A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
A61M 25/00 (2006.01)
Patent
CA 2237574
A tapered single or multi-lumen catheter having an elongated cylindrical tube for injection and removal of fluid, is provided with generally constant or gradually increasing diameter internal lumen or lumens which are connected to a tip portion which may be a conical tapered tip that smoothly merges with the cylindrical surface of the tube so that insertion trauma and the possibility of kinking are minimized. The catheter body is generally formed of proximal and distal portions wherein the proximal portion preferably includes a portion which increases in external diameter in the proximal direction to provide a strain relief for the intersection of the catheter body and the hub member of the catheter. The portion of the catheter body which increases in diameter may also include one or more lumens therein which similarly increase in diameter to increase the flow of fluid therethrough or which are of constant diameter such that the outer wall of the catheter body increases in thickness therealong to increase the columnar strength of the catheter body therealong.
L'invention concerne un cathéter effilé (50) à un seul lumen ou un cathéter effilé (10, 70) à plusieurs lumens ayant un tube cylindrique allongé (28) pour injecter ou évacuer un fluide et ayant un ou des lumens (16, 18) dont le diamètre interne est constant ou augmente graduellement. Ces lumens aboutissent à une extrémité effilée (26), par exemple conique, prolongeant la surface cylindrique du tube (28). Un tel cathéter permet de minimiser le caractère traumatisant de l'introduction et le risque qu'il se plie. Le corps du cathéter a des extrémités proximale et distale. L'extrémité proximale comprend, de préférence, une portion (30) dont le diamètre externe augmente dans la direction proximale, pour diminuer les contraintes à l'intersection du corps (12) du cathéter et la bague (20) du cathéter. La portion du corps du cathéter dont le diamètre augmente peut également avoir un ou plusieurs lumens dont le diamètre augmente de manière similaire, pour augmenter le flux de fluide traversant, ou qui ont un diamètre constant, de sorte que la paroi externe (32) du corps du cathéter augmente en épaisseur suivant sa longueur, pour augmenter la solidité de la colonne qu'est le corps du cathéter.
Marks & Clerk
Quinton Instrument Company
Tyco Group S.a.r.l.
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