F9 and F9 Express Fetal & Maternal Monitor User Manual Maternal Monitoring
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2) Cardiac Arrhythmia
Measurements will be unreliable and may not be possible if the patient's cardiac arrhythmia
has caused an irregular heartbeat. The measuring time thus will be prolonged.
3) Heart-lung Machine
Measurements will not be possible if the patient is connected to a heart-lung machine.
4) 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.
5) 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.
6) Heart Rate Extremes
Measurements can not be done to a patient whose heart rate is lower than 40 bpm or higher
than 240 bpm.
9.4.2 How to Apply NIBP Cuff
WARNING
Accuracy of NIBP measurement depends on using a cuff of the proper size. It is
essential to measure the circumference of the limb and choose the proper cuff size. If
you find something is wrong with the cuff size, please replace it immediately.
1) Select appropriate cuff for the patient.
The table below lists the reference size:
2) Squeeze the cuff to discharge the air.
3) Apply the cuff to the patient; make sure that the index line is placed in the appointed range and
the symbol is over the appropriate artery (Refer to figure 9-4). If the index line is not in
the appointed range, please replace for a proper one. Ensure that the cuff is not wrapped too
tightly around the limb. Excessive tightness may cause discoloration and eventual ischemia of
the extremities.
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