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Primary Examiner: Swisher, S. Clement
Assistant Examiner: Corr, Denis E.
Attorney: Neal; James L.

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Title: Peak ventilatory flow indicator

Abstract: A peak ventilatory flow rate indicator includes a hollow tube open at each end and has a series of small graded openings which hold a liquid by surface tension. When a subject ventilates his lungs through the tube as rapidly as possible, the number of graded openings from which the liquid is expelled is a function of peak ventilatory flow rate and an indication of pulmonary function.

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Inventors: Monroe, Robert Grier (Westwood, MA, US)

Application Number: 520189
Filing Date: 1974-11-01
Publication_date: 1976-04-13
Assignee: Thermo Electron Corporation (Waltham, MA)
Primary Class(es): 600/538 116/264
Other Classes:
US Patent Ref:

737008	Aug, 1903	Nichol	272/57.
741492	Oct, 1903	Henrichsen	128/2.

Other Refs: Other References: Bono, E. F. De, A Whistle for Testing Lung Function, The Lancet, Vol. 2 (63) No. 7318, Nov. 30, 1963, pp. 1146 & 1147.