BODY FLUID FLOW NON-INTERRUPTING TYPE BALLOON CATHETER

摘要

A balloon catheter provides pressure-contact to a wall of a lumen or a stent or a stent graft in the lumen without interrupting body fluid flow such as blood when the balloon is expanded in the lumen. The balloon catheter includes a single balloon arranged at a distal side of a catheter shaft, and three line-shaped portions extending outside the balloon over the entire length of the balloon along an axial direction of the catheter shaft at even intervals in a circumferential direction. The balloon is partially restricted from being expanded by the line-shaped portions and is expanded in a radial direction between the adjacent line-shaped portions to form three balloon expansion portions that are divided in the circumferential direction. Accordingly, gaps are formed between a lumen wall and outer circumferential faces of the balloon expansion portions so that blood or body fluid can be flown therethrough without being interrupted.

主权项

1. A body fluid non-interrupting type balloon catheter to be inserted into a lumen of a living body or a device in the lumen, comprising:
a catheter shaft; a single balloon arranged at a distal side of the catheter shaft; and a plurality of linear line-shaped portions extending outside the balloon over the entire length of the balloon along an axial direction of the catheter shaft as being arranged at predetermined intervals in a circumferential direction, wherein the balloon forms a plurality of balloon expansion portions as being expanded in a radial direction between the adjacent line-shaped portions and divided in the circumferential direction by the line-shaped portions, and the line-shaped portions restricts expansion of the balloon so that a gap having a size to be capable of flowing body fluid between a distal side and a base end side of the balloon is formed between the lumen or an inner wall of the device and the adjacent balloon expansion portion.