12-2
12.2 Safety
WARNING
Be sure to select the correct patient category setting for your patient before measurement. Do not apply the
higher adult settings for pediatric or neonatal patients. Otherwise it may present a safety hazard.
Do not measure NIBP on the limb where skin damage has occurred or is expected.
Use clinical judgement to determine whether to perform frequent unattended blood pressure
measurements on patients with severe blood clotting disorders because of the risk of hematoma in the limb
fitted with the cuff.
Do not use the NIBP cuff on a limb with an intravenous infusion or arterial catheter in place. This could cause
tissue damage around the catheter when the infusion is slowed or blocked during cuff inflation.
Do not use the NIBP cuff on the arm on the side of a mastectomy.
Continuous CUFF pressure due to connection tubing kinking may cause blood flow interference and
resulting harmful injury to the patient.
NIBP reading can be affected by the measurement site, the position of the PATIENT, exercise, or the patient's
physiologic condition. If you doubt the NIBP readings, determines the patient’s vital signs by alternative
means and then verify that the monitor is working correctly.
12.3 Measurement Limitations
Measurements are impossible with heart rate extremes of less than 40bpm or greater than 240bpm, or if the patient is
on a heart-lung machine.
The measurement may be inaccurate or impossible:
If a regular arterial pressure pulse is hard to detect
With excessive and continuous patient movement such as shivering or convulsions
With cardiac arrhythmias
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
12.4 Measurement Methods
There are four methods 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.
Sequence: continually automatic measurement at set durations and intervals.
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