نتایج جستجو برای: polytetrafluoroethylene

تعداد نتایج: 2980  

Journal: :Interactive CardioVascular and Thoracic Surgery 2007

2011
Jakub Siegel Robert Krajcar Zdeňka Kolská Vladimír Hnatowicz Václav Švorčík

Gold nanolayers sputtered on polytetrafluoroethylene (PTFE) surface and their changes induced by post-deposition annealing at 100°C to 300°C are studied. Changes in surface morphology and roughness are examined by atomic force microscopy, electrical sheet resistance by two point technique, zeta potential by electrokinetic analysis and chemical composition by X-ray photoelectron spectroscopy (XP...

Journal: :European journal of cardio-thoracic surgery : official journal of the European Association for Cardio-thoracic Surgery 2006
Eric Bezon Ahmed Ismail Abdel Aziz Khalifa Jean Noël Choplain Jean Aubert Barra

A homemade mitral annular prosthesis has been developed using expanded-polytetrafluoroethylene material. It is safe in that it avoids the risk of prosthesis wrinkle when stitches are tied. Simultaneously, it is strong enough to prevent future stretching and rupture. This device has been implanted in 60 patients with good and stable results at 42 months of follow-up. Our flexible mitral annular ...

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