Breathing assistance device

Details Breathing assistance device Breathing assistance device

1974-04-11

1978-05-09

Michell, Robert W.

Surgery

Truss

Pad

1281458, A61M 1600

Patent

active

040881318

ABSTRACT:
The lung inflation system specifically designed for use in the resuscitation of human beings. The system includes a manual compression bag which empties and refills through a single outlet opening. The compression bag is connected to a non-rebreathing valve which is specifically built, in accordance with the invention, so that the patient's lungs can be ventilated by means of the compression bag with pure oxygen, pure air, or a known mixture of both gases, as desired. The valve has a gas selector mechanism which makes it very easy for rescue personnel using the device to quickly select the mixture of gases which is needed. When available, oxygen from a pressurized oxygen source is supplied continuously to the valve device. The valve operates so that, when the compression bag is full, any excess oxygen being fed into the system is vented to the atmosphere through the same port as the one through which the breath exhaled by the patient passes. However, when the bag is compressed to inflate the patient's lungs, the exhaust port is closed so that the gases in the bag will flow only to the patient's lungs. When oxygen is not available the system operates to provide air for lung inflation.

REFERENCES:
patent: 733027 (1903-07-01), Goldan
patent: 912532 (1909-02-01), Brat
patent: 955121 (1910-04-01), Hollett
patent: 1176886 (1916-03-01), Ermold
patent: 3262446 (1966-07-01), Stoner
patent: 3473529 (1969-10-01), Wallace

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