Anesthetic metering device

Details Anesthetic metering device Anesthetic metering device

1992-02-10

1993-03-30

Burr, Edgar S.

Surgery

Respiratory method or device

Means for mixing treating agent with respiratory gas

12820327, 13710111, A61M 1601

Patent

active

051974622

ABSTRACT:
An anesthetic metering device with a bypass stream 5 passed from a gas inlet opening 2 via a bypass valve 3 to a gas discharge opening 4 and with a vaporizer chamber stream 7 flowing from a vaporizer chamber 6 via an adjusting device. Accurate metering is possible even in the case of anesthetics with low boiling points by manufacturing the vaporizer chamber 6 at least at the saturation vapor pressure of the anesthetic 22. The adjusting device includes a differential pressure transducer 9 connected on both sides of the bypass valve 3 and a metering valve 10, wherein the metering valve 10 is actuated by the output quantity 11 of the differential pressure transducer 9 via a proportional member 12 so that the concentration is adjusted via the variable transmission ratio of the proportional member 12.

REFERENCES:
patent: 3527213 (1970-09-01), Schreiber
patent: 3590846 (1971-07-01), Eisele
patent: 3998239 (1976-12-01), Kruishoop
patent: 4237925 (1980-12-01), Urushida
patent: 4328823 (1982-05-01), Schreiber

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