Ultrasonic spirometer

Details Ultrasonic spirometer Ultrasonic spirometer

1995-06-07

1997-07-15

Sykes, Angela D.

Surgery

Truss

Pad

A61B 800

Patent

active

056473702

ABSTRACT:
The invention relates to an ultrasonic spirometer with a graduated tube where a transmitter/receiver cell pair is positioned in a graduated portion diagonally or perpendicularly to the graduated tube axis, with an easily replaceable breathing tube being insertable into the graduated tube. The breathing tube is at least partially made from essentially one material which is permeable for ultrasonic waves, but wholly or at least largely impermeable to germs and contaminants. In accordance with the invention, the material permeable for the ultrasonic waves and wholly or at least largely impermeable to the germs and contaminants is positioned at least in the area in which the graduated portion intersects the graduated tube over the whole circumference of the breathing tube.

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