Anesthetic system with multiple valve-controlled bellows
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United States of America Patent
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Jun 23, 1998
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N/A
app pub date -
Mar 18, 1997
filing date -
Mar 20, 1996
priority date (Note) -
Expired
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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.
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