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Chapter 13 NIBP Monitoring
13.1 Introduction
Measurement method: Oscillometry. It is applicable for adult, pediatric and neonate.
In order to know how the Oscillometry works, we compare it with auscultatory method:
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Auscultatory method: the doctor listens the blood pressure by the stethoscope, to obtain the systolic pressure and
diastolic pressure. When the artery pressure curve is normal, the mean pressure can be calculated by the systolic
pressure and diastolic pressure.
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Oscillometry: the blood pressure can not be listened by the monitor, it measures the vibration amplitude of cuff
pressure. Cuff vibration appears when the blood pressure changes, the cuff pressure corresponding to the
maximum amplitude is the mean pressure, the systolic and diastolic pressure can be calculated by the mean
pressure.
In a word, the auscultatory method measures the systolic and diastolic pressure, then calculates the mean pressure. And
the Oscillometry measures the mean pressure, then calculates systolic and diastolic pressure.
The clinical meaning for NIBP measurement must be determined by the physician.
When measuring during in representative patients group, compare the blood pressure values measured by the device and
auscultatory method, its accuracy meets the requirements specified in IEC 80601-2-30:2009.
13.2 Safety information
WARNING
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Before measuring, make sure that the monitoring mode and cuff type you selected are appropriate for your
patient(adult, pediatric or neonate). As false settings may imperil patient's safety, higher adult settings are
not suitable for pediatric and neonate.
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You must not perform NIBP measurement on patients with sickle-cell disease or under any condition which
the skin is damaged or expected to be damaged.
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For the patients with severe clotting mechanism abnormality, please determine whether automatically
measure the blood pressure according to the clinical evaluation, as the rub position between the limb and
cuff will have the risk of producing hematoma.
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Do not apply the cuff to a limb that has an intravenous infusion or catheter. This could cause tissue damage
around the catheter when infusion is slowed or blocked during cuff inflation.
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NIBP measurement can be performed during electrosurgery and defibrillator discharge, as the device has
the function of protecting burn patients.
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The device can be used in existence of electrosurgical equipment, but when using them together, user(doctor
or nurse) should guarantee the patient's safety.
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Make sure that the air conduit connecting the blood pressure cuff and the monitor is neither blocked nor
tangled.
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If liquid is inadvertently splashed on the device or its accessories, or may enter the conduit or inside the
monitor, please contact with the maintenance department in hospital.
