Patent ID: 11904115
Assignee: TERUMO KABUSHIKI KAISHA
Field: Medical technology (Instruments)
Classification: CPC A  B | IPC A

Claim 0:
1. A catheter assembly comprising:
a catheter; and
a rigid inner needle inserted through the catheter;
wherein the catheter comprises:
a catheter body; and
a flexible portion that is located at a distal portion of the catheter body and forms a most distal portion of the catheter, wherein the flexible portion comprises:
a straight portion that has an outer diameter that is constant along an axial direction of the catheter, and
a tapered portion that extends from the straight portion in a distal direction, and that has an outer diameter that decreases in the distal direction;

wherein an elastic modulus of the catheter body is greater than an elastic modulus of the flexible portion;
wherein the catheter has a mixed region in which the catheter body and the flexible portion overlap each other in a radial direction;
wherein the flexible portion is formed of a material chosen from a group consisting of natural rubber, butyl rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, silicone rubber, polyurethane, polyester, polyamide, olefin, or styrene; and
wherein in a region distal of the catheter body, an inner peripheral surface of the flexible portion and the mixed region is in direct contact with an outer peripheral surface of the inner needle in a liquid-tight manner over an entire periphery of the inner needle.