Patent ID: 11890089
Assignee: THORASYS THORACIC MEDICAL SYSTEMS INC.
Field: Measurement (Instruments)
Classification: CPC A  G | IPC A  G

Claim 0:
1. A device for measuring airway resistance comprising:
a shutter;
a flow tube having a proximal end, for engaging a patient's mouth, a distal end, for receiving said shutter to releasably occlude said flow tube, and a medial pneumatic port;
a baffle located upstream of said pneumatic port, said baffle projecting from a sidewall near said pneumatic port so as to create a negative pressure at said pneumatic port;
a sensor for measuring pressure in said flow tube during occlusion and entrainment pressure caused by air flow through the tube during exhalation, wherein said sensor is in communication with said pneumatic port; and
a shutter release mechanism to keep said flow tube closed with said shutter during occlusion and to release said shutter at the end of occlusion.