Inventors:
Robert Grier Monroe - Westwood MA
Assignee:
Thermo Electron Corporation - Waltham MA
International Classification:
A61B 508
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.