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Chapter 10: NIBP Monitoring
User Manual
Warning
Prolonged non-invasive blood pressure measurements in STAT mode may be associated
with ischemia, neuropathy or dermal injuries in the limb wearing the cuff.
NOTE:
If you are in doubt about the accuracy of any measurement(s), check the patient's vital
signs by an alternative method before checking the functionality of the monitor. Then
check the correct connections, cuffs, hoses and system performance
Measurement Limitations
In different patient conditions, the oscillometric measurement has certain limitations. The
measurement is in search of regular arterial pressure pulse. In those circumstances, when the
patient's condition makes it difficult to detect, the measurement becomes unreliable and
measuring time increases. The user should be aware that the following conditions could interfere
the measurement and make the measurement unreliable or longer. In some cases, the patient's
condition will make a measurement impossible.
●Patient Movement
Measurements will be unreliable or may not be possible if the patient is moving, shivering or
having convulsions. These motions may interfere the detection of the arterial pressure pulses. In
addition, the measurement time will be prolonged.
●Cardiac Arrhythmias
Measurements will be unreliable and may not be possible if the patient's cardiac arrhythmia
causes an irregular heart beat. Thus the measuring time will be prolonged.
●Heart-lung Machine
Measurements will not be possible if the patient is connected to a heart-lung machine.
●Pressure Changes
Measurements will be unreliable and may not be possible if the patient's blood pressure changes
rapidly over a short period of time.
●Severe Shock
If the patient is in severe shock or hypothermia, measurements will be unreliable because of
reduced pulsation of the arteries.
●Irregular Heart Rate
Measurements cannot be performed at a heart rate of less than 40 bpm and greater than 240 bpm.
10-7
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