Lung ventilation equipment

Details Lung ventilation equipment Lung ventilation equipment

1975-11-18

1977-07-05

Michell, Robert W.

Surgery

Truss

Pad

A61M 1600

Patent

active

040333434

ABSTRACT:
Lung ventilation equipment comprising a gas pulse source delivering pulses of breathable gas to a patient valve for introduction into the respiratory system of a patient for resuscitation or anaesthetic purposes is characterized by a restrictor in the pulse delivery line from the pulse source to the patient valve, the restrictor being constructed to operate in a sonic-flow "choked" condition during passage of a gas pulse therethrough so that system pressures and resistances downstream of the restrictor cannot affect operation of the pulse source. Downstream of such a restrictor, therefore, conduits may be of small bore while the patient valve may be of the low-pressure type that normally requires a large-bore supply conduit.

REFERENCES:
patent: 3683951 (1972-08-01), Beaumint
patent: 3809109 (1974-05-01), Breiling et al.
patent: 3889669 (1975-06-01), Weigh
patent: 3915164 (1975-10-01), Bird

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