Surgery – Respiratory method or device – Means for mixing treating agent with respiratory gas
Patent
1994-11-21
1996-04-23
Bennett, Christopher A.
Surgery
Respiratory method or device
Means for mixing treating agent with respiratory gas
12820014, 261 76, A61M 1500
Patent
active
055094058
ABSTRACT:
A vaporizer for introducing a vapor of an anesthetic liquid into t carrier gas for introduction into a patient is disclosed. The vaporizer directly vaporizes the liquid by introducing the liquid into a vaporizing chamber having an extremely large width to height ratio, i.e. in excess of 600:1. The carrier gas flows in laminar flow through the vaporizing chamber and the liquid anesthetic is introduced at a controlled flow such that it immediately vaporizes upon introduction to the entrance of the vaporizing chamber. A control scheme utilizing a CPU controls the percentage of anesthetic vapor in the outlet gas by sensing certain parameters and then controlling the flow of liquid anesthetic by controlling the speed of a controllable speed pump.
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Bennett Christopher A.
Cassett Larry R.
Ohmeda Inc.
Raciti Eric P.
Rathbun Roger M.
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