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10Monitoring NBP
This monitor uses the oscillometric method for measuring NBP. In adult and pediatric mode, the
blood pressure measurements determined with this device comply with the American National
Standard for Electronic or Automated Sphygmomanometers (ANSI/AAMI SP10-1992) in relation to
mean error and standard deviation, when compared to intra-arterial or auscultatory measurements
(depending on the configuration) in a representative patient population. For the auscultatory reference,
the fifth Korotkoff sound was used to determine the diastolic pressure.
In neonatal mode, the blood pressure measurements determined with this device comply with the
American National Standard for Electronic or Automated Sphygmomanometers (ANSI/AAMI SP10-
1992) in relation to mean error and standard deviation, when compared to intra-arterial measurements
in a representative patient population.
The NBP measurement is suitable for use in the presence of electrosurgery and during the discharge of
a cardiac defibrillator according to IEC 601-2-30/EN 60601-2-30.
A physician must determine the clinical significance of the NBP information.
Introducing the Oscillometric NBP Measurement
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.
Studies show that, especially in critical cases (arrhythmia, vasoconstriction, hypertension, shock),
oscillometric devices are more accurate and consistent than devices using other noninvasive measuring
techniques.
WARNING Patient Category: Select the correct patient category setting for your patient. Do not apply the higher
adult inflation, overpressure limits and measurement duration to neonatal patients.
Intravenous infusion: Do not use the NBP cuff on a limb with an intravenous infusion or arterial
catheter in place. This could cause tissue damage around the catheter when the infusion is slowed or
blocked during cuff inflation.
Skin Damage: Do not measure NBP on patients with sickle-cell disease or any condition where skin
damage has occurred or is expected.
Unattended measurement: Use clinical judgement to decide whether to perform frequent unattended
blood pressure measurements on patients with severe blood clotting disorders because of the risk of
hematoma in the limb fitted with the cuff.