Peak respiratory flow monitor

Details Peak respiratory flow monitor Peak respiratory flow monitor

1981-03-02

1983-12-20

Apley, Richard J.

Surgery

Truss

Pad

A61B 502

Patent

active

044211201

ABSTRACT:
A peak respiratory flow monitor utilizes an enclosure having a series of openings through the wall thereof, a provision for covering a desired number of these openings, and a provision for generating a signal when the air flow through the enclosure reaches a threshold. In a preferred embodiment the enclosure includes an elongated tubular member, and the threshold indicator is a reed placed in a chamber that has an adjustable valve for calibrating the flow past the reed. Furthermore, the chamber causes a displacement of flow from along the longitudinal axis of the tubular member.

REFERENCES:
patent: 2505141 (1950-04-01), Pitts
patent: 2908244 (1959-10-01), Clark
patent: 2915851 (1959-12-01), Ringman
patent: 3298362 (1967-01-01), Lippitt, Jr. et al.
patent: 3367324 (1968-02-01), DeBono
patent: 3949738 (1976-04-01), Monroe
"A Whistle for Testing Lung Function" The Lancet 11/30/63, DeBono, pp. 1146, 1147.

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