Interior liner for tubes, pipes and blood conduits

A - Human Necessities – 61 – F

Patent

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Details

A61F 2/06 (2006.01) A61B 17/12 (2006.01) B29C 55/24 (2006.01) B29C 63/34 (2006.01) F16L 11/12 (2006.01) A61F 2/00 (2006.01) B29C 47/00 (2006.01) B29C 53/58 (2006.01)

Patent

CA 2226635

A tube which circumferentially distends from its initial circumference upon the appli- cation of a circumferentially distending force such as applied by an internal pressure, and which exhibits minimal recoil following the re- moval of the circumferentially distending force. The tube preferably has a second circumfer- ence larger than the initial circumference which remains substantially unchanged by further in- creasing force once it has been achieved. Be- cause of the distensible circumference and min- imal recoil of the tube, the tube is useful as a liner for pipes and vessels and particlarly for pipes and vessels having irregular internal sur- faces towhich the tube can smoothly conform. The tube is preferably made from porous PTFE with thin walls, in which form it is particularly useful as a liner for both living and prosthetic blood vessels and to line anastomoses between living and prosthetic blood vessels.

Tube, dont la circonférence se détend à partir de sa circonférence initiale lorsqu'on lui applique une force d'extension circonférentielle, telle que la force exercée par une pression intérieure, et qui présente une détente minimum après la suppression de ladite force. Ce tube possède, de préférence, une deuxième circonférence plus grande que la circonférence initiale et ne subissant sensiblement aucune modification sous l'effet de l'accroissement de la force, une fois qu'elle a été atteinte. Etant donné la circonférence extensible et la détente minimum du tube, ce dernier est utile en tant que revêtement de conduits et de vaisseaux, particulièrement pour des conduits et des vaisseaux dont les surfaces intérieures sont irrégulières et auxquelles le tuyau peut s'adapter sans effort. Ce tube est fabriqué, de préférence, en PTFE poreux et possède des parois minces, ce qui permet de l'utiliser avantageusement en tant que revêtement pour des vaisseaux sanguins vivants ou artificiels, ainsi que pour doubler des anastomoses entre les vaisseaux sanguins vivants et les vaisseaux artificiels.

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