Catheter

Patent metadata

Field	Value
Publication number	US-11247023-B2
Application number	US-201615361179-A
Country	US
Kind code	B2
Filing date	Nov 25, 2016
Priority date	Nov 26, 2015
Publication date	Feb 15, 2022
Grant date	Feb 15, 2022

Abstract

A catheter includes: a catheter shaft; and a hub on a proximal side of the catheter shaft. The catheter shaft includes a shaft inner surface inclined portion at a proximal portion, the diameter of which increases proximally such that the shaft inner surface inclined portion forms an angle with the catheter central axis. The hub includes a first hub inner surface inclined portion continuous from the shaft inner surface inclined portion and inclined at the same inclination angle as the shaft inner surface inclined portion, and a second hub inner surface inclined portion proximal of the first hub inner surface inclined portion. The second hub inner surface inclined portion inclination angle differs from the first hub inner surface inclined portion inclination angle. The hub does not cover an inner peripheral surface of the catheter shaft in an interlock portion in which the catheter shaft and the hub are interlocked together.

First claim

What is claimed is:

1. A catheter comprising:
a catheter shaft in which a lumen is formed, the catheter shaft including a proximal portion;
a hub in which a hub lumen communicating with the lumen of the catheter shaft is formed, the lumen of the catheter shaft defining an inner peripheral surface of the catheter shaft, the hub being provided on a proximal portion of the catheter shaft;
the catheter shaft including a shaft inner surface inclined portion which is formed on an inner peripheral surface of the proximal portion of the catheter shaft, the shaft inner surface inclined portion possessing a first inner diameter increasing toward a proximal direction such that the shaft inner surface inclined portion forms an inclination angle with respect to a central axis of the catheter that is greater than an inclination angle of a portion of the inner peripheral surface of the catheter shaft other than the shaft inner surface inclined portion and is equal to or less than 13 degrees;
the hub including a first hub inner surface inclined portion that is continuous from the shaft inner surface inclined portion and that is inclined at an inclination angle with respect to the central axis of the catheter that is the same as the inclination angle of the shaft inner surface inclined portion;
the shaft inner surface inclined portion on the inner peripheral surface of the proximal portion of the catheter shaft extending continuously and smoothly from the first hub inner surface inclined portion of the hub in a non-stepwise manner;
the hub also including a second hub inner surface inclined portion on a proximal side of the first hub inner surface inclined portion, the second hub inner surface inclined portion possessing a second inner diameter which increases toward the proximal direction such that the second hub inner surface inclined portion forms an inclination angle with respect to the central axis of the catheter that is smaller than the inclination angle of the first hub inner surface inclined portion;
the hub not covering the inner peripheral surface of the proximal portion of the catheter shaft in an interlock portion in which the catheter shaft and the hub are interlocked together; and
the catheter shaft, including the proximal portion, being comprised of an inner layer; an outer layer that is disposed on an outer peripheral surface side of the inner layer; and reinforcement filaments which are disposed between an outer peripheral surface of the inner layer and an inner peripheral surface of the outer layer, wherein at least a portion of the reinforcement filaments protrudes proximally beyond the inner layer and the outer layer, and is embedded in the hub.

2. The catheter according to claim 1 , wherein the catheter shaft is formed of a material containing polytetrafluoroethylene.

3. The catheter according to claim 1 , wherein an axial length of a portion of the catheter shaft, in which the shaft inner surface inclined portion is formed, is greater than or equal to 0.5 mm and less than or equal to 3.0 mm.

4. The catheter according to claim 1 , wherein an inner peripheral surface of the inner layer is the inner peripheral surface of the catheter shaft.

5. The catheter according to claim 1 , further comprising an anti-kink protector fixed to a distal end portion of the hub and axially overlying a portion of the catheter shaft.

6. A catheter comprising:
a catheter shaft possessing a proximal end portion, and an axially extending catheter shaft lumen passing through the catheter shaft, the catheter shaft lumen being surrounded by an inner peripheral surface of the catheter shaft;
a hub fixed to the proximal end portion of the catheter shaft so that a distal end portion of the hub axially overlaps the proximal end portion of the catheter shaft in an overlap region, and a hub lumen inside the hub, the hub lumen possessing an inner peripheral surface surrounding the hub lumen, the hub communicating with the catheter shaft lumen;
a proximal-most end portion of the inner peripheral surface of the catheter shaft including a first inclined portion possessing a first catheter shaft inner diameter gradually increasing at an inclination angle in a proximal direction that is greater than an inclination angle of a portion of the inner peripheral surface of the catheter shaft other than the first inclined portion and is equal to or less than 13 degrees;
the inner peripheral surface of the hub including a first inclined portion possessing a first hub inner diameter gradually increasing at an inclination angle in the proximal direction, the inclination angle of the first inclined portion of the inner peripheral surface of the hub being the same as the inclination angle of the first inclined portion of the inner peripheral surface of the catheter shaft;
a proximal-most end of the first inclined portion of the inner peripheral surface of the catheter shaft and a distal-most end of the first inclined portion of the inner peripheral surface of the hub immediately adjoining one another;
the proximal-most end of the first inclined portion of the inner peripheral surface of the catheter shaft extending continuously and smoothly from the distal-most end of the first inclined portion of the inner peripheral surface of the hub in a non-stepwise manner;
the inner peripheral surface of the hub including a second inclined portion possessing a second hub inner diameter gradually increasing at an inclination angle in the proximal direction, the inclination angle of the first inclined portion of the inner peripheral surface of the hub being greater than the inclination angle of the second inclined portion of the inner peripheral surface of the hub;
the second inclined portion of the inner peripheral surface of the hub being positioned proximally of the first inclined portion of the inner peripheral surface of the hub;
the hub being made of a material that does not cover the inner peripheral surface of the catheter shaft in the overlap region; and
the catheter shaft, including the proximal end portion, being comprised of an inner layer; an outer layer disposed on an outer peripheral surface side of the inner layer; and a reinforcement filament disposed between an outer peripheral surface of the inner layer and an inner peripheral surface of the outer layer, wherein at least a portion of the reinforcement filament protrudes proximally beyond the inner layer and the outer layer, and is embedded in the hub.

7. The catheter according to claim 6 , wherein the catheter shaft is formed of a material containing polytetrafluoroethylene.

8. The catheter according to claim 6 , wherein an axial length of the first inclined portion of the inner peripheral surface of the catheter shaft is greater than or equal to 0.5 mm and less than or equal to 3.0 mm.

9. The catheter according to claim 6 , further comprising an anti-kink protector fixed to a distal end portion of the hub and axially overlying a portion of the catheter shaft.

10. The catheter according to claim 6 , wherein an inner peripheral surface of the inner layer is the inner peripheral surface of the catheter shaft.

Assignees

• Terumo Corp

Inventors

• Takemura Tomoaki
• Otake Yuya

Classifications

• A61F2/95

  Instruments specially adapted for placement or removal of stents or stent-grafts · CPC title

• B29K2995/0073

  smooth · CPC title

• A61M25/0045

  multi-layered, e.g. coated (coating materials A61L29/08) · CPC title

• B29L2031/7534

  Cardiovascular protheses · CPC title

• A61M25/0097 Primary

  characterised by the hub (connectors A61M39/10) · CPC title