75
NOTE:
l
If you are in doubt about the accuracy of any reading(s), check the patient's vital signs by an alternative
method before checking the functioning of the monitor.
l
When the alarm prompt information for low battery appears, it is not recommended to start NIBP
measurement. As in this circumstance, it may cause device shutdown.
13.3 Measurement Limitations
NIBP measurement can not be done on the patients with extreme heart rate(lower than 40 bpm or higher than 240 bpm)
or connecting with heart-lung machine.
The measurement may be inaccurate or can not be done in the following conditions:
n
Patient Movement
Measurement will be unreliable or may be impossible if the patient is moving, shivering or having convulsions. As
these conditions may interfere the detection of the arterial pressure pulsation, and the measurement time will be
prolonged.
n
Cardiac Arrhythmia's
Measurement will be unreliable and may be impossible if the patient has irregular heartbeat arisen from cardiac
arrhythmia, and the measurement time will be prolonged.
n
Pressure Change
Measurement will be unreliable and may be impossible if the patient's blood pressure is changing rapidly over the
period of time during which the arterial pressure pulsation are being analyzed to obtain the measurement values.
n
Severe Shock
If the patient is in severe shock or hypothermia, measurements will be unreliable since the decrease for the blood
flowed to the peripheries will cause the reduction of artery pulsation.
n
Fat patient
The thick fat layer under the limb will decrease the measurement accuracy, as the vibration from artery can not arrive to
the cuff which is arisen from the fat damping.
13.4 Measurement steps
1.
Confirm the patient type, if it is false, please change "Patient type" in "PATIENT SETUP" of "SYSTEM MENU".
2.
Connect the airway tube with the NIBP interface of the device, then switch on thedevice.
3.
Select the cuff, make sure the cuff is completely deflated, then apply the cuff to the patient's arm or leg following
the instructions below.
n
Confirm the limb perimeter of the patient.
n
Apply the cuff to the patient's arm or leg, and make sure that the symbol "
φ
" exactly locates to the artery. Ensure
that the cuff is not wrapped too tightly around the limb, otherwise it will cause discoloration or ischemia of the
limb. Check the cuff edge is in the range marked <->, otherwise please change an appropriate cuff.
n
The width of the cuff should be either 40% of the limb circumference (50% for neonates) or 2/3 of the upper arm
length. The inflatable part of the cuff should be long enough to encircle 50-80% of the limb. The wrong size of
cuff can cause erroneous readings. If the cuff size has problem, then use a larger cuff.
