9-3
9.3 Measurement Limitations
Measurements are impossible with heart rate extremes of less than 40 bpm or greater
than 240bpm, or if the patient is on a heart-lung machine.
The measurement may be inaccurate or impossible:
If arterial pressure pulses are hard to detect
In the presence of excessive and continuous patient movement such as
shivering or convulsions
During certain cardiac arrhythmias
For pregnant or pre-eclamptic patients
Rapid blood pressure changes
Severe shock or hypothermia that reduces blood flow to the peripheries
Obesity, where a thick layer of fat surrounding a limb dampens the oscillations
coming from the artery
9.4 NIBP Measurement Mode
There are the following modes of measuring NIBP:
Manual: measurement on demand.
Auto: continually repeated measurements at set intervals.
STAT: continually rapid series of measurements over a five minute period, then
return to the previous mode.
Program: continually automatic measurement at set durations and intervals.
To set NIBP measurement mode, select NIBP parameter area to access [NIBP Setup]
menu:
Select [Interval] to select manual mode or auto NIBP measurement interval.
Select [NIBP STAT] to start a continuous NIBP measurement.
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