Surgery – Truss – Perineal
Patent
1976-06-30
1978-01-03
Michell, Robert W.
Surgery
Truss
Perineal
128 2M, 128349B, 128DIG9, A61B 100
Patent
active
040660702
ABSTRACT:
Main and auxiliary cuffs made of an elastic material such as rubber, etc., are mounted in close proximity to each other on the forward end portion of a flexible sheath of a tubular medical instrument. The flexible sheath is inserted into a body cavity of a human being and with further insertion of the flexible tube the main cuff is contacted, while at the expanded state, with the wall surface of the body cavity and when the flexible sheath is forwardly pushed the portion of the main cuff is rearwardly deformed, while effecting a rolling contact with the wall surface of the body cavity, to permit it to ride on the auxiliary cuff. When the auxiliary cuff is then expanded to cause the corresponding wall surface of the body cavity to be expanded, the main cuff is separated away from the wall surface of the body cavity to cause the portion of the main cuff to be forwardly pushed ahead into an original position. Such a step is cyclically repeated so that the sheath can be intermittently advanced into the body cavity of the human being.
REFERENCES:
patent: 2855934 (1958-10-01), Daughaday, Jr.
patent: 3485237 (1969-12-01), Bedford
patent: 3665928 (1972-05-01), Del Guercio
patent: 3895637 (1975-07-01), Choy
Layton Henry S.
Michell Robert W.
Olympus Optical Co,. Ltd.
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