Tubular medical instrument having a flexible sheath driven by a

Details Tubular medical instrument having a flexible sheath driven by a Tubular medical instrument having a flexible sheath driven by a

1976-12-22

1979-04-10

Michell, Robert W.

Surgery

Truss

Perineal

128 2M, 128DIG9, 128349B, A61B 100

Patent

active

041483073

ABSTRACT:
A tubular medical instrument has at least one cuff assembly including two cuffs disposed on the circumference of a flexible sheath, spaced at prescribed intervals and made expansible only in a radial direction of the flexible sheath and a deformable propellant cuff having a doubled-back section, disposed also on the circumference of the sheath between the two cuffs. When air is introduced into, or drawn from, the three cuffs selectively, the flexible sheath automatically advances step by step in the human body cavity.

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

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