Respiration sensors

Details Respiration sensors Respiration sensors

1978-09-26

1980-06-10

Watkins, Donald

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

12820423, G01F 168, A61B 508

Patent

active

042066441

ABSTRACT:
A respiration sensor for use with a medical ventilator, suitably between the patient airway and the Y-piece where the expiratory and inspiratory flows separate, comprises a tube with a flap mounted therein, the flap being resiliently and magnetically biassed to a datum position extending transversely across the tube interior, but the flap being movable in opposite senses from its datum in response to gas flow from the tube, and means for selectively detecting such opposite movements. The flap preferably leaves a gap.

REFERENCES:
patent: 3265062 (1966-08-01), Hesse
patent: 3680378 (1972-08-01), Aurilio et al.
patent: 3946726 (1976-03-01), Pikul
patent: 3962917 (1976-06-01), Terada
patent: 3971253 (1976-07-01), Hini et al.
patent: 4003255 (1977-01-01), Spencer
patent: 4041756 (1977-08-01), Head et al.

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