Stone extractor and method

Details Stone extractor and method Stone extractor and method

1991-07-17

1993-01-05

Pellegrino, Stephen C.

Surgery

Instruments

Means for concretion removal

606 1, 606127, 606170, 606171, 606185, A61B 1700

Patent

active

051766884

ABSTRACT:
Instrument and method for removing stones (calculi) from the kidneys, the bladder and other parts of the body. A stone is captured in a basket at the distal end of an elongated tubular member and broken into pieces while it is held by the basket. The stone is broken up by a hammering action provided by a reciprocating shaft which extends through the tubular member into the basket and is driven toward the stone by a spring. The stone is removed from the body by withdrawing the tubular member from the body with the pieces of the stone in the basket. Since the tip of the shaft impacts upon the stone inside the basket, the instrument is safe in that the reciprocate tip cannot strike the tissue outside the basket.

REFERENCES:
patent: 2227727 (1941-01-01), Leggiadro
patent: 2943626 (1960-07-01), Dormia
patent: 3008467 (1961-11-01), Morris
patent: 4046149 (1977-09-01), Komiya
patent: 4198960 (1980-04-01), Utsigi
patent: 4203429 (1980-05-01), Vasilevsky et al.
patent: 4227532 (1980-10-01), Bluhm et al.
patent: 4557255 (1985-12-01), Goodman
patent: 4611594 (1986-09-01), Grayback et al.
patent: 4936845 (1990-06-01), Stevens
patent: 5036860 (1991-08-01), Leigh et al.

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