Surgery – Instruments – Obstetric or gynecological instruments
Patent
1990-11-28
1992-08-18
Aschenbrenner, Peter A.
Surgery
Instruments
Obstetric or gynecological instruments
606208, 606121, G01N 348
Patent
active
051395037
ABSTRACT:
A pair of obstetrical spatulas especially useful during the second stage or expulsion stage of labor during childbirth to assist in helping the fetal head to exit from the pelvic outlet by closely simulating the normal movements of the fetal head in the birth canal. Each spatula includes a blade provided with cephalic curve configuration to conform with and engage the fetal head with the blades including a shank or pedicule which form an angle of approximately 35.degree. with the longitudinal axis of the blades to provide a perineal curve. The pedicules are connected to a semicircular segment by a hinge at each end of the semicircular segment to enable articulate movement of the pedicules and blades in directions toward and away from each other and in longitudinal or axial directions. One of the hinge connections between the pedicule and semicircular segment is separable to enable more effective and accurate positioning of the blades in relation to the fetal head and pelvic outlet by individually positioning the blades after which the hinge is connected. A traction bar and handle with a force indicator is connected to the semicircular segment to control and indicate the traction force exerted on the spatulas.
REFERENCES:
patent: 399749 (1889-03-01), Galiano
patent: 820845 (1906-05-01), Barton
patent: 930886 (1909-08-01), Robertson
patent: 1048728 (1912-12-01), Norden
patent: 1619299 (1927-03-01), Hylarides
patent: 2639712 (1953-05-01), Miseo
patent: 3088465 (1963-05-01), Smith
patent: 3605748 (1971-09-01), Salinas-Benavides
patent: 3785381 (1974-01-01), Lower et al.
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