Catheter with balloon

• US 20020193820A1
• Filed: 06/24/2002
• Published: 12/19/2002
• Est. Priority Date: 12/24/1999
• Status: Active Grant

• Current Assignee: Toray Industries Incorporated
• Original Assignee: Toray Industries Incorporated
• Inventors: Wakuda, Hiroshi, Shimagami, Masato, Yamazaki, Yoshiharu
• Granted Patent: US 7,052,507 B2
• Time in Patent Office: Days
• US Class Current: 606/194
• CPC Class Codes: A61M 2025/0004 having two or more concentrically arranged tubes for forming a concentric catheter system
• CPC Class Codes: A61M 2025/0079 Separate user-activated means, e.g. guidewires, guide tubes, balloon catheters or sheaths, for sealing off an orifice, e.g. a lumen or side holes, of a catheter
• CPC Class Codes: A61M 2025/1013 with concentrically mounted balloons, e.g. being independently inflatable
• CPC Class Codes: A61M 25/10 Balloon catheters A61M25/0125 takes precedence; embolectomy A61B17/22032; retractors A61B17/02; inflatable balloons for placing stents or stent-grafts A61F2/958 ; stomach balloons for treatment of obesity A61F5/0003; oesophagal tubes A61J15/00
• CPC Class Codes: A61M 25/1002 characterised by balloon shape A61M25/1006, A61M25/1009 take precedence
• CPC Class Codes: A61M 25/1006 Balloons formed between concentric tubes

Abstract

The present invention relates to a catheter with a balloon, comprising a double tube consisting of an inner tube and an outer tube disposed concentrically and a balloon fastened at one end to the inner tube and at the other end to the outer tube, and further satisfying the following requirement (A) or (B):

(A) Without any air-extracting tube provided between the outer tube and the inner tube, the outer diameter of the outer tube is 4 mm or less, and the average bending moment of the outer tube at 40 cm or less from the tip of the tube at a bending angle of 45 degrees is in a range of 70 to 250 g·cm.

(B) The inner diameter d3 of a balloon-extending pipe stopper provided at the tip of the inner tube is in such a range that the inner diameter d3 is not substantially different in level from the inner diameter d4 of a balloon-extending pipe that is inserted into the inner tube and brought into contact with the balloon-extending pipe stopper for axial extension and radial contraction of the balloon.

The present invention can reduce the tube diameter of a catheter with a balloon, can reduce the number of necessary parts, can improve the manipulation convenience when the tip of the catheter with a balloon is inserted into an incision of a blood vessel, and can improve the manipulation convenience for moving the catheter in a blood vessel.

Claims

1. A catheter with a balloon, comprising a double tube consisting of an inner tube and an outer tube disposed concentrically and a balloon fastened at one end to the inner tube and at the other end to the outer tube, and further satisfying the following requirement (A) or (B):

(A) Without any air-extracting tube provided between the outer tube and the inner tube, the outer diameter of the outer tube is 4 mm or less, and the average bending moment of the outer tube at 40 cm or less from the tip of the tube at a bending angle of 45 degrees is in a range of 70 to 250 g·

cm.

(B) The inner diameter d3 of a balloon-extending pipe stopper provided at the tip of the inner tube is in such a range that the inner diameter d3 is not substantially different in level from the inner diameter d4 of a balloon-extending pipe that is inserted into the inner tube and brought into contact with the balloon-extending pipe stopper for axial extension and radial contraction of the balloon.

2. A catheter with a balloon according to claim 1, which satisfies the requirement (B).

3. A catheter with a balloon according to claim 2, wherein the range in which the inner diameter d3 of the balloon-extending pipe stopper is not substantially different in level from the inner diameter d4 of the balloon-extending pipe is in a is in a range of +0.2 mm of the inner diameter of the balloon-extending pipe.

4. A catheter with a balloon according to claim 1, which satisfies the requirement (A).

5. A catheter with a balloon according to claim 4, wherein the outer tube is made of a synthetic resin, and a plasticizer content of the synthetic resin is 28 parts to 45 parts.

6. A catheter with a balloon according to claim 1, which satisfies the requirements (A) and (B).

7. A catheter with a balloon according to claim 1, wherein the balloon is a double balloon consisting of an inner balloon inflated by means of an introduced fluid and an outer balloon for receiving, on the outside, the inner balloon inflated with the introduced fluid.

8. A catheter with a balloon according to claim 1, wherein the balloon is reinforced by a fabric containing sheath-core yarns each consisting of an elastic filament for the core and a non-elastic filament for the sheath with a longer free length than the elastic filament for the core.

9. A catheter with a balloon according to claim 1, wherein the length of the extended balloon between the bound portions is 57 to 65 mm.

10. A catheter with a balloon according to claim 1, wherein three to eight ribs are provided inside the tip at the tip end of the balloon, and the inner diameter of the disposed ribs is within the maximum outer diameter of the balloon-extending pipe stopper +0.3 mm.

11. A catheter with a balloon according to claim 1, wherein the length of the manipulating hub of an inner tube-sliding needle is 3.6 mm to 10 mm.

12. A catheter with a balloon according to claim 1, wherein the outer diameter of the outer tube is 4 mm or less.