Measurement Limitations - EDAN M3A User Manual

M3A Vital Signs Monitor User Manual
10 NIBP readings can be affected by the measurement site, the position of the patient,
exercise, or the patient's physiologic conditions.
11 Continuous cuff pressure due to connection tubing kinking can block the blood flow,
and may result in injury to the patient.
12 Verifying the calibration is only applicable for adults, and it can not be operated in
automatic measuring interval. Continuous measuring can not be operated in
automatic measuring interval either.
NOTE:
1 It is suggested that the user should not start NIBP measuring when the low battery
displays, or the monitor may be turned off automatically.
2 If you spill liquid onto the equipment or accessories, particularly if there is a chance
that it can get inside the tubing or the measurement device, contact your service
personnel.
3 Continuous use of the automatic measuring mode for short intervals may lead to the
discomfort of patient. Continuous measuring and automatic measuring in neonatal or
pediatric mode may result in tissue damage or ischemia to the patient.
4 NIBP measurement can be affected by extremes of temperature, humidity and
altitude.
5 NIBP measurement value should be explained by qualified professionals.
6 The pulse rate based on the NIBP measurement may differ from the heart rate based
on the ECG waveform. NIBP measures the number of peripheral pulse pulsations,
and the heart rate is measured by the electrical signal of the heart. When the electrical
signals of the heart occasionally fail to cause the peripheral blood vessels to pulse or
the patient's peripheral perfusion is poor, the difference happens.
7 The cumulative use time for the NIBP cuff in a single patient should be less than 30
days.

9.3 Measurement Limitations

Measurements are impossible with pulse rate extremes of less than 40 bpm or greater than 240
bpm, or if the patient is on a heart-lung machine.
The measurement may be inaccurate or impossible in the following situations:
 A regular arterial pressure pulse is hard to detect.
 Patients with cardiac arrhythmias.
 Patients with excessive and continuous movement such as shivering or convulsions.
 Patients with rapid blood pressure changes.
 Patients with severe shock or hypothermia that reduces blood flow to the peripheries.
WARNING
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NIBP Monitoring (Optional)