Catheter with a balloon reinforced with composite yarn

• US 5,330,429 A
• Filed: 01/08/1993
• Issued: 07/19/1994
• Est. Priority Date: 05/09/1989
• Status: Expired due to Term

• Current Assignee: Toray Industries Incorporated
• Original Assignee: Toray Industries Incorporated
• Inventors: Yamazaki, Yoshiharu, Futami, Yasuhiko, Noguchi, Noriyasu, Hagio, Mitsuyuki
• Primary Examiner(s): Yasko, John D.
• Assistant Examiner(s): CERMAK, ADAM
• Application Number:
  US08/002,422
• Time in Patent Office: 557 Days
• Field of Search: 604/96-103, 604/282, 606/192-196, 600/18
• US Class Current: 604/103.12
• CPC Class Codes: A61M 2025/1084 having features for increasing the shape stability, the reproducibility or for limiting expansion, e.g. containments, wrapped around fibres, yarns or strands
• CPC Class Codes: A61M 25/1027 Making of balloon catheters
• CPC Class Codes: A61M 25/1029 Production methods of the balloon members, e.g. blow-moulding, extruding, deposition or by wrapping a plurality of layers of balloon material around a mandril
• CPC Class Codes: A61M 25/1034 Joining of shaft and balloon

Abstract

A catheter with a balloon characterized by a balloon reinforced with a composite yarn consisting of an elastic yarn and a non-elastic yarn with a larger free length of the non-elastic yarn than that of said elastic yarn. When the catheter is inserted into a blood vessel or taken out on a surgical operation, the balloon is deflated to a small diameter without producing any wrinkle and is stretched by inflation to the same size and the same shape at any time. Therefore, reliability of the balloon catheter in surgical operation is improved and the cut wound in the surgical operation is smaller. Treatment and management after the surgical operation are simple and the time required for recovery is extremely short.

Claims

1. A balloon for use in a balloon catheter, comprising:

an outer elastic film;

a reinforcing fabric, comprising a composite yarn consisting of an elastic yarn and a non-elastic yarn having a larger free length than that of said elastic yarn; and

an inner elastic film,

wherein the reinforcing fabric and the inner elastic film are not adhered with each other, and

wherein the reinforcing fabric is adhered with the outer elastic film.

2. A balloon as recited in claim 1, wherein the reinforcing fabric consists of a knitted fabric.

3. A balloon as recited in claim 1, wherein the reinforcing fabric consists of a woven fabric.

4. A balloon as recited in claim 1, the catheter further comprising a double tube having an inner and an outer tube concentrically slidable with each other, wherein one end of the balloon is fixed on the inner tube of said double tube and another and thereof is fixed on the outer tube.

5. A balloon as recited in claim 4, the catheter further comprising a shaft insertable in said inner tube and a stopper for said shaft on the apex of said inner tube.

6. A balloon for use in a balloon catheter, comprising:

an outer elastic film;

a reinforcing fabric; and

an inner elastic film,

wherein the reinforcing fabric and the inner elastic film are not adhered with each other,

wherein said reinforcing fabric comprises a composite yarn consisting of an elastic yarn and a non-elastic yarn having a larger free length than that of said elastic yarn, and

wherein the ratio of free length of said elastic yarn to said non-elastic yarn is 0.15;

to 0.5

7. A balloon for use in a balloon catheter, comprising:

an outer elastic film;

a reinforcing fabric; and

an inner elastic film,

wherein the reinforcing fabric and the inner elastic film are not adhered with each other, and

wherein said composite yarn consists of a core-sheath yarn in which the core comprises an elastic yarn and the sheath comprises a non-elastic yarn.

8. A balloon as recited in claim 7, wherein the non-elastic yarn is spirally wound on the elastic yarn.

9. A balloon as recited in claim 7, wherein the non-elastic yarn consists of a false-twisted textured yarn.

10. A balloon for use in a balloon catheter, comprising:

an outer elastic film;

a reinforcing fabric; and

an inner elastic film,

wherein the reinforcing fabric and the inner elastic film are not adhered with each other, and

wherein the inner elastic film and the reinforcing fabric are separated by a coating of lubricant.