Method and apparatus for supplying fresh gas to a patient during

Details Method and apparatus for supplying fresh gas to a patient during Method and apparatus for supplying fresh gas to a patient during

1994-01-31

1996-03-12

Lewis, Aaron J.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

12820514, A61M 1600

Patent

active

054977673

ABSTRACT:
In a method for supplying fresh gas in manual ventilation of a patient and in a ventilator system for practicing the method, the supply of fresh gas to a breathing bag is regulated. During inspiration, the breathing bag is squeezed, imposing an inspiration on the patient. A detector at the breathing bag senses when the patient exhales, and an identical flow of gas is fed to the system via an inspiratory valve, the flow of fresh gas is directed into the breathing bag and expired gas is prevented from entering the breathing bag. An expiratory valve simultaneously opens to conduct expired gas out of the system.

REFERENCES:
patent: 3307542 (1967-03-01), Andreasen
patent: 3530856 (1970-09-01), Bird
patent: 3537450 (1970-11-01), Fox
patent: 3739776 (1973-06-01), Bird et al.
patent: 3974027 (1974-02-01), Johnson
patent: 4351329 (1982-09-01), Ellestad et al.

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