04611594 is referenced by 377 patents and cites 12 patents.

Several versions of instruments are disclosed which are useful for the containment of calculi to minimize injury to surrounding tissue during removal and/or destruction of such calculi. In each embodiment a suitable grasping device is utilized to locate and grasp a stone (calculus) in a body passage or organ, such grasping device being used in combination with a catheter having an expandable and contractable distal end portion capable of receiving and substantially enclosing the stone to protect the surrounding tissue from injury that might otherwise be produced by the rough edges of the stone as it is extracted, or to shield such tissue as the stone is fragmented in situ and then contain the fragments as they are removed.

Title
Medical instrument for containment and removal of calculi
Application Number
6/599020
Publication Number
4611594
Application Date
April 11, 1984
Publication Date
September 16, 1986
Inventor
Theodore V Benderev
Chicago
IL, US
John T Grayhack
La Grange
IL, US
Agent
Tilton Fallon Lungmus
Assignee
Northwestern University
IL, US
IPC
A61B 17/00
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