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Vital Signs Monitor User Manual
Chapter 13 Monitoring NIBP
13.1 Overview
This monitor uses the oscillometric method for measuring NIBP. It can be used for adult,
pediatric and neonatal patients. It is also intended for use with pregnant, including pre-eclamptic
patients.
Oscillometric devices measure the amplitude of pressure changes in the occluding cuff as the cuff
deflates from above systolic pressure. The amplitude suddenly increases as the pulse breaks
through the occlusion in the artery. As the cuff pressure decreases further, the pulsations increase
in amplitude, reach a maximum (which approximates to the mean pressure), and then diminish.
The blood pressure measurements determined with this device comply with the American
National Standard for Electronic or Automated Sphygmomanometers (ISO 81060-2:2013) in
relation to mean error and standard deviation. In clinical investigation method with a reference
sphygmomanometer, the fifth Korotkoff sound was used to determine adult diastolic pressure,
and the fourth Korotkoff sound was used to determine pediatric diastolic pressure.
The invasive blood pressure is used to determine the neonate pressure in clinical investigation,
and the arterial reference sites include umbilical artery, arteria cruralis, axillary artery, brachial
artery, dorsalis pedis, and radial artery.
13.2 NIBP Safety Information
1
Do not measure NIBP on patients with sickle-cell disease or any condition where skin
damage has occurred or is expected.
2
Do not measure NIBP on the arm of the same side with a mastectomy.
3
Use clinical judgement to decide whether to perform frequent blood pressure
measurements on patients with severe blood clotting disorders because of the risk of
hematoma in the limb fitted with the cuff.
4
Do not apply the cuff to a limb that has an intravenous infusion or catheter in place.
This could cause tissue damage around the catheter when infusion is slowed or
blocked during cuff inflation.
5
Do not attach the cuff to a limb being used for IV infusions as the cuff inflation can
block the infusion, potentially causing harm to patient.
6
Do not apply the cuff to a limb where intravascular access or therapy, or an
arterio-venous (A-V) shunt is present, otherwise, it may result in injury to the patient.
7
Ensure that the correct patient type is selected before performing measurements. Do
not apply the higher adult inflation, overpressure limits and measurement duration for
neonatal patients. Not using the neonate mode on a neonatal patient can block the
blood flow, potentially causing harm to the patient.
8
Make sure that the air conduit connecting the blood pressure cuff and the monitor is
neither blocked nor tangled.
WARNING
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Monitoring NIBP
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