Endoscopic lithotripsy system
First Claim
Patent Images
1. A lithotripsy device comprising:
- (a) an elongated, stone impacting member having a distal end for engaging a calculus and a proximal end;
(b) hammer means for repetitively applying an impact force to said stone impacting member, said hammer means including a chamber having a hammer member rotatably mounted therein and rotatable between a first ready position displaced from said proximal end of said stone impacting member and a second position in contact with said proximal end of said stone impacting member;
(c) means for driving said hammer member from said first ready position forcefully against said stone impacting member in said second position to drive said distal end of said stone impacting member against said calculus; and
(d) means for returning said hammer member to said first ready position.
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Abstract
An endoscopic lithotriptor including an elongated, flexible stone impacting member in the form of a wire whose distal end is brought against a stone to be broken and whose proximal end is adapted to be periodically struck by a hammer element. The hammer element is pneumatically driven by a linear jet of air causing it to swing through an arc about a pivot to impact an anvil affixed to the wire and oriented tangentially to the arc swept out by the hammer. The pneumatic chamber structure in which the hammer is pivotally mounted is designed to maximize the angular velocity reached by the hammer before impacting the anvil.
100 Citations
19 Claims
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1. A lithotripsy device comprising:
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(a) an elongated, stone impacting member having a distal end for engaging a calculus and a proximal end; (b) hammer means for repetitively applying an impact force to said stone impacting member, said hammer means including a chamber having a hammer member rotatably mounted therein and rotatable between a first ready position displaced from said proximal end of said stone impacting member and a second position in contact with said proximal end of said stone impacting member; (c) means for driving said hammer member from said first ready position forcefully against said stone impacting member in said second position to drive said distal end of said stone impacting member against said calculus; and (d) means for returning said hammer member to said first ready position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification