Double lumen tubing design for catheter

A - Human Necessities – 61 – M

Patent

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Details

A61M 25/00 (2006.01)

Patent

CA 2278561

A double lumen tubing which is adapted for use as a catheter. The tubing accommodate multiple sized guidewires and has increased resistance to kinking. A lumen wall divides the outer tubular wall into the two lumens and has a central arcuate portion shaped to allow insertion of relatively large guidewires through one of the lumens, while still leaving space for smaller guidewires through the other lumen. Resistance to kinking is increased by varying internal diameters or axes of the interior lumen walls to increase the wall thickness of the tubing in selected areas, and by varying the thickness of the wall that divides both lumens in the middle or where the dividing wall meets the outer tubular wall.

L'invention concerne un tubage à deux lumières qui est conçu pour servir de cathéter. Le tubage contient des guides métalliques de tailles multiples et présente une résistance accrue au coudage. Une paroi de lumière divise la paroi tubulaire extérieure en deux lumières, et présente une partie arquée centrale formée de façon à permettre une insertion de guides métalliques relativement gros à travers l'une des lumières, tout en laissant de la place pour laisser passer des guides métalliques plus petits à travers, l'autre lumière. On accroît la résistance au coudage en faisant varier des diamètres ou des axes internes de parois intérieures de lumières pour augmenter l'épaisseur du tubage à des zones sélectionnées, et en faisant varier l'épaisseur de la paroi divisant les lumières par le milieu, ou à l'endroit où cette paroi rencontre la paroi tubulaire extérieure.

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