Flow restrictor for measuring respiratory parameters
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United States of America Patent
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-
May 1, 2001
Grant Date -
N/A
app pub date -
Sep 11, 1998
filing date -
Sep 11, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A flow restrictor is applied to a respiration-channeling device such as a tracheostomy tube, a mouthpiece, or a face mask. The flow restrictor creates a pressure differential which varies with volume flow rate. A pressure reading is taken on either side of the flow restrictor in the respiration-channeling device and from this, a volume flow rate is determined. A data acquisition device is used to derive further pulmonary function parameters from the volume flow rate.
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