GE HEALTHCARE B20, User'S Reference Manual

Page: 177 / 320

Troubleshooting
10-13
Advanced NIBP troubleshooting
Symptom Possible cause and solution
NIBP measurement does
not work or values seem
unstable
•
Check that cuff tubings are not bent, stretched, compressed or loose.
•
Prevent motion artifacts.
•
Use cuffs of correct size.
Why does the mean
value display while the
associated systolic and
diastolic values display
as - - -? The following conditions may cause the mean value to display in the NIBP
parameter window while the associated systolic and diastolic values display as
- - -.
•
Very low systolic and diastolic amplitude fluctuations (e.g., patient in shock).
•
Very small difference between the mean and systolic pressure or the mean
and diastolic pressure.
•
Loss of system integrity (e.g., loose connections or worn parts).
Assess the patient and perform a visual inspection of the equipment to ensure
system integrity.
Why is the monitor re-
inflating the cuff
automatically? The cuff target pressure must be higher than the patient’s systolic pressure to
obtain an accurate systolic and diastolic measurement. If a systolic blood
pressure cannot be found, the monitor searches for a systolic reading by re-
inflating the cuff at a higher pressure. This systolic search may occur once per
NIBP determination cycle. During a systolic search, the maximum cuff inflation
pressure will not exceed the normal pressure range of the cuff.
The monitor may be taking a control measurement. If the measured NIBP value
exceeds the alarm limits, a single low priority alarm sounds and a new
measurement is automatically taken. If the new value (the control
measurement) also exceeds the alarm limits the alarm priority escalates to
medium. In Manual mode and STAT mode there are at least four seconds
between the first measurement and the Control measurement for Adult and
Child cuffs, eight seconds for Infant cuffs. In Auto mode there are at least 30
seconds between the first measurement and the control measurement.
If
Weak pulsation is detected, the module repeats the measurement up to
three times. Assess the patient and perform a visual inspection of the
equipment to ensure system integrity.
If cuff occlusion is detected during inflation the module might repeat the
measurement. Perform a visual inspection of the equipment to ensure system
integrity.