Inventors:
Arlin D. Lehman - Louisville CO
Assignee:
Polmonary Data Service Instrumentation, Inc. - Louisville CO
International Classification:
A62B 710
A61B 508
Abstract:
An interchangeable set of wide orifice respiratory filter elements can be built into either a low resistance, high dead space embodiment for forced vital capacity testing or high resistance, low dead space embodiment for diffusion and residual air tests. A disposable 3M Filtrete. TM. pad is at the heart of all embodiments thus allowing extremely high levels of filtration efficiencies.