نتایج جستجو برای: ptfe patch repair
تعداد نتایج: 177868 فیلتر نتایج به سال:
BACKGROUND Cohort studies suggest superior long-term patency of luminal heparin-bonded polytetrafluoroethylene (Hb-PTFE) bypass grafts compared with standard PTFE grafts. The aim of this study was to compare the outcomes of Hb-PTFE grafts with those of standard PTFE grafts 5 years after a randomized trial. METHODS Patients with intermittent claudication or critical limb ischaemia requiring fe...
Hymenoplasty is a surgery that doctors perform to repair girl `s virginity who lost it through virginal intercourse or other accidents. During their practice, doctors may face demands that do not have a therapeutic effect and are derived from the cultural and customary considerations of society. Given the fact that the doctor should also consider the patient's greatest benefit in such cases and...
In the research presented in this paper, a failure analysis were carried out to identify causes of an incident, which had taken place after an operation to repair a leak in an interstate natural gas pipeline. In this operation, a partial encirclement reinforcement (patch) was welded to the carrier pipe according to an available hot taping procedure, while gas was flowing in the pipeline. The fa...
Tribological properties of Ethylene-Propylene-Diene-rubber (EPDM) containing electron modified Polytetrafluoroethylene (PTFE) have been investiagted with the help of pin on disk tribometer without lubrication for a testing time of 2 hrs in atmospheric conditions at a sliding speed and applied normal load of 0.05 m·s–1 and FN = 1 N, respectively. Radiation-induced chemical changes in electron mo...
PURPOSE To evaluate the efficacy of porous expanded polytetrafluoroethylene (e-PTFE, Goretex) containing large pores made with a 21-gauge needle as a graft for the correction of lower lid retraction. METHODS e-PTFE grafts were implanted between the tarsus and lower lid retractor via a transconjunctival approach with/without amniotic membrane transplantation, or via a transcutaneous approach. ...
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