Speculum

Details Speculum Speculum

1997-07-28

1998-08-18

Thaler, Michael H.

Surgery

Specula

Retractor

606193, 606198, A61M 2902

Patent

active

057952892

ABSTRACT:
A speculum is comprised of a shaft member having a cavity passing therethrough and an outer layer and an inner layer with a bladder, capable of holding a bio-acceptable liquid, disposed therebetween. At least one guide member runs along the lateral length of the shaft member within the cavity. An end cap is attached to one end of the shaft member and an expansion cap is rotatably received within the end cap. A coil spring has one end attached to one of the at least one guide members proximate the distal end of the shaft member and the opposing end attached to the expansion cap. Rotation of the expansion cap into the end cap causes lateral length reduction of the spring which increases coil diameter and thus shaft member diameter and thereby increases the lumen of the device. Counter-rotation of the expansion cap out of the end cap causes coil turn and shaft member diameter reduction.

REFERENCES:
patent: 2548602 (1951-04-01), Greenburg
patent: 3044461 (1962-07-01), Murdock
patent: 3774596 (1973-11-01), Cook
patent: 4899729 (1990-02-01), Gill et al.
patent: 5197971 (1993-03-01), Bonutti
patent: 5316023 (1994-05-01), Palmaz et al.
patent: 5328469 (1994-07-01), Coletti
patent: 5460170 (1995-10-01), Hammerslag
patent: 5484499 (1996-01-01), Amundson et al.
patent: 5674240 (1997-10-01), Bonutti et al.

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