High-frequency jet ventilator

Details High-frequency jet ventilator High-frequency jet ventilator

1985-07-11

1986-12-30

Husar, Stephen F.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

12820425, 137810, 137813, A62B 700

Patent

active

046321071

ABSTRACT:
An opposing vortex oscillator is used to control the frequency and duty cycle of a high-frequency jet ventilator for trauma management in acute and uncontrolled situations where no power other than the pressure of the ventilation gas itself is available. Frequency adjustment is achieved by connecting variable volumes to one inlet of the oscillator while duty cycle control is achieved by supplying fluid to one inlet of the oscillator through a variable-orifice bias control valve. Safety means are provided to automatically disable the ventilator in case of airway blockage.

REFERENCES:
patent: 3756285 (1973-09-01), Johnson et al.
patent: 4007736 (1977-02-01), Schreiber
patent: 4340045 (1982-07-01), Manley

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