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Balloon catheter apparatus with releasable distal seal and method of operation

  • US 5,078,681 A
  • Filed: 10/23/1989
  • Issued: 01/07/1992
  • Est. Priority Date: 10/23/1989
  • Status: Expired due to Term
First Claim
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1. A combination of a body cavity insertion device and a balloon catheter apparatus,said body cavity insertion device comprising an insertion portion to be inserted in a body cavity through said balloon catheter apparatus, said insertion portion having a distal end portion;

  • andsaid balloon catheter apparatus comprising a catheter to be inserted in the body cavity, said catheter including an elongated tube defining a reception portion, in which said insertion portion is insertable, said tube including a balloon portion which is inflatable under pressure of liquid in said reception portion so as to seal the body cavity, a liquid flow path communicating said reception portion with said balloon portion, and a seal portion, which is connected to said balloon portion, and through which a distal end portion of said insertion portion is caused to protrude outward, said seal portion including means for normally sealing said liquid within the catheter and being opened by said liquid in said balloon portion after the body cavity is sealed by said balloon portion as pressure of said liquid exceeds a predetermined value so as to feed the pressurized liquid in said balloon portion, toward the distal end portion of said insertion portion.

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