Capnia, Incorporated

Ralph Walden

Elvir Causevic

Lee R Carlson

Joe Martinosky

Edward A McClatchie

An improved apparatus and method for capturing and analyzing the end-tidal portion of an exhalation. The COlevel of air drawn into the system () is monitored to distinguish inhalation and exhalation of breath. Upon detection of a decrease in the COlevel in the air drawn into the system (), indicating a transition between exhalation and inhalation a pair of flow selector valves () are operated to capture the end-tidal volume of air drawn into the system () immediately prior to the detection of the decrease in the COlevel. Incoming air is diverted around the captured volume of air, and the COlevels are continually monitored to ensure that the captured volume of air corresponds to the end-tidal portion of an exhalation. Once the captured volume of air is positively identified as the end-tidal portion of an exhalation, the captured volume is routed through a gas analyzer () for analysis of one or more predetermined gas levels.

Growing community of inventors

Granite City, IL, United States of America

Ralph Walden