Respiratory air flow sensor

Details Respiratory air flow sensor Respiratory air flow sensor

1998-10-14

1999-07-20

Patel, Harshad

Measuring and testing

Volume or rate of flow

Using differential pressure

7386163, 12820423, G01F 137, A61M 1600

Patent

active

059258314

ABSTRACT:
The air flow sensor for a respiratory air flow measuring systems includes a tubular member for providing an air passageway for the flow of air between a patient and a ventilator. The passageway includes a fixed orifice-type obstruction comprised of a plurality of aerodynamically curved vanes which produce a pressure drop as the air flows through the passageway. The air flow rate of the patient's respirations is calculated by measuring the pressure differential between two longitudinally spaced apart pressure measuring air ports bored within one of the vanes in the air flow sensor. A third air port hole extracts respiratory gas samples for content analysis.

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