Embolectomy catheter and method for making same

Details Embolectomy catheter and method for making same Embolectomy catheter and method for making same

A - Human Necessities

61

M

A61M 25/00 (2006.01) A61B 17/00 (2006.01) A61B 17/22 (2006.01) A61M 25/10 (2006.01)

Patent

CA 2199418

A catheter (10) having walls defining a lumen extending between a proximal end (16) and a distal end (18). First portions (41) of the tube disposed at the distal end (18) include first wall portions providing the lumen with a first inside diameter less than about 3F. Second portions (45) of the tube disposed proximally of the first portions (41) include a second wall portion with an inside diameter greater than the first inside diameter. A balloon (23) disposed at the distal end (18) of the tube along the first portions (41) of the tube is inflatable by introducing a liquid into the lumen (25) and deflated by removing the liquid from the lumen (25). The first wall portions with an inside diameter less than bout 0.010 inches have a tendency to form an air lock during deflation of the balloon. The first portions (41) of the tube having a first length sufficiently short to inhibit formation air lock during deflation of the balloon.

Cathéter (10) dont les parois délimitent une lumière s'étendant entre une extrémité proximale (16) et une extrémité distale (18). Les premières sections (41) du tube disposées à l'extrémité distale (18) comprennent les premières sections de la paroi qui confèrent à la lumière un diamètre de moins de 3 F. Les deuxième sections du tube situées en amont des premières sections (41) comportent une deuxième section de paroi dont le diamètre intérieur est supérieur au premier. Un ballonnet (23) placé à l'extrémité distale (18) du tube et le long de sa première section (41) se gonfle lorsqu'on introduit un liquide dans la lumière (25) et de dégonfle lorsqu'on l'en (25) retire. Les premières sections de la paroi, dont le diamètre est inférieur à environ 0,010 pouce, tendent à former un bouchon d'air lors du dégonflage du ballon. La première section (41) du tube présente une première longueur suffisamment réduite pour empêcher la formation dudit bouchon pendant le dégonflage du ballon.

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