Thrombus-aspiration catheter

摘要

It is intended to provide a thrombus-aspiration catheter capable of exerting flexibility and aspiration force even in the case where the tube in the front end side is a triple lumen tube or a contrast marker is provided at the front end. A thrombus-aspiration catheter (1) comprising a basal end side tube (2) of the double lumen type which has an aspiration lumen (11) and a core wire lumen (12), and a front end side tube (3) of the triple lumen type which has a guide wire lumen (13) in addition to the aspiration lumen (11) and the core wire lumen (12), wherein the front end of the above-described front end side tube is obliquely cut and a terminal aspiration tube (4) of a flexible double lumen, which has a front end opening (41) inclined in almost the same direction as the cut face (31), is connected to the cut face.

主权项

1. A thrombus-aspiration catheter comprising:
a basal end-side tube; a front end-side tube connected to a front end side of the basal end-side tube; a terminal aspiration tube connected to a front end of said front end-side tube, wherein said terminal aspiration tube is more flexible than said front end-side tube, while the front end side of said front end-side tube and a basal end side of said terminal aspiration tube are so connected with each other that a hardness changes stepwisely, and wherein a front end of said front end-side tube and a basal end side of said terminal aspiration tube have complementary-shaped end surfaces so that both end surfaces are connected with each other, and at least part of the front end of said front end-side tube overlaps with at least part of the basal end side of said terminal aspiration tube in a direction orthogonal to a longitudinal direction of the thrombus-aspiration catheter; and a solid contrast marker member, wherein said terminal aspiration tube is a double lumen tube having an aspiration lumen and a guide wire lumen, said front end-side tube is a triple lumen tube having a guide wire lumen, an aspiration lumen and a core wire lumen, and said solid contrast marker member is inserted into the core wire lumen of the front end-side tube on the front end of the front end-side tube.