IP Library › Granted Patent US 12,691,251
Granted Patent B2
US 12,691,251 · App. 18/026,923 · Granted Jul 28, 2026

Guiding catheter

Inventor: Yasuhiro Okawa (Tokyo, JP)
Assignee: JAPAN LIFELINE CO., LTD.
A61M25/005A61M25/0032A61M25/0097A61M2025/0037A61M2025/1061A61M2025/1079
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 12,691,251
App. No.
18/026,923
Granted
Jul 28, 2026
Kind
B2
Abstract

A guiding catheter includes: a shaft that includes a main lumen and a sub-lumen; a balloon attached to a distal end portion of the shaft; a distal end tip connected to a distal end side of the shaft; and a hub connected to a proximal end side of the shaft. The shaft is formed by layering: an inner layer that forms the main lumen; a first reinforcing layer formed on the inner layer; an intermediate layer formed on the first reinforcing layer and enclosing the sub-lumen; a second reinforcing layer formed on the intermediate layer; and an outer layer formed on the second reinforcing layer from a proximal end to a distal end.

Claims (19)

1 . A guiding balloon catheter comprising:

a shaft that includes a main lumen and a sub-lumen;

a balloon that is attached to a distal end portion of the shaft and expands by supplying a fluid flowing through the sub-lumen to an inside of the balloon;

a distal end tip that is connected to a distal end side of the shaft and includes a lumen communicating with the main lumen and opening at a distal end of the distal end tip; and

a hub that is connected to a proximal end side of the shaft and includes ports communicating with the respective main lumen and sub-lumen, wherein

the shaft comprises an inner layer that forms the main lumen, a first reinforcing layer formed on the inner layer, an intermediate layer that is formed on the first reinforcing layer and encloses the sub-lumen, a second reinforcing layer formed on the intermediate layer, and an outer layer formed on the second reinforcing layer from a proximal end of the shaft to a distal end of the shaft;

both of the first reinforcing layer and the second reinforcing layer are braided layers formed of braided tubes that are continuous from the proximal end to the distal end of the shaft,

the shaft has a side hole extending from the sub-lumen in a radial direction of the shaft and communicating with an inside of the balloon, and

the second reinforcing layer extends more toward the distal end of the shaft than the side hole.

2 . The guiding catheter according to claim 1 , wherein

the main lumen is eccentric with respect to a central axis of the shaft, the sub-lumen is formed on a side opposite to a side where the main lumen is eccentric, and a cross-section of the sub-lumen is substantially a rectangle or a crescent.

3 . The guiding catheter according to claim 1 , wherein

the shaft has the distal end portion where shaping is performed in a bent or curved shape.

4 . The guiding catheter according to claim 3 , wherein

the shaping is performed such that the sub-lumen is located outside the bent or curved shape.

5 . The guiding catheter according to claim 1 , wherein

the distal end tip includes a proximal end portion having an outer diameter same as an outer diameter of the shaft and a distal end portion decreasing in diameter in a distal end direction, and a protrusion portion that is inserted into the sub-lumen of the shaft and occludes a distal end opening of the sub-lumen is formed at a proximal end of the distal end tip.

6 . The guiding catheter according to claim 5 , wherein

a ring-shaped contrast marker is inserted into and fitted to the lumen of the distal end tip at the proximal end portion.