Surgery – Instruments – Obstetric or gynecological instruments
Patent
1991-08-09
1992-11-17
Aschenbrenner, Peter A.
Surgery
Instruments
Obstetric or gynecological instruments
604 74, A61B 1742
Patent
active
051639440
ABSTRACT:
There is disclosed herein a vacuum extractor for use in childbirth and comprising a bell shaped cup having a relatively thin outer flared edge, a hollow stem extending from the cup, and the stem including a handle. A vacuum source can be connected to the stem to draw a vacuum within the cup. A liner is hooked over the flared edge of the cup and provides a relatively large soft and resilient bead for the outer edge of the vacuum extractor which contacts maternal and fetal tissue. The liner is stretched into and secured within the cup and includes an aperture for allowing a vacuum to be drawn within the cup.
REFERENCES:
patent: 667447 (1901-02-01), Miller
patent: 897289 (1908-09-01), Howell
patent: 2542505 (1951-02-01), Gasciogne
patent: 3202152 (1965-08-01), Wood et al.
patent: 4730617 (1988-03-01), King
patent: 4799922 (1989-01-01), Beer et al.
patent: 5019086 (1991-05-01), Neward
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