Cervical dilation measurement instruments

Details Cervical dilation measurement instruments Cervical dilation measurement instruments

1977-01-05

1979-02-27

Howell, Kyle L.

Surgery

Truss

Perineal

33149J, 33174D, 128361, A61B 510

Patent

active

041413458

ABSTRACT:
Cervical dilation is measured by a V-shaped caliper instrument having connectors on the free ends of the caliper arms for securement to respectively opposed portions of the cervix, and a transducer coupled with the arms to provide an electric signal representing their mutually relative positions. The transducer suitably comprises strain gages mounted on a spring acting between the arms. The connectors can be toothed spring clips pivoted on the arms, but are preferably pins projecting generally parallel to the arms from the underfaces of outwardly turned free end portions thereof. In the latter case the arms preferably have spring guard strips extending alongside their outer faces at their ends.

REFERENCES:
patent: 2924220 (1960-02-01), Von Micsky
patent: 3273559 (1966-09-01), Evans
patent: 3420222 (1969-01-01), Noe et al.
patent: 3937212 (1976-02-01), Fletcher

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