Gas and liquid contact apparatus – With external supply or removal of heat – Automatic control of heat supply or heat effect
Patent
1982-04-14
1984-10-16
Recla, Henry J.
Gas and liquid contact apparatus
With external supply or removal of heat
Automatic control of heat supply or heat effect
261129, 261142, 261DIG65, 12820314, 12820327, 219272, B01F 304, A61M 1600
Patent
active
044773951
ABSTRACT:
An apparatus is disclosed for admixing anesthetic with respiratory gas to be supplied to a patient, which comprises a mixing chamber having an inlet for receiving the liquid anesthesia and the respiratory gas, and an outlet for supplying the mixture. A feed line is provided in the inlet for the liquid anesthesia, with a heat exchanger for equalizing the inlet temperatures of the anesthesia and respiratory gas. Temperature sensors are provided in the inlet and the outlets with a circuit for determining the difference between the temperatures. Without heating of the chamber this difference is proportional to a ratio between the evaporated anesthetic and respiratory gas. With the chamber heated to equate the inlet and outlet temperatures, the amount of heating is proportional to the flow of anesthetic to the chamber.
REFERENCES:
patent: 2888922 (1959-06-01), Bellville
patent: 3251361 (1966-05-01), Rusz
patent: 3303883 (1975-09-01), Pecina et al.
patent: 4201204 (1980-05-01), Rinne et al.
patent: 4369777 (1983-01-01), Lwoff et al.
Dragerwerk Aktiengesellschaft
Recla Henry J.
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