Anesthetic system with multiple valve-controlled bellows

Details Anesthetic system with multiple valve-controlled bellows Anesthetic system with multiple valve-controlled bellows

1997-03-18

1998-06-23

Asher, Kimberly L.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

12820428, 12820515, 12820516, 12820517, 12820422, A62B 704, A61M 1600, F16K 3102

Patent

active

057690723

ABSTRACT:
An anesthetic system has an external gas reservoir and three gas bellows arranged in the external gas reservoir to alternatingly collect or deliver breathing gas from and to a ventilator unit. In this manner a completely closed system is achieved with minimal consumption of, primarily, anesthetic. The bellows are regulated by a regulatory unit which, via a valve system, can selectively connect a source of drive gas to one or more of the containers in order to compress the gas bellows respectively contained therein. When no drive gas is supplied, each bellows passively expands.

REFERENCES:
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patent: 2711170 (1955-06-01), Bornstein
patent: 3499438 (1970-03-01), Manley
patent: 3523527 (1970-08-01), Foster
patent: 3789837 (1974-02-01), Phillips et al.
patent: 3890967 (1975-06-01), Elam et al.
patent: 3921628 (1975-11-01), Smythe et al.
patent: 3923053 (1975-12-01), Jansson
patent: 4299216 (1981-11-01), Bernard et al.
patent: 4905685 (1990-03-01), Olsson et al.

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