiovascular bypass grafts have high occlusion rates. Thrombogenicity caused by the lack of endothelial cells (ECs) on the luminal surface of the grafts is one of the main reasons for its occlusion. One strategy to improve the clinical performance of cardiovascular prosthetic grafts has been to seed its luminal surface with a monolayer of the patients own ECs. In this strategy a two stage seeding procedure is utilized whereby cells obtained from a vein are amplified in cell culture, then seeded onto a fibrin-arginine-glycine-aspartate (RGD) tripeptide-enriched expanded polytetrafluoroethylene (ePTFE) graft in a rotating bioreactor for one week, after …which it is surgically implanted. This achieves patency rates approaching those of vein grafts. The disadvantage of two stage seeding is that it requires culture ...
Chemical Processing, Automotive, Aviation & Aerospace, Electrical & Electronics, Other Applications,. Know More @ https://decisionmarketreports.com/market-reports/1107498/global-and-regional-polytetrafluoroethylene-(ptfe)-films-industry-production,-sales-and-consumption-status-and-prospects-professional-market. The prime objective of this report is to help the user understand the market in terms of its definition, segmentation, market potential, influential trends, and the challenges that the market is facing. Deep researches and analysis were done during the preparation of the report. The readers will find this report very helpful in understanding the market in depth. The data and the information regarding the market are taken from reliable sources such as websites, annual reports of the companies, journals, and others and were checked and validated by the industry experts. The facts and data are represented in the report using diagrams, graphs, pie charts, and other pictorial representations. ...
• Autogenous saphenous vein was used preferentially for 92 below-knee bypass procedures (44 femoral-distal popliteal and 48 femoral-distal tibial or peroneal) p
Video articles in JoVE about cell adhesion include Using Cell-substrate Impedance and Live Cell Imaging to Measure Real-time Changes in Cellular Adhesion and De-adhesion Induced by Matrix Modification, Analyzing Cell Surface Adhesion Remodeling in Response to Mechanical Tension Using Magnetic Beads, Adhesion Frequency Assay for In Situ Kinetics Analysis of Cross-Junctional Molecular Interactions at the Cell-Cell Interface, Bead Aggregation Assays for the Characterization of Putative Cell Adhesion Molecules, Simultaneously Capturing Real-time Images in Two Emission Channels Using a Dual Camera Emission Splitting System: Applications to Cell Adhesion, Wet Chemistry and Peptide Immobilization on Polytetrafluoroethylene for Improved Cell-adhesion, Characterization of Cell Membrane Extensions and Studying Their Roles in Cancer Cell Adhesion Dynamics, Nanotopology of Cell Adhesion upon Variable-Angle Total Internal Reflection Fluorescence Microscopy (VA-TIRFM), Dissection of Organizer and
NASA started evaluating compatibility of polymers with oxygen more than 30 years ago. New test methods and a systematic approach to evaluate oxygen system hazards were developed. The new methods were used extensively to acquire data on a large number of polymers. NASAs batch-lot control strategy for qualifying spacecraft materials allowed acquiring extensive data, principally on the best candidates for aerospace usage. A review of pneumatic impact sensitivity data on selected materials for aerospace applications is provided; it includes data on polytetrafluoroethylene, Viton®5 A, polychlorotrifluoroethylene, Vespel®6 SP-21 and Vespel SP-1. Since the number of samples tested at each condition was large, the data are presented in terms of reaction frequencies. This is considered to be statistically defensible when compared with the uncertainties related to the pressure threshold data commonly reported. For most materials, the data presented were obtained from a large number of batches, thus ...
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There is mit kombination in l-arginin viagra strong evidence that cer- tain combinations of patterns, that have cardiac dilation and dysfunction or congenital defects is expanded polytetrafluoroethylene (eptfe). Note that crackles are heard. If the parents will visit, or withdrawing from others. Therefore, patients who survived to term infants older than 6 fr) 4. Inject a large v wave, which corresponds to a neonatal biventricular repair may require initial therapy for this method is not indicated in these settings is the best of our ability to hold and look for specific causes are the type of dehydration are present, such as wearing protective equipment, can create pressure areas. Studies investigating the association was present in infancy the chests shape is achieved. Corticosteroids may be performed 544 days later. The nor- mal fetus using diffusion tensor imaging compared to initial monotherapy in patients with constrictive pericarditis up to 15% of the pulmonary the late development of ...
Shape memory alloy and elastically self-expanding endoluminal support structures which are at least partially encapsulated in a substantially monolithic expanded polytetrafluoroethylene (
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3M™ Dyneon™ PTFE TF 1620 is a semi-free flowing powder grade polytetrafluoroethylene (PTFE) thats ideal for molding of billets for skived films of greater than 200 µm, shaped parts sheet stock and thinner walled articles. TF 1620 offers broad chemical resistance and an excellent operating temperature range from -328°F (-200°C) to 500°F (260°C).
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1) In all test datasets with varying aortic arch pathologies, diameters were determined with the new application with minor differences (1.5 ± 1.2 mm) compared to the standard measurements. Individual patches were calculated. In phantoms (Goretex) of pathologic aortas, the patches were inserted successfully (Figure 1: Goretex phantom with partial (A) and fully (B) inserted patch). MRI thereafter revealed well-formed aortas. (2) Furthermore, an intracardiac conduit was computed for biventricular repair (Figure 1, panel C, D and E ...
In case your joints are wholesome, youll not really feel extreme ache sweeping the knees whenever you hit your ft with the bottom. This isnt a tacit understanding, completely, as a result of the knee muscle tissue had been purported to hit the knee bones with the fibula bone. Nevertheless it didnt occur as a result of the tissues, contained in the joint, act as shock absorbers, like springs that take in vitality, thus slowing the method of transferring energy from one bone to a different.. The shock absorbers characteristic primarily within the joint, due to the presence of cartilage and the fluid layer that fills the area between the bones. Cartilage cowl that shrouds the bones events associated to one another within the joint - like, article Teflon ( polytetrafluoroethylene - Teflon ) very strong and very clean. Cartilage is made up of cells that feed from a liquid known as synovial fluid that fills the joint area. This fluid incorporates proteins and sugars and is produced by a layer of ...
Results: A total of 65 full-text articles were examined in detail. Forty-six of the 65 articles did not meet the inclusion criteria. Nineteen articles involving 15 trials were identified for inclusion in the review. Only one study was considered to be at a low risk of bias. The included studies involved 396 patients and 535 implants. Comparing the test group using membranes with the control without membranes, a statistically significant difference was obtained for vertical variation of the peri-implant defect; the difference was 1.64 mm (three RCTs, 95% CI from 0.47 to 2.80 mm; P = 0.006, I2 = 0%) favouring the use of a membrane. Non-resorbable polytetrafluoroethylene (ePTFE) membranes obtained a complete clinical fill of defects more frequently than resorbable polylactide/polyglycolide (PLGA) membranes. The odds ratio was 0.15 (two RCTs, 95% CI from 0.04 to 0.64 mm; P = 0.01, I2 = 0%), favouring the use of ePTFE membranes. No differences were observed comparing nonresorbable ePTFE membranes and ...
1) What kinds of surface is the nie wieder bohren. system suitable for? Almost any smooth or rough surface is suitable if it is firm and able to bear the load in question. The nie wieder bohren. system is perfect for high-quality materials that one does not want to damage by drilling, like stone, ceramic (tiles), glass, concrete, metal, wood and many plastics. Unsuitable surfaces, on the other hand, include soft plaster, wallpaper and textiles(such as carpets), which do not provide sufficient firmness and support for surface attachments: There is no adhesion to polyethylene (PE), polypropylene (PP) and polytetrafluoroethylene (PTFE, Teflon). Although we have described as many examples as possible, our instructions can cover only some of the many surfaces and surface treatments that are suitable. The user is therefore advised to make preliminary tests when considering other types of surface. 2) Will the system work on rough surfaces too? Surface texture is not a factor that affects the bonding ...
Dear all, Im writing to request permission to use a solvent called Fluoroetch that is made by a company called acton technologies (http://www.actontech.com/fluor1.htm). The solvent is used to etch teflon surface to make it adhesive to glue (glue will not be used in the fab). Fluoropolymer films and sheest such as teflon must be etched on one side to bond them. We are looking into glueing microtubings made of teflon. The Fluoroetch solvent is a Sodium naphthalene complex in glycol ether. It is both flammable and toxic. The Flash point is at 158 F (70 C) and the autoignition temperature is at 370 F (188 C). The toxic elements are 2-Methoxyethyl ether and Sodium Naphthalene complex. I have attached the MSDS sheet for further information. Please do get back to me ASAP as Im looking to using it within the next week or so. Thank you for your time and consideration and I look forward to hearing from you very soon, Best regards, Noureddine -------------- next part -------------- A non-text attachment ...
different color filled ptfe teflon round rod bar Quick Detail: 1.diam 5mm to 300mm,length is 1m~6m 2.good quality,white,black 3.virgin or recycled 4.perfect ...
Auto vial Syringeless Filters are preassembled filtration devices for removing particulates from samples. They replace syringe-coupled filtration devices with a single, disposable unit.. Glass Microfiber(GMF) Glass Microfiber depth filter for samples in aqueous or organic solutions.. Nylon(NYL) Membrane for aqueous and organic samples within a PH range of 3-10.. Polytetrafluoroethylene(PTFE) Teflon® membrane for samples with ,50% organic solvent.. Polyvinlidene Fluoride (PVDF) Low nonspecific protein binding membrane for samples in aqueous solutions and/or organic solvents.. *Note: The most popular sizes are listed below. Other sizes and/or specials are available upon request.. ...
Type: Plastic; Electrical; Material: Polytetrafluoroethylene; Dimensions: ; Design Units: English; Outside Diameter: 0.660 inch (16.8 mm); Inside Diameter:
161-45000 - SBPTFE polytetrafluoroethylene spiral binding provides excellent fire protection and fulfils UL94 V0. The SBPTFE spiral binding offers superior protection against abrasion and extreme temperatures. SBPTFE spiral binding is very resistant against many chemicals.
Cardiac mri lexapro and voices provides more even pressure to the nerves that control the autonomic nervous system. Ep- ididymitis needs to be a manifestation of peripheral artery stents have polytetrafluoroethylene (ptfe) syn- thetic graft material, vinyon-n [1]. Renal replacement options for maintaining proper oral care; encourage the patient to void prior to emergent delivery, if necessary. The abnormality may be considered carefully in a topical gel glycerin-based gel such as pseudomonas aeruginosa, e. Coli, cryptosporidium, campylobacter, c. Difficile, cmv, m. Avium are negative; medications include vitamin supplements and water-soluble and fat-soluble organic substances needed for the family with a tumor (fig. Table 9. Family education and administration of oxygen, desired variability in expression and comprehension to varying degrees, the inability to constrict peripheral blood stem cell rescue in south america. Cardiovasc. Have there been pet contact. Severe functional and cosmetic ...
Patients, Angioplasty, Treatment, Anesthesia, Death, Death Rates, General Anesthesia, Incidence, Local Anesthesia, Stroke, Carotid Endarterectomy, Endarterectomy, Infection, Polyester, Polytetrafluoroethylene, Ptfe, Report, Surgery, Vein, Extremity
The GORE-TEX Soft Tissue Patch is a specialty biomaterial designed to meet the needs of the most demanding soft tissue repairs with minimal complications.
Price : Get Quote Pattern : Plain Temperature : -65˚F to 450˚ (-54˚C to 232˚C) Material : Teflon Teflon is ideal material for flexible hose, to which a wire over-braid is added for exceller pressure ratings. Such hose gives extremely long life because its inner core has outstanding resistance to steam, chemicals, solvent, heat, pressure impulses, flexing, vibration, and age. more ...
GORE-TEX® Extended Comfort Footwear keeps feet dry & comfortably cool. Ideal for moderate and warmer conditions and during higher activity levels.
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Polytetrafluoroethylene (Teflon)Edit. Polytetrafluoroethylene (PTFE) is a synthetic fluoropolymer of tetrafluoroethylene is ...
... a small flat non-absorbent pad normally composed of polytetrafluoroethylene, used as buttresses under sutures when there is a ... ". "Polytetrafluoroethylene Pledget". Dumville, JC; Coulthard, P; Worthington, HV; Riley, P; Patel, N; Darcey, J; Esposito, M; ...
Polytetrafluoroethylene (PTFE) (Teflon film) capacitors. Polytetrafluoroethylene (Teflon®). Lowest loss solid dielectric. ... and Polytetrafluoroethylene or Teflon (PTFE). Polypropylene film material with a market share of something about 50% and ...
Polytetrafluoroethylene (PTFE) 115 239[27] Teflon Poly(carbonate) (PC) 145 293[25] Lexan ...
The dielectric losses increase in this order: Ideal dielectric (no loss), vacuum, air, polytetrafluoroethylene (PTFE), ...
Some of these dielectrics are polytetrafluoroethylene (Teflon), FR-4, FR-1, CEM-1 or CEM-3. Well known pre-preg materials used ...
In 1969, Bob Gore stretched heated rods of polytetrafluoroethylene (PTFE) and created expanded polytetrafluoroethylene (ePTFE ... Expanded polytetrafluoroethylene is used in clothing due to its breathability and water protection capabilities. It is used in ... Specifically, expanded polytetrafluoroethylene (E-PTFE) can take the form of a fabric-like mesh. Implementing and applying the ... In the form of expanded polytetrafluoroethylene (E-PTFE), Gore-Tex has been shown to be a reliable synthetic, medical material ...
The polymer was polytetrafluoroethylene (PTFE). In 1945, DuPont commercialized PTFE as Teflon. They found that PTFE was ... Plunkett, Roy J. (15-18 April 1986). Seymour, Roy B.; Kirshenbaum, G.S. (eds.). The History of Polytetrafluoroethylene: ...
"The friction and transfer of polytetrafluoroethylene." Proceedings of the Royal Society of London. Series A. Mathematical and ...
He invented polytetrafluoroethylene (PTFE), i.e. Teflon, in 1938. Plunkett was born in New Carlisle, Ohio and attended Newton ... The tetrafluoroethylene in the container had polymerized into polytetrafluoroethylene, a waxy solid with amazing properties ... Plunkett, RJ The History of Polytetrafluoroethylene: Discovery and Development, pages 261-266 in "High Performance Polymers: ...
A variety of banding materials are used; one commonly used material is polytetrafluoroethylene. The band is wrapped around the ...
The chemical formula is (CF) n. In comparison, Teflon (polytetrafluoroethylene), -(CF2)n-, consists of carbon "chains" with ... Fluorographene is thermally stable, resembling polytetrafluoroethylene; however, chemically it is reactive. It can be ...
Polytetrafluoroethylene (PTFE), better known by its trade name Teflon, has many desirable properties which make it an ... Kim, Sung R. (2000). "Surface Modification of Poly(tetrafluoroethylene) Film by Chemical Etching, Plasma, and Ion Beam ... Kaplan, S. L.; Lopata, E. S.; Smith, Jared (1993). "Plasma Processes and Adhesive Bonding of Polytetrafluoroethylene". Surface ...
28 February 1961). Method of encapsulating a magnet with polytetrafluoroethylene." U.S. Patent No. 2,972,784. Washington, DC: U ... Method of encapsulating a magnet with polytetrafluoroethylene, 1961. Method of using and manufacturing plastic equivalent to ...
The best known fluoropolymer is polytetrafluoroethylene (Teflon). In 1938, polytetrafluoroethylene (DuPont brand name Teflon) ...
... polytetrafluoroethylene (PTFE) fluorinated ethylene propylene (FEP) [2]. carbon-fiber-reinforced polymers (FRP) Fiber- ...
The odour port is commonly glass or polytetrafluoroethylene. It is generally placed 30 - 60 cm away from the instrument, ...
The fluoropolymer polytetrafluoroethylene (PTFE/Teflon) is a solid. Hydrofluorocarbons (HFCs), organic compounds that contain ... accidentally discovered polytetrafluoroethylene (PTFE). Subsequent major developments, especially in the US, benefited from ...
In cases however where a vein can not be used, materials such as polytetrafluoroethylene (PTFE) or Dacron are often used to ... In some cases, synthetic graft materials (such as polytetrafluoroethylene) are used instead of a vein graft. Femoropopliteal ... Naoum, Joseph J.; Arbid, Elias J. (October 2012). "Bypass Surgery In Limb Salvage: Polytetrafluoroethylene Prosthetic Bypass". ...
Nowzari H, Slots J (1995). "Microbiologic and clinical study of polytetrafluoroethylene membranes for guided bone regeneration ... Nowzari, H; Slots, J (1995). "Microbiologic and clinical study of polytetrafluoroethylene membranes for guided bone ... Nowzari, Hessam; Matian, Fariborz; Slots, Jorgen (1995). "Periodontal pathogens on polytetrafluoroethylene membrane for guided ... Zarkesh, Niloofar; Nowzari, Hessam; Morrison, John L.; Slots, Jorgen (1999). "Tetracycline-Coated Polytetrafluoroethylene ...
Baden-Württemberg 1 would have used polytetrafluoroethylene PTFE propellant. John, R. R., Bennett, S., and Connors, J. P., " ...
Inanli S, Sari M, Baylancicek S (2007). "The use of expanded polytetrafluoroethylene (Gore-Tex) in rhinoplasty". Aesthetic ...
Polytetrafluoroethylene (PTFE). Elastomer. Depends on the grade of the polymer. Viton B is used in chemical process plants and ... Polytetrafluoroethylene. PTFE. Very low coefficient of friction, excellent dielectric properties, chemically inert. Low ... Polytetrafluoroethylene (PTFE). Very low coefficient of friction, excellent dielectric properties, high melting, chemically ...
It may use an electric propulsion system utilizing polytetrafluoroethylene PTFE. As of 2013[update] work on trajectories had ...
Grained polymers such as polytetrafluoroethylene do not have this property. High electrical resistance: Non-conducting ...
It may use an electric propulsion system utilizing polytetrafluoroethylene PTFE. As of 2013[update] work on trajectories had ...
Another commercial composite in 1981 incorporated polytetrafluoroethylene (nickel-phosphorus PTFE). However, the co-deposition ...
Polytetrafluoroethylene (Teflon). 1.35-1.38. [19]. Sugar solution, 25%. 1.3723. [20]. Cornea (human). 1.373/1.380/1.401. [21]. ...
Polytetrafluoroethylene (Teflon): Slides easily through tight contacts and does not fray.[1] ...
Composite polytetrafluoroethylene article and a process for making the same. US4332035 *. 28 Nov 1979. 1 Jun 1982. Sumitomo ... Porous structure of polytetrafluoroethylene and process for production thereof. US4385093 *. 6 Nov 1980. 24 May 1983. W. L. ... Very highly stretched polytetrafluoroethylene and process therefor. US4025679 *. 6 Aug 1976. 24 May 1977. W. L. Gore & ... Polytetrafluoroethylene porous material and process for producing the same. US5122154 *. 15 Aug 1990. 16 Jun 1992. Rhodes ...
Investigations of market injury to U.S. domestic industry by foreign companies due to product dumping and/or subsidization under Sections 701 or 731 under Title VII of the Tariff Act of 1930 or injury due to substantially increase imports under sections 201 or 202 of the Trade Act of 1974 or section 302 of the NAFTA Implementation Act ...
2004). "Polytetrafluoroethylene (PTFE) tape as a matrix in operative dentistry". Operative Dentistry. 29: 470-2. PMID 15279489. ... PolyTetraFluoroEthylene (PTFE) is a synthetic fluoropolymer of tetrafluoroethylene that has numerous applications. The well- ... "poly(tetrafluoroethylene) (CHEBI:53251)". ebi.ac.uk. Retrieved 12 July 2012.. .mw-parser-output cite.citation{font-style: ... "Polytetrafluoroethylene" - news · newspapers · books · scholar · JSTOR (May 2017) (Learn how and when to remove this template ...
After polytetrafluoroethylene fibrid formation, a random mixture of the polytetrafluoroethylene fibrids and the asbestos fibers ... forming said polytetrafluoroethylene fibrids by suspending particulate polytetrafluoroethylene in a fibrid inducing substrate, ... Polytetrafluoroethylene fibrid formation involves subjecting particulate polytetrafluoroethylene to shear conditions. The ... forming an aqueous slurry of asbestos fibers and polytetrafluoroethylene fibrids, wherein said polytetrafluoroethylene fibrids ...
dispersion of poly(tetrafluoroethylene) by fluxing in a No. Bolling mixer for minutes at 135 C. under a pressure of 40 p.s.i. ... Polytetrafluoroethylene coating compositions. US2951047 *. Dec 24, 1956. Aug 30, 1960. Du Pont. Preparation of filaments from ... Emulsion polytetrafluoroethylene micropowder additive for fiber-forming plastics. US7001951. Feb 11, 2003. Feb 21, 2006. Dupont ... 8. A process as in claim 1 wherein the said polyethylene and the said poly(tetrafluoroethylene) are blended at a temperature ...
The present invention provides improved compositions of expanded polytetrafluoroethylene (PTFE) and similar polymers and ... Method of making polytetrafluoroethylene composite sheet. US4273806 *. 15 Oct 1979. 16 Jun 1981. Stechler Bernard G. Method of ... Thermally conductive polytetrafluoroethylene article. US5750931 *. 1 Jun 1995. 12 May 1998. W. L. Gore & Associates, Inc.. ... Radially expandable tubular polytetrafluoroethylene grafts and method of making same. US6210789. 20 Feb 1997. 3 Apr 2001. W. L ...
Special Offer: Purchase more aerospace standards and aerospace material specifications and save! AeroPaks off a customized subscription plan that lets you pay for just the documents that you neeed, when you need them ...
Polymeric substrates include expanded polytetrafluoroethylene and polyethylene terephthalate, and the hydroxyl and/or amine ... For example, inert polymeric substrates, e.g., polytetrafluoroethylene, degrade when exposed to photochemical reactions and ... Bonding bio-active materials to expanded polytetrafluoroethylene or polyethylene terephthalate via an isocyanate-terminated ... Polymeric substrates include expanded polytetrafluoroethylene and polyethylene terephthalate, and the hydroxyl and/or amine ...
This specification covers an unfilled grade of virgin polytetrafluoroethylene (PTFE) resin in the form of extruded or molded ... Type 1 Virgin Polytetrafluoroethylene (PTFE) Moldings and Extrusions(STABILIZED Feb 2016) AMS3678/1C ... This specification covers an unfilled grade of virgin polytetrafluoroethylene (PTFE) resin in the form of extruded or molded ... Type 10 Virgin Polytetrafluoroethylene (PTFE) Moldings or Extrusions with 15% Carbon Fiber ...
... Liwen Mu,1,2 Jiahua Zhu,2 ... X. Feng, X. Diao, Y. Shi, H. Wang, S. Sun, and X. Lu, "A study on the friction and wear behavior of polytetrafluoroethylene ... ZnO nanoparticle reinforced polytetrafluoroethylene/polyimide (PTFE/PI) nanocomposites were prepared and their corresponding ... L. Mu, J. Chen, Y. Shi et al., "Durable polytetrafluoroethylene composites in harsh environments: tribology and corrosion ...
A vascular graft comprised of a tubular polytetrafluoroethylene (ePTFE) sheet is provided. The ePTFE sheet has a substantially ... 9 du Pont de Nemours & Co., Inc.) or of sheets of polytetrafluoroethylene are currently available, or 11 have been described in ... Expanded 12 polytetrafluoroethylene (ePTFE) tubes have a 13 microporous structure consisting of small nodes 14 interconnected ... a) preparing an expanded polytetrafluoroethylene substrate having a wall structure with an inside wall and an outside wall, b) ...
... and a polytetrafluoroethylene porous body which has pores and is held on the fluorine rubber molding, wherein the ... molding a polytetrafluoroethylene paste containing 100 parts by weight of a polytetrafluoroethylene powder and 7 parts by ... the polytetrafluoroethylene porous body being obtained by molding a polytetrafluoroethylene paste comprising 100 parts by ... wherein the polytetrafluoroethylene porous body is obtained by molding a polytetrafluoroethylene paste containing 100 parts by ...
15 Standard Specification for Aqueous Dispersions of Polytetrafluoroethylene , fluoropolymers, polytetrafluoroethylene, ... D4895 Specification for Polytetrafluoroethylene (PTFE) Resin Produced From Dispersion. E70 Test Method for pH of Aqueous ... Standard Specification for Aqueous Dispersions of Polytetrafluoroethylene. Active Standard ASTM D4441 , Developed by ... It covers only aqueous dispersions of polytetrafluoroethylene. It does not cover PTFE copolymers or filled dispersions. This ...
PRNewswire/ -- Based on Global Market Insights Inc., report, the Polytetrafluoroethylene Market was estimated at $1069.1 ... Some major findings of the polytetrafluoroethylene market report include:. *Technological advancement in the field of ... Polytetrafluoroethylene Market projected to exceed $1.3 billion by 2026, says Global Market Insights Inc. Increasing ... The dispersion segment will be growing at a CAGR of 5.2% in the global polytetrafluoroethylene market by 2026. This form is ...
A single-polymer polytetrafluoroethylene is extruded and then stretched and sintered to provide a differential porous PTFE ... Very highly stretched polytetrafluoroethylene and process therefor. US4031283 *. 23 Mar 1976. 21 Jun 1977. E. I. Du Pont De ... Porous polytetrafluoroethylene tubings and process of producing them. US4096227 *. 3 Dic 1975. 20 Jun 1978. W. L. Gore & ... Porous structure of polytetrafluoroethylene and process for production thereof. US4385093 *. 6 Nov 1980. 24 May 1983. W. L. ...
... breathable apparel is manufactured from polytetrafluoroethylene (PTFE) membrane laminated fabric using a specific process to ... One form of waterproof, breathable apparel is manufactured from polytetrafluoroethylene (PTFE) membrane laminated fabric using ...
polytetrafluoroethylene: A thermoplastic resin, (C2F4)n, that is resistant to heat and chemicals, has an extremely low ... This is a soft -- its a synthetic form of polytetrafluoroethylene, the same compound thats used in Gortex, but its made much ... But this year DuPont, which makes polytetrafluoroethylene (PTFE) resin, which is what Teflon was called when it first popped up ... Teflon nonstick pans: the nonstick Stuff is polytetrafluoroethylene which, when heated-as pans often are-releases toxic gasses ...
We report herein the preparation of novel low-density ultramicrocellular fluorocarbon foams and their application. These fluorocarbon foams are of interest for the biochemistry arena in numerous applications including foodstuff, pharmacy, wine making, beer brewery, fermentation medical laboratory, and other processing factories. All of those require good quality processing programs in which, after eliminating bacterium and virus, compressed air is needed. Ordinarily, compressed air contains bacterium and virus, its size is 0.01 - 2 micrometers fluorocarbon foam films. Having average porous diameter 0.04 - 0.1 micrometers , these are stable to high temperature (280 degree(s)C) and chemical environments, and generally have good engineering and mechanical properties (e.g., low coefficient of thermal expansion, high modulus, and good dimensional stability). Our new process for preparing low density fluorocarbon foams provides materials with unique properties. As such, they offer the possibility for ...
Polytetrafluoroethylene (PTFE) Market Trends & Forecast Up to 2018. Transparency Market Research Report Added ... http://www.transparencymarketresearch.com/polytetrafluoroethylene-ptfe-market.html. Categorization of Polyetetrafluoroethylene ...
Polytetrafluoroethylene (PTFE) is a fluoropolymer discovered by Roy J. Plunkett (1910-1994) of DuPont in 1938 and introduced as ...
16 Standard Specification for Polytetrafluoroethylene (PTFE) Resin Produced From Dispersion , coagulated dispersion ... Standard Specification for Polytetrafluoroethylene (PTFE) Resin Produced From Dispersion. Active Standard ASTM D4895 , ... 1.1 This specification2 covers polytetrafluoroethylene (PTFE) prepared by coagulation of a dispersion. These PTFE resins are ... D4441 Specification for Aqueous Dispersions of Polytetrafluoroethylene. D4591 Test Method for Determining Temperatures and ...
HOSE ASSEMBLY AND TUBING, POLYTETRAFLUOROETHYLENE, CLEANING METHODS FOR. ASTM A 262 : 2015 : REDLINE Standard Practices for ... TEST METHODS, HOSE ASSEMBLIES, POLYTETRAFLUOROETHYLENE (PTFE), METRIC. SAE AMS 5639 : 2017 STEEL, CORROSION-RESISTANT, BARS, ... HOSE ASSEMBLIES, POLYTETRAFLUOROETHYLENE, ARAMID REINFORCED, 135 DEGREE C, STANDARD DUTY, 28000/21000 KPA, HYDRAULIC, AIRCRAFT ...
HOSE ASSEMBLY, POLYTETRAFLUOROETHYLENE, METALLIC REINFORCED, UP TO 1500 PSI AND 450 DEGREES F, HYDRAULIC AND PNEUMATIC ...
Dielectric characteristics of polytetrafluoroethylene (PTFE) films modified by direct current discharge at the anode and ... Dielectric characteristics of polytetrafluoroethylene (PTFE) films modified by direct current discharge at the anode and ...
... notice announcing the initiation of an administrative review of the antidumping duty order on granular polytetrafluoroethylene ... Granular Polytetrafluoroethylene From Italy: Notice of Rescission of Antidumping Duty Administrative Review. A Notice by the ... On October 14, 2004, Solvay timely withdrew its request for an administrative review of granular polytetrafluoroethylene from ... Solvay requested an administrative review of the antidumping duty order on granular polytetrafluoroethylene from Italy. On ...
... polytetrafluoroethylene and polychlorotrifluoroethylene) were carried out between 2.5 and 20 K. In these experimental... ... Calorimeter Alla Polytetrafluoroethylene Polymer Sample Heat Pulse We are indebted to Drs. E. Leyarovski and L. Leyarovska from ... Specific heat of polytetrafluoroethylene and polychlorotrifluoroethylene within the temperature range 2.5-20 K. ... Low-temperature specific heat measurements on bulk technical polymer samples (polytetrafluoroethylene and ...
Department of Commerce is conducting an administrative review of the antidumping duty order on granular polytetrafluoroethylene ... Granular Polytetrafluoroethylene Resin From Japan: Preliminary Results of Antidumping Duty Administrative Review. A Notice by ... See Notice of Final Determination of Sales at Less Than Fair Value: Granular Polytetrafluoroethylene Resin From Japan, 53 FR ... See Notice of Antidumping Duty Order: Granular Polytetrafluoroethylene Resin from Japan, 53 FR 32267 (August 24, 1988). On ...
Polytetrafluoroethylene. Pulmonary Artery / abnormalities, surgery*. Pulmonary Circulation. Subclavian Artery / surgery*. ...
Expanded polytetrafluoroethylene in reconstruction of the canine biliary system. Am J Surg. 1982;143:221-4. [ Links ]. ... PURPOSE: Analyze the morphological and structural outcomes of a patch of expanded polytetrafluoroethylene in the treatment of ... After 30 days, this biliary occlusion was undone and a patch of expanded polytetrafluoroethylene replaced a fragment removed ... the expanded polytetrafluoroethylene prosthesis must be used with caution considering the potential risks for complications. ...
  • 4 . A porous material consisting essentially of highly crystalline polytetrafluoroethylene polymer, which material has a microstructure characterized by nodes interconnected by fibrils and has been radially pre-dilated. (google.ca)
  • 14. The method of claim 13 which further comprises providing a polymer resin consisting of polytetrafluoroethylene (PTFE). (google.co.uk)
  • A single-polymer polytetrafluoroethylene is extruded and then stretched and sintered to provide a differential porous PTFE structure composed of fibers and nodes connected. (google.es)
  • A single-polymer polytetrafluoroethylene is extruded and then stretched and sintered to provide a differential porous PTFE structure composed of fibers and nodes connected to one another by these fibers. (google.es)
  • Teflon is polytetrafluoroethylene (PTFE), a polymer of fluorinated ethylene. (madabout-kitcars.com)
  • Low-temperature specific heat measurements on bulk technical polymer samples (polytetrafluoroethylene and polychlorotrifluoroethylene) were carried out between 2.5 and 20 K. In these experimental investigations a heat pulse method and an adiabatic vacuum calorimeter were used. (springer.com)
  • Style TF1500 PTFE (polytetrafluoroethylene) is a high molecular weight polymer and one of the most versatile plastics known to man. (myguitarsolo.com)
  • polytetrafluoroethylene - poly·tet·ra·flu·or·o·eth·yl·ene .päl i .te trə .flu̇( ə)r ō eth ə .lēn n a polymer of tetrafluoroethylene (CF2 CF2)n that is a resin with good resistance to chemicals and heat and that is used to fabricate prostheses abbr. (enacademic.com)
  • Synthetic sutures made of expanded polytetrafluoroethylene (ePTFE, also known as Teflon), a nonabsorbable (i.e., nonbiodegradable) polymer. (optometricmanagement.com)
  • PTFE stands for PolyTetraFluoroEthylene, which is the chemical term for the polymer (CF2)n. (sealsales.com)
  • Polytetrafluoroethylene (PTFE) is a very stable polymer with a very low surface energy which makes it ideal for many non-stick applications. (3m.com)
  • Polytetrafluoroethylene (PTFE), also named "teflon," is well known for its extremely low friction coefficient and excellent chemical resistance [ 5 , 6 ]. (hindawi.com)
  • Teflon nonstick pans: the nonstick Stuff is polytetrafluoroethylene which, when heated-as pans often are-releases toxic gasses linked to cancer, organ failure, reproductive damage, and other harmful health effects. (wordnik.com)
  • For the manufacturer to insist the Swiss Diamond pans contain no Teflon whatsoever when it is made primarily from polytetrafluoroethylene , the chemical widely known as Teflon, is extremely deceptive. (wordnik.com)
  • Suppliers List, E-mail/RFQ Form, Molecular Structure, Weight, Formula, IUPAC, Synonyms for Polytetrafluoroethylene (PTFE) (CAS No. Other kinds of industrial polymers were observed to produce lethal atmospheres under less drastic conditions than either form of Teflon. (myguitarsolo.com)
  • Virgin PTFE (Polytetrafluoroethylene) is a performance plastic with a very high thermal stability and excellent chemical resistance , PTFE also known as Teflon has a very low coefficient of static and dynamic friction - one of the best of any solid material. (atexmaterials.com)
  • The key driver of this market is the feasible properties of polytetrafluoroethylene like inertness to chemicals, low dielectric strength, high thermal stability, and low coefficient of friction, making it a preferred material in end-user application industries. (micromarketmonitor.com)
  • A vascular graft comprised of a tubular polytetrafluoroethylene (ePTFE) sheet is provided. (google.com.au)
  • 1. An implantable vascular graft comprising an expanded polytetrafluoroethylene substrate, said substrate having a wall structure with an inside wall and an outside wall and including nodes and fibrils with pores present between said nodes and said fibrils, and a layer of resilient, bioresorbable material on at least part of one wall of said substrate, said material being substantially excluded from said pores. (google.com.au)
  • 8. The implantable vascular graft according to any one of Claims 1 to 7 wherein said graft is substantially more longitudinally resiliently extensible than uncoated expanded polytetrafluoroethylene substrate. (google.com.au)
  • Fibrin glue sealing of polytetrafluoroethylene vascular graft anastomoses: comparison with oxidized cellulose. (biomedsearch.com)
  • To evaluate potential clinical applications of nonautologous fibrin glue (FG) as a hemostatic agent in vascular surgery, we compared its efficacy to oxidized regenerated cellulose (OC) in hemostatically sealing polytetrafluoroethylene (PTFE) vascular graft anastomoses. (biomedsearch.com)
  • Argon plasma-pretreated polytetrafluoroethylene (PTFE) films were subjected to further surface modifications by near-UV light-induced graft copolymerization with acrylic acid (AAc), sodium salt of styrenesulfonic acid (NaSS), and N,N-dimethylacrylamide (DMAA). (nus.edu.sg)
  • Objectives We compared a conventional stent (Jostent Flex, Jomed GmbH, Rangendingen, Germany) with a polytetrafluoroethylene (PTFE)-membrane-covered stent (Jostent Stentgraft) in patients undergoing intervention of a stenosis in an obstructed vein graft. (onlinejacc.org)
  • This specification covers an unfilled grade of virgin polytetrafluoroethylene (PTFE) resin in the form of extruded or molded rods or tubes which are sintered after molding or, in the case of extrusions, sintered during the extrusion process. (sae.org)
  • This specification covers dry-powder resins of polytetrafluoroethylene (PTFE) resin produced from dispersion. (astm.org)
  • polytetrafluoroethylene - noun a tough synthetic resin used to make seals and bearings and to create a nonstick coating on cooking utensils. (enacademic.com)
  • This document addresses the specific properties of 40% bronze filled virgin polytetrafluoroethylene. (sae.org)
  • Unmodified PTFE, also known as virgin polytetrafluoroethylene, is manufactured from 100% pure polytetrafluoroethylene. (gminsights.com)
  • Polytetrafluoroethylene (PTFE) is a synthetic fluoropolymer of tetrafluoroethylene that has numerous applications. (wikipedia.org)
  • The white dome had been constructed of polytetrafluoroethylene , a synthetic fluoropolymer that was lighter than the air trapped inside the dome. (wordnik.com)
  • Polytetrafluoroethylene ( PTFE ) is a fluoropolymer discovered by Roy J. Plunkett (1910-1994) of DuPont in 1938 and introduced as a commercial product in 1946. (madabout-kitcars.com)
  • Polytetrafluoroethylene (PTFE) is a synthetic fluoropolymer of tetrafluoroethylene, and is a fluorocarbon solid. (myguitarsolo.com)
  • Polytetrafluoroethylene (PTFE) refers to the synthetic fluoropolymer derived from tetrafluoroethylene. (myguitarsolo.com)
  • Polytetrafluoroethylene or PTFE, as it is commonly known, is a versatile engineering plastic and is the most dominant fluoropolymer which accounts for more than half of the fluoropolymer consumption worldwide. (micromarketmonitor.com)
  • Polytetrafluoroethylene (PTFE), is a thermoplastic member of the fluoropolymer family of plastics. (sealsales.com)
  • The global Expanded Polytetrafluoroethylene market will reach xxx Million USD in 2017 with CAGR xx% 2018-2023. (reportsnreports.com)
  • Up Market Research (UMR), a prominent market research firm in its own industry, has published a detailed report on Global Expanded Polytetrafluoroethylene Market . (primefeed.in)
  • Expanded polytetrafluoroethylene (ePTFE) tubes have a microporous structure consisting of small nodes interconnected with many tiny fibrilla. (google.com)
  • Material breakage as an early complication of expanded Polytetrafluoroethylene (ePTFE) usage in frontalis suspension surgery for poor levator function blepharoptosis. (arvojournals.org)
  • To report the results and complications of frontalis suspension surgery using expanded polytetrafluoroethylene (ePTFE) for poor levator function blepharoptosis over a 2-year period. (arvojournals.org)
  • We report on the effectiveness of polytetrafluoroethylene (PTFE) covered stents in the treatment of two separate patients. (bmj.com)
  • The purpose of this study is to determine whether early use of transjugular intrahepatic portosystemic shunt (TIPS) with Polytetrafluoroethylene (PTFE) covered stents is able to prolong the survival in cirrhotic patients with high risk acute variceal bleeding. (clinicaltrials.gov)
  • forming said polytetrafluoroethylene fibrids by suspending particulate polytetrafluoroethylene in a fibrid inducing substrate, wherein said fibrid inducing substrate comprises a solid, granular, inert material which is easily separated from polytetrafluoroethylene fibrids, and subjecting said suspension to a compressive shearing action at a temperature between about 20 C. and about 250 C. (google.com)
  • On September 22, 2004, the Department of Commerce (the Department) published in the Federal Register a notice announcing the initiation of an administrative review of the antidumping duty order on granular polytetrafluoroethylene from Italy, covering the period August 1, 2003, through July 31, 2004. (federalregister.gov)
  • In accordance with 19 CFR 351.213 (b), on June 30, 2004, Solvay requested an administrative review of the antidumping duty order on granular polytetrafluoroethylene from Italy. (federalregister.gov)
  • On October 14, 2004, Solvay timely withdrew its request for an administrative review of granular polytetrafluoroethylene from Italy. (federalregister.gov)
  • The modified blalock-taussig shunt using microporous expanded polytetrafluoroethylene (PTFE). (biomedsearch.com)
  • 134 Pages Report] The Polytetrafluoroethylene (PTFE) market was valued at USD 1.87 billion in 2016 and is projected to reach USD 2.66 billion by 2022, at a CAGR of 6.1% from 2017 to 2022. (marketsandmarkets.com)
  • PTFE, or polytetrafluoroethylene , was discovered in 1938 by Dr. Roy Plunkett. (wordnik.com)
  • Polytetrafluoroethylene (PTFE) was accidentally discovered by Roy Plunkett in 1938 whilst he was trying to make a new CFC refrigerant. (goodfellowusa.com)
  • This specification establishes the properties and test methods for aqueous dispersions of polytetrafluoroethylene (PTFE) resins, and is used to determine if a shipment, lot, or container of PTFE dispersions is suitable for its intended use. (astm.org)
  • 1.1 This specification covers aqueous dispersions of polytetrafluoroethylene (PTFE) resins. (astm.org)
  • It covers only aqueous dispersions of polytetrafluoroethylene. (astm.org)
  • The present invention provides improved compositions of expanded polytetrafluoroethylene (PTFE) and similar polymers and methods for forming and using such compositions. (google.co.uk)
  • Polytetrafluoroethylene Market projected to exceed $1.3 billion by 2026, says Global Market Insights Inc. (prnewswire.com)
  • Oct. 20, 2020 /PRNewswire/ -- Based on Global Market Insights Inc., report, the Polytetrafluoroethylene Market was estimated at $1069.1 million in 2019 and is slated to exceed $1.3 billion by 2026, registering a CAGR of 5.5% from 2020 to 2026. (prnewswire.com)
  • The dispersion segment will be growing at a CAGR of 5.2% in the global polytetrafluoroethylene market by 2026. (prnewswire.com)
  • Aug 06, 2019 (Heraldkeepers) -- The global Medical Polytetrafluoroethylene Market is expected to reach USD 504.24 million by 2026, according to a new report by Reports and Data. (marketwatch.com)
  • What will be the growth rate of the Medical Polytetrafluoroethylene (PTFE) market for the forecast period, 2019 to 2026? (marketwatch.com)
  • Polytetrafluoroethylene Market size was valued at USD 1.07 billion in 2019 and is estimated to exhibit over 5% CAGR from 2020 to 2026. (gminsights.com)
  • Dielectric characteristics of polytetrafluoroethylene (PTFE) films modified by direct current discharge at the anode and cathode have been studied as a function of frequency and temperature. (springer.com)
  • IEC 61196-10:2014(E) applies to semi-rigid coaxial communication cables with polytetrafluoroethylene (PTFE) dielectric and tubular outer conductor. (document-center.com)
  • We describe a patient treated with expanded polytetrafluoroethylene who had documented patency 12 years after the operation. (elsevier.com)
  • 2. The process of claim 1, wherein said heating of said dry mat is at temperatures between the fusion temperature of the polytetrafluoroethylene fibers (327 C. 10 C.) and 370 C. (google.com)
  • A 260°C (500°F) maximum service temperature, 100% polytetrafluoroethylene coated felt filter bag that incorporates a conductive staple to offer static dissipation in pulse jet style dust collectors with chemically aggressive operating conditions. (membrane-solutions.com)
  • Polytetrafluoroethylene sleeving is used principally where very high operating temperature is required or where severe contamination from fluids may occur. (hilltop-products.co.uk)
  • it retains its physical properties over a wide temperature range (-270° to 250° C, or -450° to 480° F). These qualities suit polytetrafluoroethylene to uses in gaskets, bearings, linings for containers and pipes, and parts for valves and pumps that must operate in corrosive environments and for protective coatings on cooking utensils, saw blades, and other articles. (enacademic.com)
  • This study is prospective randomized trial enrolling at least 50 participants which compares efficacy and safety of two alternative methods of laparoscopic hiatal repair for giant (i.e. with hiatal surface area (HSA) exceeding 20 sq.cm) types II and III hiatal hernias: partially absorbable lightweight mesh repair, and nitinol-framed lightweight polytetrafluoroethylene (PTFE) mesh repair. (clinicaltrials.gov)
  • Polytetrafluoroethylene" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (uchicago.edu)
  • The following table lists molecular weight data for a polytetrafluoroethylene material. (myguitarsolo.com)
  • PTFE material (Polytetrafluoroethylene) is used by Elekem to manufacture products suitable for a range of industries. (elekem.com)
  • 2. The assembly as claimed in claim 1, wherein the polytetrafluoroethylene porous body and the fluorine rubber molding are adhered with an adhesive. (freepatentsonline.com)
  • 3. The assembly as claimed in claim 1, wherein the polytetrafluoroethylene porous body is provided on a position to be held under a state of the fluorine rubber molding being unvulcanized or semi-vulcanized, and the fluorine rubber molding and the provided polytetrafluoroethylene porous body are heated to vulcanize the fluorine rubber molding, so as to integrate the fluorine rubber molding and the polytetrafluoroethylene porous body. (freepatentsonline.com)
  • 4. The assembly as claimed in claim 1, wherein the polytetrafluoroethylene porous body has one of grooves and projections, the fluorine rubber molding has other of grooves and projections, and the polytetrafluoroethylene porous body is held on the fluorine rubber molding such that the grooves and projections formed respectively are fitted. (freepatentsonline.com)
  • 5. The assembly as claimed in claim 1, further comprising a ring member provided around the polytetrafluoroethylene porous body. (freepatentsonline.com)
  • 6. The assembly as claimed in claim 1, wherein the polytetrafluoroethylene porous body is plated with a metal. (freepatentsonline.com)
  • The present invention relates to an assembly including a polytetrafluoroethylene (hereinafter referred to as "PTFE") porous body. (freepatentsonline.com)
  • Increasing polytetrafluoroethylene demand in variety of industries will propel market growth over forecast timeframe, says this report. (prnewswire.com)
  • The unmodified segment will hold a considerable share of the overall polytetrafluoroethylene market in the projected timeframe. (prnewswire.com)
  • Rising production of vehicles along with increasing penetration of electric cars across the globe will drive the polytetrafluoroethylene market growth in the automotive sector. (prnewswire.com)
  • North America will hold a considerable share in the global polytetrafluoroethylene market over the projected timeframe. (prnewswire.com)
  • Transparency Market Research Report Added 'Polytetrafluoroethylene (PTFE) Market' to its database. (sbwire.com)
  • Global market for Polytetrafluoroethylene (PTFE) has reached 165 thousand metric tons in 2015 and is projected to reach 247 thousand metric tons by 2022 at a CAGR of 5.6% between 2016 and 2022. (myguitarsolo.com)
  • The global polytetrafluoroethylene (PTFE) market has been anticipated by Transparency Market Research (TMR) to bring large-scale vendors to the fore while bearing a highly concentrated nature. (transparencymarketresearch.com)
  • Saint Gobain, W.L.Gore & Associates Inc, Donaldson Company, Sumitomo Electric, Pall Corporation, Markel, Zeus Inc., Chukoh Chemical Industries Ltd. Donaldson Company is a crucial player in the Medical Polytetrafluoroethylene market. (marketwatch.com)
  • What are challenges and threats faced by the prominent vendors operating in the Medical Polytetrafluoroethylene (PTFE) market? (marketwatch.com)
  • (Presseportal openBroadcast) - The global polytetrafluoroethylene (PTFE) market is highly concentrated, with the large-scale manufacturers at the fore. (openbroadcast.de)
  • The global polytetrafluoroethylene (PTFE) market is highly concentrated and is led by large multinational corporations. (hexaresearch.com)
  • The polytetrafluoroethylene market in North America is witnessing a high growth due to its growing end-user applications and technological advancements. (micromarketmonitor.com)
  • The report, "North America Polytetrafluoroethylene Market", defines and segments the market in the region by analyzing and forecasting the size with respect to volume (KT) and value ($ million). (micromarketmonitor.com)
  • The North American polytetrafluoroethylene market report covers country-wise trends and includes countries such as the U.S. and others. (micromarketmonitor.com)
  • The polytetrafluoroethylene market holds significant share of overall fluoropolymers industry. (gminsights.com)
  • Growing production of chemicals around the globe will further create need for polytetrafluoroethylene market in the sector. (gminsights.com)
  • The Expanded Polytetrafluoroethylene market report talks about the competitive scenario among the industry players and imparts aspiring and emerging industry players with the future market insights in a detailed manner. (primefeed.in)
  • Amidst the COVID-19, few segments of the market have witnessed a disruption due to the gap in supply and demand which has impacted the growth of the Expanded Polytetrafluoroethylene market. (primefeed.in)
  • Up Market Research (UMR) provides yearly updates on the Expanded Polytetrafluoroethylene market that assist the clients to stay ahead in the competitive space. (primefeed.in)
  • Owing to their features such as easy installation, corrosion resistance and rugged design, these portable Polytetrafluoroethylene Bellows are highly acknowledged in the global market. (bellowsmanufacturer.in)
  • ZnO nanoparticle reinforced polytetrafluoroethylene/polyimide (PTFE/PI) nanocomposites were prepared and their corresponding tribological and mechanical properties were studied in this work. (hindawi.com)
  • Instead, we secured a polytetrafluoroethylene patch over the defect with pledget-reinforced, braided, nonabsorbable, handsewn mattress sutures, followed by reinforcement with laparoscopic tacking screws. (nih.gov)
  • One form of waterproof, breathable apparel is manufactured from polytetrafluoroethylene (PTFE) membrane laminated fabric using a specific process to seal seams that have been sewn with traditional techniques. (cdc.gov)
  • heating said deposited slurry to dry said mat, and thereafter heating said dry mat to temperatures about 290 C., to shrink and/or fuse said polytetrafluoroethylene fibrids in said dried mat to form a matrix holding said asbestos fibers in a polytetrafluoroethylene fibrid and asbestos fiber containing diaphragm, said fused deposit containing polytetrafluoroethylene fibrids comprising from about 5 to about 25 percent by weight of said diaphragm. (google.com)
  • heating said deposited slurry to dry said mat, and thereafter heating said dry mat to temperatures above about 290 C., to shrink and/or fuse said polytetrafluoroethylene fibrids in said dried mat to form a matrix holding said asbestos fibers in a polytetrafluoroethylene fibrid and asbestos fiber containing diaphragm. (google.com)
  • 8. A diaphragm for an electrolytic cell containing polytetrafluoroethylene fibrids and asbestos fibers made by the process of claims 1 or 4. (google.com)
  • Polytetrafluoroethylene is extensively utilized as coating on variety of equipment including vessels, laboratory equipment, pipework, fuel cell , etc. in chemical industry. (gminsights.com)
  • Although a feasible option for the treatment of biliary duct iatrogenic lesions, the expanded polytetrafluoroethylene prosthesis must be used with caution considering the potential risks for complications. (scielo.br)
  • Polytetrafluoroethylene (PTFE) shows a remarkable chemical resistance and it is insoluble in all known solvents. (plastic-industry.com)
  • Our single-center experience serves as one of the largest reviews of caval reconstruction using polytetrafluoroethylene (PTFE) interposition grafts published in the past 10 years. (bioportfolio.com)
  • This invention relates to vascular prostheses of polytetrafluoroethylene. (google.com)
  • Removal of surgical barriers of expanded polytetrafluoroethylene at second- look laparoscopy was not associated with adhesion formation. (lexic.us)
  • Airborne nanoparticle concentrations in the manufacturing of polytetrafluoroethylene (PTFE) apparel. (cdc.gov)
  • Polymeric substrates include expanded polytetrafluoroethylene and polyethylene terephthalate, and the hydroxyl and/or amine functionality may be provided on the substrate surface by plasma glow discharge. (google.co.uk)
  • a) preparing an expanded polytetrafluoroethylene substrate having a wall structure with an inside wall and an outside wall, b) preparing a solution of gel, c) covering at least one wall of said substrate with a coating of said gel, and cross-linking said coating. (google.com.au)
  • Upon checking a frozen, compressed sample of tetrafluoroethylene, he and his associates discovered that the sample had polymerized spontaneously into a white, waxy solid to form polytetrafluoroethylene (PTFE). (coursehero.com)
  • We report vibrational Raman spectra of small extended perfluoro-n-alkanes (C{n}F{2n+2} with n=6, 8-10, 12-14) isolated in supersonic jet expansions and use wavenumbers of longitudinal acoustic vibrations to extrapolate the elastic modulus of cold, isolated polytetrafluoroethylene filaments. (scienceopen.com)
  • Why one should buy this Expanded Polytetrafluoroethylene Report? (primefeed.in)
  • The implants are typically silicone or polytetrafluoroethylene ," he said. (wordnik.com)
  • Polytetrafluoroethylene (PTFE) (CAS No. For the production of densified PTFE powder, there is known a process comprising pyrolysing high molecular weight PTFE to decrease a molecular weight (cf. (myguitarsolo.com)
  • PTFE Gasket (Polytetrafluoroethylene Gasket) is molded or skived or cut from virgin PTFE powder or compounds, sheets, rods, tube etc. (heroos.com)