Ventilators and pressure oscillators therefor

Details Ventilators and pressure oscillators therefor Ventilators and pressure oscillators therefor

A - Human Necessities

61

H

137/1.511

A61H 31/02 (2006.01)

Patent

CA 1279549

27 ABSTRACT VENTILATORS AND PRESSURE OSCILLATORS THEREOF A ventilator for producing artificial respiration comprises a pressure chamber for receiving at least the chest of a patient so as to establish a volume exterior of the chest between which volume and the lungs of the patient a pressure differential may be produced by pressure changes applied to said chamber, means for establishing a sub-ambient pressure in the chamber, and means for varying the pressure in the chamber so as to superimpose on the sub-ambient pressure a cyclic variation having a frequency of above 1 Hz.

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