Monitoring Noninvasive Blood Pressure; Introducing The Oscillometric Noninvasive Blood Pressure Measurement - Philips Avalon FM20 Instructions For Use Manual

Monitoring Noninvasive Blood
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Pressure
This fetal monitor uses the oscillometric method for the noninvasive blood pressure measurement. In
adult 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 sample population. For the
auscultatory reference, the fifth Korotkoff sound was used to determine the diastolic pressure.
A physician must determine the clinical significance of the measurement information.
Introducing the Oscillometric Noninvasive Blood
Pressure 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
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 in cases of 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 in cases of severe blood clotting disorders because of the
risk of hematoma in the limb fitted with the cuff.
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