Many surgeons consider PTFE to be the conduit of choice for above-knee femoropopliteal bypass grafting, since PTFE is relatively easy to implant and spares autogenous saphenous vein (ASV) for subsequent peripheral or coronary artery bypass grafting (CABG). This practice has recently been challenged, as some studies have suggested that ASV may exhibit superior patency in certain patient subgroup...

Thermoplastic copolyester elastomer (TCE) and Polyoxymethylene (POM) filled polytetrafluroethylene (PTFE) composite, reinforced with short glass fiber (SGF) and different shape microfillers such as short carbon fiber (SCF), silicon carbide (SiC) and alumina (Al2O3) were prepared by melt mixing method using twin screw extruder followed by injection moulding. Mechanical properties such as tensile...

A polytetrafluoroethylene (PTFE)-covered stent is specially used to treat coronary perforation complicating percutaneous intervention in order to prevent the aneurysm from rupturing, but until now it has not been known if endothelialization occurs inside this type of stent. A patient with a giant aneurysm of the right coronary artery underwent successful implantation of a PTFE-covered stent. An...

Samples of DuPont 7A and 7C Teflon (PTFE, poly(tetrafluoroethylene)) were tested in compression at strain-rates between 10 and 1 s and temperatures between K198 and 200 8C. Additionally, using a Split-Hopkinson pressure bar, a temperature compression series was undertaken between K100 and 150 8C at a strain rate of 3200 s. To investigate the small-strain response, strain gauges were used to mea...

The aim of the study was to evaluate the possibility to obtain guided bone regeneration with two types of physical barriers (calcium sulfate and PTFE nonporous barrier) in surgical defects created in rat parietal bones. In the right parietal bone the calcium sulfate barrier filled out the whole defect and in the left parietal bone the barrier of PTFE was positioned in the floor and externally t...

In patients highly suspected of developing steal syndrome, the subscapular artery may be a good supplier for functional prosthetic arteriovenous access, as well as a good solution for the prevention of steal syndrome. A 51-year-old woman was preparing to have a loop shaped polytetrafluoroethylene (PTFE) graft placed at the left upper extremity. The diameter of subscapular the artery was 3 mm. A...

In this work, a new framework and model for the digital generation and characterization of the microstructure of GDL materials with localized binder and polytetrafluoroethylene (PTFE) distributions were developed using 3D morphological imaging processing. This new generation technique closely mimics manufacturing processes and produces for the first time complete phase-differentiated (void, fib...

A novel method for immobilization of bacteria and Saccharomyces cerevisiae cells is described. Microorganisms may be entrapped in a matrix of poly(tetrafluoroethylene) (PTFE) fibrils. Cells are blended with an aqueous emulsion of PTFE stabilized with Triton X-100 surfactant to form a thick paste. The paste is calendered biaxially in a standard rubber mill. This process causes fibrillation of th...

The paper deals with the study of processes obtaining polymer composites by chemo-mechanical activation technology (CMA-technology). methods research and testing composite materials based on polytetrafluoroethylene (PTFE) carbon fibers are analyzed generalized. influence CMA structure properties PTFE was determined.

Abstract PTFE/Al, as a kind of typical reactive material with high energy density and impact-induced reaction characteristics, has attracted extensive attention. Three kinds PTFE/Al/oxide materials were designed fabricated by introducing CuO, Fe 2 O 3 , MoO into their dynamic mechanical responses studied SHPB experiments. The results showed that the sample cracked undergoing strain rate compres...