Ultrasonic spirometer
First Claim
1. An ultrasonic spirometer comprising:
- a graduated tube extending along a graduated tube axis,a transmitter/receiver cell pair positioned in a graduated portion of said graduated tube disposed at an angle to the graduated tube axis,an easily replaceable breathing tube insertable into the graduated tube, the breathing tube including one material which is permeable for ultrasonic waves but substantially impermeable to germs and contaminants,the material being positioned in an area in which the graduated portion of said graduated tube intersects the graduated tube and over an entire circumference of the breathing tube.
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Accused Products
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.
40 Citations
15 Claims
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1. An ultrasonic spirometer comprising:
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a graduated tube extending along a graduated tube axis, a transmitter/receiver cell pair positioned in a graduated portion of said graduated tube disposed at an angle to the graduated tube axis, an easily replaceable breathing tube insertable into the graduated tube, the breathing tube including one material which is permeable for ultrasonic waves but substantially impermeable to germs and contaminants, the material being positioned in an area in which the graduated portion of said graduated tube intersects the graduated tube and over an entire circumference of the breathing tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification