Sigh producing mechanism for positive pressure respirator

Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure

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12820524, A61M 1600

Patent

active

043017932

ABSTRACT:
A sigh producing mechanism in a blower type positive pressure respirator. In breathing, a normal person will occasionally take a deep breath, a sigh, to break the monotony of regular breathing. In artificial respiration, such occasional sighs are also desired. The sigh is produced by an increase in the speed of the blower for a few breathing cycles. To produce the sigh, the resistance to the blower motor is reduced and this is accomplished with the aid of a timer to space the sigh intervals and limit the duration of the sigh cycles.

REFERENCES:
patent: Re29778 (1978-09-01), Stewart
patent: 3863630 (1975-02-01), Cavallo
patent: 3910270 (1975-10-01), Stewart

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