Accutorr 3 Operator's Manual 5-1
5 Monitoring NIBP
5.1 Overview
The monitor uses the oscillometric method to measure non-invasive blood pressure
(NIBP). This measurement can be used for adult, pediatric, and neonatal patients. To
understand how this method works, we will compare it to the auscultative method.
With auscultation, clinicians listen to the Korotkoff sounds to determine blood pressure
when using the auscultatory method.
Since the monitor cannot hear the Korotkoff sounds to determine the blood pressure, it
measures cuff pressure oscillation amplitudes. Oscillations are caused by blood pressure
pulses against the cuff. This is the most accurate parameter measured by the oscillometric
method.
The auscultation determines systolic and diastolic pressures. The oscillometric method
calculates the systolic and diastolic pressures.
As specified by IEC 80601-2-30, NIBP measurements can be performed during
electro-surgery and discharge of defibrillator.
NIBP diagnostic significance must be decided by the clinician who performs the
measurement.
Blood pressure measurements determined with this device are equivalent to those
obtained by a trained observer using the cuff/stethoscope auscultatory method or an
intra-arterial blood pressure measurement device, within the limits prescribed by the
American National Standard, Manual, electronic, automated sphygmomanometers, or
standards of IEC80601-2-30, EN1060-1, EN1060-3, EN1060-4 and SP10.
5.2 Safety
WARNING
During NIBP measurement, the inflated cuff applies pressure on the application
site. The clinician determines if NIBP measurement is suitable for the patient.
Be sure to select the correct patient category setting for your patient before
measurement. Incorrect patient category selection may present a safety hazard.
Do not measure NIBP on patients with sickle-cell disease or on the limb where
skin damage has occurred or is expected.
Use clinical judgement to determine 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.
Do not use the NIBP 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.
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