Stapling instrument having an anvil-carrying part of particular

Details Stapling instrument having an anvil-carrying part of particular Stapling instrument having an anvil-carrying part of particular

1980-04-10

1981-12-08

Michell, Robert W.

Surgery

Truss

Pad

128305, 128334R, 227 19, 227DIG1, A61F 1732, A61B 1712, A61B 1704, B31B 100

Patent

active

043042368

ABSTRACT:
Apparatus for circular surgical stapling of hollow organs comprising an instrument and disposable cartridge assembly. The instrument comprises a housing with a throughbore in which a tube that is received for reciprocation by means of a manually operable squeeze handle. A rod reciprocates within the tube by means of a wing nut cooperating with a threaded part of the rod. A two-part disposable cartridge assembly comprised of an anvil-carrying part and a staple-carrying part are detachably mounted on the rod and housing, respectively. Keys are provided to hold the anvil-carrying part and the staple-carrying part in rotational orientation relative to the rod. Mutually coacting stops on the tube and rod determine the extent of reciprocation which is variable in dependence upon the position of the rod which, in turn, is dependent upon the juxtaposition of the anvil-carrying part with the staple-carrying part when the apparatus is closed on tissue preparatory to effecting a circular anastomoses. A novel geometric configuration for the anvil-carrying part is provided for easy removal of the instrument from a stapled anastomosis. Further, the interior of the stapling mechanism is generously vented to prevent the build up of excessive pressure in tissue confined within the stapling mechanism.

REFERENCES:
patent: 1918890 (1933-07-01), Bacon
patent: 2434030 (1948-01-01), Yeomans
patent: 2638901 (1953-05-01), Sogerbaker
patent: 3193165 (1965-07-01), Akhalaya et al.
patent: 3388847 (1968-06-01), Kasolin et al.
patent: 3552626 (1971-01-01), Astafiev et al.
patent: 3638652 (1972-02-01), Kelley
patent: 3805793 (1974-04-01), Wright

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