Pressure Changes
Measurements will be unreliable and may not be possible if the patient's blood pressure is changing
rapidly over the period of time during which the arterial pressure pulses are being analyzed to obtain
the measurement.
Severe Shock
If the patient is in severe shock or hypothermia, measurements will be unreliable since reduced
blood flow to the peripheries will cause reduced pulsation of the arteries.
Heart Rate Extremes
Measurements can not be made at a heart rate of less than 40 bpm and greater than 240 bpm.
Obesity patient
The thick fat layer of body will reduce the measurement accuracy, because the fat that come from
the shock of arteries can not access the cuffs due to the damping.
The following conditions may also cause changes in the blood pressure measurement value
After eating (within 1h), or having drinks containing alcohol or caffeine, or after smoking,
taking exercises or bathing;
Using incorrect posture such as standing or lying down, etc.;
The patient speaks or moves his body during measurement;
When measuring, the patient is nervous, excited, or in unstable emotion;
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