Carbon dioxide absorption canister for use with analgesia equipm

Details Carbon dioxide absorption canister for use with analgesia equipm Carbon dioxide absorption canister for use with analgesia equipm

1977-06-14

1978-08-22

Michell, Robert W.

Surgery

Truss

Pad

A61M 1600

Patent

active

041081722

ABSTRACT:
A carbon dioxide absorption canister is used with a closed circuit or circle analgesia apparatus, including a gas supply machine, a face mask for the patient, and inhalation and exhalation conduits. The carbon dioxide absorption canister is operatively coupled to both the gas supply machine and the face mask. The canister is composed of a container having a cylindrically shaped side wall with an integral bottom and a removable lid. Both the container and the lid are composed of a synthetic, transparent, resinous material such as an acrylic resin. The gas inlet from the patient to the canister is located at the bottom and contains a check valve that allows flow only into the canister through the inlet. An absorption medium support tray, positioned in the container and spaced above the bottom of the container, supports a quantity of absorption medium, such as soda lime. The outlet from the container is located in the lid and contains a second check valve that only allows flow from the container through the outlet. A third fitting on the bottom of the container operatively couples an expansible air bag with the interior of the container.

REFERENCES:
patent: 2586670 (1952-02-01), Lambertsen
patent: 2586677 (1952-02-01), Marrett
patent: 2614561 (1952-10-01), Fox
patent: 2837413 (1958-06-01), Hay
patent: 2877098 (1959-03-01), Ruth
patent: 3202150 (1965-08-01), Miller
patent: 3378005 (1968-04-01), Smith, Jr.
patent: 3589870 (1971-06-01), Rankin
patent: 3612048 (1971-10-01), Takaoka
patent: 3615233 (1971-10-01), Doering
patent: 3738360 (1971-04-01), Dryden
patent: 3830632 (1974-08-01), Guzay

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