Balloon Catheter

• US 20070203453A1
• Filed: 03/29/2005
• Published: 08/30/2007
• Est. Priority Date: 03/31/2004
• Status: Abandoned Application

• Current Assignee: ZEON Corporation
• Original Assignee: ZEON Corporation
• Inventors: Mori, Kenji, Iida, Takahiro
• Application Number:
  US10/594,919
• Publication Number:
  US 20070203453A1
• Time in Patent Office: Days
• US Class Current: 604/96.10
• CPC Class Codes: A61M 2025/0034 characterized by elements which are assembled, connected or fused, e.g. splittable tubes, outer sheaths creating lumina or separate cores making of catheters A61M25/0009
• CPC Class Codes: A61M 25/0032 characterized by at least one unconventionally shaped lumen, e.g. polygons, ellipsoids, wedges or shapes comprising concave and convex parts
• 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 60/139 inside the aorta, e.g. intra-aortic balloon pumps
• CPC Class Codes: A61M 60/274 the inlet and outlet being the same, e.g. para-aortic counter-pulsation blood pumps
• CPC Class Codes: A61M 60/295 Balloon pumps for circulatory assistance
• CPC Class Codes: A61M 60/497 for balloon pumps for circulatory assistance
• CPC Class Codes: A61M 60/531 using blood pressure data, e.g. from blood pressure sensors
• CPC Class Codes: A61M 60/843 Balloon aspects, e.g. shapes or materials
• CPC Class Codes: A61M 60/865 Devices for guiding or inserting pumps or pumping devices into the patient's body

Abstract

An intra-aortic balloon catheter 20 having a balloon part 22 inserted inside the aorta and inflating and deflating to assist heart functions, an outer tube 24 connected to the proximal end of the balloon part 22 to introduce and guide out pressurized fluid inside the balloon part 22, and an inner tube 30 to which the distal end of the balloon part 22 is connected and extending through the insides of the balloon part 22 and outer tube 24 in the axial direction. The inner tube 30 is fused or adhered to the inside wall of the outer tube 24 over a length of 50% or greater of the total length L1 from the distal end of the outer tube 24. The inner tube 30 is engaged with the inside wall of the outer tube 24 by a cut piece 54 at the distal end of the outer tube 24.

Claims

1. An intra-aortic balloon catheter comprising;

a balloon part inserted inside the aorta and inflating and deflating to assist the heart function,

an outer tube with a distal end connected to a proximal end of said balloon part to introduce and guide out pressurized fluid inside of said balloon part, and

an inner tube to which a distal end of said balloon part is connected and extending through the insides of said balloon part and said outer tube in the axial direction, wherein

said inner tube is fused or adhered with the inside wall of said outer tube over a length of 50% or greater of the total length from the distal end of the outer tube, and

an engagement means engages said inner tube with the inside wall of said outer tube at the distal end of said outer tube.

2. The intra-aortic balloon catheter as set forth in claim 1, wherein

the distal end of said outer tube is formed with a cut that extends in the circumferential direction of said outer tube at a predetermined distance away from the distal end opening face of said outer tube toward the proximal end,

an engagement hole enabling insertion of said inner tube is formed by part of the wall of said outer tube positioned in the distance from said cut to said distal end opening face, constituting a cut piece, being pushed in toward the inside of said outer tube, and

said inner tube is inserted in said engagement hole for engagement with the inside wall of said outer tube.

3. The intra-aortic balloon catheter as set forth in claim 2, wherein the distal end opening face of said outer tube forms an acute angle with a longitudinal axis of said outer tube.

4. The intra-aortic balloon catheter as set forth in claim 3, wherein said engagement hole is formed with said cut piece positioned so that it protrudes from a distal end opening face of said outer tube to the distal end side.

5. The intra-aortic balloon catheter as set forth in claim 1, wherein the outside diameter of said inner tube positioned at the distal end side from said engagement means is larger than the outside diameter of said inner tube positioned at the proximal end side from said engagement means.

6. A balloon catheter comprising;

a balloon part able to be inflated and deflated,

an outer tube with a distal end connected to a proximal end of said balloon part so as to introduce and guide out pressurized fluid inside of said balloon part, and

an inner tube to which a distal end of said balloon part is connected extending along the insides of said balloon part and outer tube in the axial direction, wherein

the distal end of said outer tube is formed with a cut that extends in the circumferential direction of said outer tube at a predetermined distance away from the distal end opening face of said outer tube toward the proximal end,

an engagement hole enabling insertion of said inner tube is formed by part of the wall of said outer tube positioned in the distance from said cut to said distal end opening face, constituting a cut piece, being pushed in toward the inside of said outer tube, and

said inner tube is inserted in said engagement hole for engagement with the inside wall of said outer tube.

7. The balloon catheter as set forth in claim 6, wherein the distal end opening face of said outer tube forms an acute angle with a longitudinal axis of said outer tube.

8. The balloon catheter as set forth in claim 7, wherein said engagement hole is formed with said cut piece positioned so that it protrudes from a distal end opening face of said outer tube to the distal end side.

9. The balloon catheter as set forth in claim 6, wherein the outside diameter of said inner tube positioned at the distal end side from said engagement means is larger than the outside diameter of said inner tube positioned at the proximal end side from said engagement means.

10. The balloon catheter as set forth in claim 6, used for the intra-aortic balloon pumping method.