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Chapter 10: NIBP Monitoring
10.4 Frequently Asked Questions
1- Why does the monitor sometimes reinflate the NIBP cuff?
The monitor will typically pump to an initial pressure of 150 mmHg or 30 mmHg higher than the
last systolic reading in subsequent measurements. If the patient's systolic pressure is higher than
this initial pressure, reinflation will occur.
Repeated re-inflation during a measurement may be an indication of patient motion, inappropriate
cuff size, the cuff leakage, insecure connection of tubes to rectus or the monitor failure.
2- Can an oscillometric NIBP simulator be used to determine accuracy of the NIBP modules?
The NIBP module manufacturers use different criteria to calculate the systolic and diastolic
pressure values; it is unreasonable to expect a single NIBP simulator to achieve universal
agreement with all clinically approved oscillometric blood pressure modules. In the area of blood
pressure simulation, it is not the absolute agreement between the oscillometric blood pressure
monitor and an NIBP simulator that matters, but how repeatable the results produced by the
monitor under test are when using the simulator.
3- What are the variables influencing the accuracy of blood pressure read by the device?
Patient movement: (shivering, tremors, seizures, and flexing the arm in reaction to cuff pressure)
may interfere with a blood pressure reading and consequently the measurement time will be
increased or reinflation will occur (maximum 3 times). In this condition the measurement may be
unreliable or may be impossible and error message "NIBP EXCESSIVE MOTION" appears.
Low blood pressures: such as those found in patients in shock, produce low pressure amplitudes
that can be difficult to detect and as a result the module may not be able to measure.
Atrial fibrillation (AF) and Arrhythmias: Irregular pulses in terms of occurrence time or amplitude
increase the length of measurement step and time. Sometimes reinflation or even measurement
failure occurs. If the measurement is done, the pressure value may be inaccurate and unreliable.
Cuff size: the cuff bladder length should be approximately 80% of the circumference of the upper
arm and the cuff bladder width should be optimally 40% of the circumference of the upper arm.
Incorrect cuff size may impact the accuracy of NIBP readings.
4- How often should the device be calibrated?
It is recommended to check the device calibration every year and calibrate it, as required.
5- What is age range of individuals for using different device modes?
Neonate: Newborn to 3 years, Pediatric: 3 to 12 years, Adult: >12 years
6- Can we use a cuff produced by another company?
No, using other cuffs may influence the accuracy of NIBP readings.
7- What should we do if NIBP Start button does not function?
Is the Start button pressed immediately after that the monitor has turned on?
and on the monitor. Wait one minute until the monitor boots up and then try again.
Enter NIBP menu and press "Module Start" to ensure correct function of NIBP Start button.
Check whether pressing NIBP Start button will call up the message "NIBP Low Battery".
so, inspect the power connections.
10-16
User Manual
If so, turn off
If
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