Welch Allyn CP 150 spirometry option - User Manual - Manual (Page 44)

Symptom Possible cause Suggested action
Values are too high (consistently) Pressure connection is partially
obstructed
Remove any foreign substance from the
flow transducer or pressure tubing.
Predictive values are blank The selected norm does not support
certain values, and composite norm
values are disabled
Re-enter age/birthdate, height, gender,
race.
(Fill in the fields. All mandatory fields
must be filled in before you can
proceed.)
Enable composite norm values. See
Viewing or changing the spirometry
settings.
The flow sensor has been dropped. Accident Recalibrate. See Performing a
calibration.
Report does not print parameters or
graphs.
Improper parameter settings Check print settings. See Viewing or
changing the spirometry settings.
Patient test values differ from values
expected by physician.
Various If the transducer is contaminated with
sputum or secretions, replace it.
Verify that proper barometric pressure
has been entered. See Performing a
calibration.
Verify the patient data.
Eliminate any leaks in the pressure
tubing.
Retest using a nose clip.
Replace the sensor if damaged.
Recalibrate.
Replace the transducer and retest.
40 Troubleshooting CP 150 spirometry option