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Expanding tip embolectomy catheter with indicator balloon

  • US 3,978,863 A
  • Filed: 02/18/1975
  • Issued: 09/07/1976
  • Est. Priority Date: 06/06/1974
  • Status: Expired due to Term
First Claim
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1. A biologically compatible expandable tip embolectomy catheter of the type constructed and adapted to be inserted in and advanced through blood passages, which is capable of being followed by X-ray techniques and which includes means to indicate to the user when the inserted expandable tip has been expanded in the body passage, comprising:

  • a flexible first tube;

    a resilient, expandable second tube adapted to engage the thrombus, attached in fluid communication with the first tube at the distal end thereof, the distal end of said second tube being sealed;

    a resilient, expandable third tube, which is more resilient to expansion than the second tube, attached in fluid communication with the first tube proximate to the proximal end of the first tube;

    means for limiting the expansion of said third tube;

    a flexible, X-ray opaque element extending through said tubes, the tip portion of the second tube being attached proximate the end of the opaque element; and

    means in fluid communication with the first tube for connecting the catheter to a fluid source, for applying fluid pressure into the catheter from a fluid source to expand the second tube outwardly into contact with the walls of the body passage in which it has been inserted first, then to expand the third tube outside the body until such expansion is empeded by said limiting means to indicate to the user that the expandable tip has been expanded inside the body, and then to expand the second tube further to press against the walls of the body passage.

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