04158360 is referenced by 28 patents and cites 7 patents.

A peak expiratory flow meter device for indicating airway obstruction in a patient. The device includes an elongated channel arranged perpendicularly to a mouthpiece, at the end of which an adjustable orifice is disposed. A float moves within the channel in response to expiration from the patient. A removable pin is provided with the channel for accommodating various ranges of expiration, and for the same general reason, rotatable discs are provided to partially cover the orifice.

Title
Expiratory flow meter
Application Number
5/872698
Publication Number
4158360
Application Date
January 26, 1978
Publication Date
June 19, 1979
Inventor
Jim M Adams
Mt. Pleasant
SC, US
Agent
Wolder Gross & Yavner
Assignee
Projects in Health
NJ, US
IPC
A61B 5/08
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