Extracting device for removing objects from human body passages

Details Extracting device for removing objects from human body passages Extracting device for removing objects from human body passages

1979-09-17

1981-01-06

Michell, Robert W.

Surgery

Truss

Pad

128349B, A61B 1700

Patent

active

042430402

ABSTRACT:
Useful for removing kidney stones, gall stones and other objects from human body passages, the extracting device comprises a thin tubular rubber sleeve having its proximal and distal ends connected to the distal ends of outer and inner flexible tubes insertable into the body passage. The sleeve is inflatable by fluid pressure, supplied along the clearance space between the tubes to dilate the passage. The distal end of the sleeve is turned inside out and, when the sleeve is inflated, forms a soft annular flaring convex portion bulging beyond the distal end of the inner tube for sealing engagement with the stone, which is captured by suction, applied through the inner tube. Then, the inner tube is retracted, so that the suction pulls the stone within the sleeve while progressively turning the sleeve inside out around the stone to envelop the stone, for removal with the tubes.

REFERENCES:
patent: 1292306 (1919-02-01), Beck
patent: 1612697 (1926-12-01), Cecil
patent: 1902418 (1933-03-01), Pilgrim
patent: 2845930 (1958-08-01), Brown
patent: 3050066 (1962-08-01), Koehn
patent: 3053257 (1962-09-01), Birtwell
patent: 3112748 (1963-12-01), Colburn
patent: 3433214 (1969-03-01), Silverman
patent: 3827437 (1974-08-01), Inaba
patent: 3866599 (1975-02-01), Johnson
patent: 4024873 (1977-05-01), Antoshiw et al.
patent: 4072146 (1978-02-01), Howes

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