User's Manual

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Figure 14 MVV measurement results interface
6.5.1 Operation steps
1) Subject takes a standing or sitting position, clamps the nose clip, and connects the
mouthpiece to the device, and breathes calmly for 4 to 5 times. After the exhalation is
stable, continue to breathe for 12 or 15 seconds at the maximum breathing amplitude
and maximum speed.
Caution:
The user purchases a nose clip, which must be a legally marketed product registered
by the FDA.
2) The whole inspection process, the subjects can obtain the best cooperation according
to the timely instructions and continuous guidance issued by the technician. Repeat
the second and third tests after rest of 5 to 10 minutes.