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Medical retrieval device with releasable retrieval basket

  • US 6,348,056 B1
  • Filed: 08/06/1999
  • Issued: 02/19/2002
  • Est. Priority Date: 08/06/1999
  • Status: Expired due to Term
First Claim
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1. A medical instrument comprising:

  • a proximal handle;

    a sheath including a proximal portion and a distal end, the proximal portion of the sheath coupled to the handle; and

    a retrieval assembly comprising a plurality of legs, at least one of said legs comprising a bulbous proximal portion formed in a proximal portion of said at least one of said plurality of legs, and comprising a proximal end, a distal end, and an intermediate section, said plurality of legs being closer together at said distal end of said bulbous proximal portion than in said intermediate section of said bulbous proximal portion, and a bulbous distal portion formed in a distal portion of said at least one of said plurality of legs, and comprising a proximal end, a distal end, and an intermediate section, said plurality of legs being closer together at said proximal end of said bulbous distal portion than in said intermediate section of said bulbous distal portion, wherein said bulbous distal portion formed in said distal portion of said at least one of said plurality of legs of said retrieval assembly captures material in a body when said bulbous distal portion of said retrieval assembly extends from said distal end of said sheath and said bulbous proximal portion of said retrieval assembly is collapsed within said sheath, said retrieval assembly expanding to release captured material when said distal and proximal portions of said retrieval assembly extend from said distal end of said sheath.

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