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Intra-aortic balloon catheter

  • US 5,711,754 A
  • Filed: 01/19/1996
  • Issued: 01/27/1998
  • Est. Priority Date: 06/27/1991
  • Status: Expired due to Fees
First Claim
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1. An intra-aortic balloon catheter comprising:

  • a balloon portion which is inserted into an aorta and which repeatedly expands and contracts so as to assist pumping action of the heart;

    a catheter tube connected at one end to an end of the balloon portion, the catheter tube having a first lumen introducing a pressurized gas into and leading the pressurized gas out from said balloon portion, the catheter tube having a branch portion at an end thereof opposite to the end having the balloon portion; and

    an inner tube having a second lumen which communicates to a blood introduction port provided at the tip of said balloon portion and extends through said balloon portion and catheter tube in the axial direction, the catheter tube being empty except for the inner tube provided therein such that the inner tube is the only structure provided within the catheter tube, and the inner tube being empty,the inner diameter and the thickness of said catheter tube being respectively from 1.5 to 4.0 mm and from 0.05 to 0.4 mm, the inner diameter and the thickness of said inner tube being respectively from 0.1 to 1.0 mm and from 0.05 to 0.4 mm,the first lumen of said catheter tube having a larger cross-sectional area than that of the second lumen,said inner tube being generally concentrically positioned within said balloon portion and being continuously affixed to the inside wall of said catheter tube from the end of the balloon portion to the branch portion of the catheter tube.

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