Guidewire-centering catheter tip

Details Guidewire-centering catheter tip Guidewire-centering catheter tip

A - Human Necessities

61

M

A61M 25/00 (2006.01) A61F 2/01 (2006.01) A61M 25/01 (2006.01)

Patent

CA 2510988

A catheter (10) for use with a guidewire (12), the catheter having (10) a distal tip (11) that centers the guidewire (12) even when the catheter (10) is severely bent, thereby avoiding protrusion of the distal tip (11) of the catheter (10) at the outer meridian of the catheter bend and reducing the risk of the catheter tip (11) catching on the luminal surface of the adjacent vasculature. The distal tip (11) of the catheter (10) incorporates at least one guidewire bearing (30), preferably multiple bearings (30) in the form of longitudinally oriented ribs (31), which provide the centering characteristic with minimal friction between the inner surface of the catheter distal tip (11) and the outer surface of the guidewire (12). Preferably, at least four guidewire bearings (30) are provided.

L'invention concerne un cathéter utilisé avec un fil-guide et présentant un embout distal qui centre le fil-guide même lorsque le cathéter est extrêmement coudé, évitant ainsi une protubérance de l'embout distal du cathéter au niveau du méridien extérieur de l'incurvation du cathéter et réduisant le risque que l'embout du cathéter ne s'accroche sur la surface luminale du système vasculaire adjacent. L'embout distal du cathéter comprend au moins un appui de fil-guide et, de préférence, plusieurs appuis sous forme de nervures orientées longitudinalement, qui fournissent la caractéristique de centrage avec une friction minimale entre la surface intérieure de l'embout distal du cathéter et la surface extérieure du fil-guide. On utilise de préférence au moins quatre appuis de fil-guide.

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