Cervical dilator

Details Cervical dilator Cervical dilator

1979-11-28

1980-12-09

Rosenbaum, C. Fred

Surgery

Truss

Pad

128130, A61M 2900

Patent

active

042378931

ABSTRACT:
A self-powered cervical dilator is disclosed. The dilator comprises (1) an expandable housing positioned around (2) a swellable laminate, which laminate surrounds (3) a support member. The laminate comprises (a) a lamina formed of an absorbent material laminated to (b) a lamina formed of a swellable polymer facing the housing. In operation, when the dilator is in the cervical canal, fluid therefrom is imbibed by the laminate into the dilator causing the laminate to swell and apply pressure against and expand the housing, which housing correspondingly exerts force against the walls of the cervical canal thereby dilating the canal.

REFERENCES:
patent: 1887526 (1932-11-01), Spielberg
patent: 3722500 (1973-03-01), Wichterle
patent: 3760984 (1973-09-01), Theeuwes
patent: 3865108 (1975-02-01), Hartop
patent: 3971376 (1976-07-01), Wichterle
patent: 3971379 (1976-07-01), Chatterjee
patent: 3987790 (1976-10-01), Eckenhoff
patent: 3991760 (1976-11-01), Drobish et al.
patent: 3993551 (1976-11-01), Assarsson et al.
patent: 3995631 (1976-12-01), Higuchi et al.
patent: 4017653 (1977-04-01), Gross
patent: 4041948 (1977-08-01), Flam et al.
patent: 4061846 (1977-12-01), Gross et al.
patent: 4137922 (1979-02-01), Leininger et al.

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