MULTI-LUMEN BALLOON CATHETER

• US 3,746,003 A
• Filed: 09/23/1971
• Issued: 07/17/1973
• Est. Priority Date: 04/20/1970
• Status: Expired due to Term

• Current Assignee: Baxter International Inc.
• Original Assignee: Bruce D. Bett, Clement E. Lieber, Lawrence W. Blake
• Inventors: Blake, Lawrence W., Bett, Bruce D., Lieber, Clement E.
• Primary Examiner(s): Truluck, Dalton L.
• Application Number:
  US05/183,104
• Time in Patent Office: 663 Days
• Field of Search: 128/246,325,344,348,349B,349BV,350,351
• US Class Current: 604/102.02
• CPC Class Codes: A61M 2025/1065 having a balloon which is inversely attached to the shaft at the distal or proximal end
• CPC Class Codes: A61M 25/1034 Joining of shaft and balloon
• CPC Class Codes: Y10T 29/49865 by temperature differential [e.g., shrink fit]

Abstract

A multi-lumen tube is extruded from a thermoplastic material having a memory characteristic. An end portion of the tube is heated sufficiently to soften the plastic and permit the end portion to be drawn out to a reduced diameter. A pair of metal ferrules is placed on the reduced end portion in predetermined positions spaced a short distance apart. Then the reduced portion is heated in relaxed condition cuasing it to re-expand and lock the ferrules in place. Balloon inflation openings are formed communicating with one of the lumens. A sleeve of balloon material is secured by bindings over the ferrules. In one embodiment the tube is limp and the balloon is utilized as a sail to flow carry the catheter through a vein into and through the heart and into the pulmonary artery. This application is directed to the article resulting from the described method of manufacture.

Claims

1. A balloon catheter comprising a relatively soft plastic tube having a balloon inflation lumen therein, the wall of said tube having a balloon inflation opening therein communicating with said lumen, a rigid circumferential band indented in the outer surface of said tube on the distal side of said opening, a rigid circumferential band indented in the outer surface of said tube on the proximal side of said opening, an elastic sleeve balloon surrounding said tube and having end portions overlying said bands, and bindings securing said end portions of said balloon to said bands, said bands underlying and supporting said bindings on said soft tube and preventing collapse of said lumen.

2. A catheter as defined in claim 1 wherein said tube has a second lumen therein in side by side relation to said balloon inflation lumen.

3. A catheter as defined in claim 1, said bands having both inside and outside diameters less than the outside diameter of said tube.

4. A catheter as defined in claim 1, said balloon inflation opening comprising a longitudinal slit in said tube.

5. A catheter as defined in claim 1, wherein the distal end of said balloon is everted causing an annular bulging fold in the balloon to surround the distal end of said tube when the balloon is inflated.

6. A balloon catheter is comprising a plastic tube having a balloon inflation lumen therein, a pair of rigid ferrules indented in the outer surface of said tube in longitudinally spaced relation adjacent the distal end of said tube, an elastic sleeve balloon having opposite end portions overlying said ferrules, and bindings securing said balloon to said ferrules, the wall of said tube having a balloon inflation opening between said ferrules communicating with said lumen, and the distal end of said balloon being everted causing an annular bulging fold in the balloon to surround the distal end of said tube when the balloon is inflated.

7. A catheter as defined in claim 6, said tube being limp for use as a flow directed catheter in a blood vessel.

8. A catheter as defined in claim 6, saiD balloon inflation opening comprising a longitudinal slit in said tube.