Hemodialysis access achieved through a prosthetic vascular graft has become more popular, especially in diabetic and older patients and those who have had several unsuccessful surgical accesses. From January to December 1996, we implanted a newly available expanded polytetrafluoroethylene (ePTFE) graft (DIASTAT Vascular Access Graft) that allows early cannulation in 18 patients (11 men and 7 women; mean age +/- SD, 63.7 +/- 11 years). Thirteen of these patients had at least one failed vascular access. All grafts were cannulated for dialysis within 7 days of implantation, with flow rates > or = 300 ml/min. The time to hemostasis after the first cannulation ranged from 2 to 4 min. The primary patency rate at one year was 56%. Four grafts developed thrombosis requiring surgical intervention; three were salvaged and one was removed. The one-year assisted or cumulative patency rate was 72%. One patient had persistent bleeding requiring graft revision immediately after surgery. The bleeding stopped and its origin was not determined. There were no graft infections or hematomas. Because of the early cannulation possible with the DIASTAT graft, as well as the lesser time to hemostasis than that generally achieved with standard ePTFE grafts, this prosthesis is a good alternative to autogenous access construction.
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Ann Thorac Surg Short Rep
December 2024
Institute for Integrated Life Skills, LLC, Bermuda Run, North Carolina.
Background: The expanded polytetrafluoroethylene (ePTFE) valved conduit (VC) has been reported for pulmonary valve replacement (PVR). The purpose of this study was to review long-term outcomes of our trileaflet ePTFE VC.
Methods: This multicenter study was performed with institutional review board approval from each institution.
Polymers (Basel)
December 2024
School of Mechanical and Electrical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
Currently, few studies have been conducted on the use of fluorocarbon resin (FEVE) and polytetrafluoroethylene (PTFE) as adhesive substrates and lubricating and anti-corrosion fillers, respectively, for the fabrication of PTFE-reinforced fluorocarbon composite coatings. In this paper, the tribological properties of polytetrafluoroethylene-reinforced fluorocarbon composite coatings were investigated through orthogonal tests under various operating conditions. The optimal configuration for coating preparation under dry friction and aqueous lubrication was thus obtained: the optimal filler particle size, mass ratio of FEVE to PTFE, spraying pressure, and curing agent content were 50 μm, 3:4.
View Article and Find Full Text PDFCureus
November 2024
Hepato-Pancreato-Biliary Surgery and Liver Transplantation, London Bridge Hospital, London, GBR.
Injuries to the inferior vena cava (IVC) carry high risks and mortality rates. We present a case of suprahepatic IVC injury that was successfully treated with polytetrafluoroethylene (PTFE) graft insertion without cardiopulmonary bypass. A 46-year-old woman was transferred to our trauma centre after a high-speed motor vehicle collision.
View Article and Find Full Text PDFJ Air Waste Manag Assoc
December 2024
Air Quality Research Center, University of California, Davis, California, USA.
The IMPROVE program (Interagency Monitoring of PROtected Visual Environments) tracks long-term trends in the composition and optics of regional haze aerosols in the United States. The absorptance of red (633-nm) light is monitored by filter photometry of 24 h-integrated samples of fine particulate matter (PM 2.5).
View Article and Find Full Text PDFAnn Thorac Surg
December 2024
Division of Cardiovascular Surgery of the Peter Munk Cardiac Centre, Toronto General Hospital and University of Toronto, Toronto, Ontario, Canada. Electronic address:
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