Method and apparatus for delivering a stable gas mixture to a pa

Details Method and apparatus for delivering a stable gas mixture to a pa Method and apparatus for delivering a stable gas mixture to a pa

1992-04-07

1994-08-09

Burr, Edgar S.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

12820511, 128718, 12820024, A61M 1600

Patent

active

053356535

ABSTRACT:
A method and apparatus for delivering respiratory gases to a patient maintains a mixture of gases stable and minimizes the effects of ambient air leakage. Some of the gases supplied to a gas collection unit in which the patient's head is placed are by-passed to a buffer space that partially surrounds the gas collection unit. The volume of the buffer space stabilizes the mixture and outflow from the buffer space minimizes ambient air leakage into the gas collection unit. Gases from the gas collection unit are supplied to a measuring unit for analyzing the gas respired by the patient.

REFERENCES:
patent: 3680557 (1972-08-01), Doniguian
patent: 3786809 (1974-01-01), Kitrilakis
patent: 3799163 (1974-03-01), Heath
patent: 4407280 (1983-10-01), Trammell
patent: 4620538 (1986-11-01), Koegel
patent: 4763664 (1988-08-01), Merilainen
patent: 4832042 (1989-05-01), Poppendiek
patent: 5040541 (1991-08-01), Poppendiek

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