GE Dash 3000, Operator'S Manual

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10-2 Dash™ 3000/4000/5000 2000966-386D
Monitoring NBP
Introduction
Overview
Automatic non-invasive blood pressure monitoring uses the oscillometric
measurement method. The oscillometric method uses a sensitive transducer which
measures cuff pressure and minute pressure oscillations within the cuff to determine
the mean pressure and calculate the systolic and diastolic pressures.
A parameter window display updates every second. There is no waveform.
708B
The reference blood pressure is the intra-arterial blood pressure for neonatal, pediatric
and adult populations.
After inflating the cuff, the monitor begins to deflate and the oscillations in the cuff is
measured. Finally, systolic, mean, and diastolic pressure are calculated and the
display is updated.
The monitor deflates the cuff one step each time it detects two pulsations of relatively
equal amplitude. The time between deflation steps depends on the frequency of these
matched pulses (pulse rate of the patient). However, if the monitor is unable to find
any pulse within several seconds, it will deflate to the next step. The process of
finding two matched pulses at each step provides artifact rejection due to patient
movement and greatly enhances the accuracy. In stat mode, some steps only require
one pulse.
1 Systolic value
2 Diastolic value
3 Pulse rate value
4 Time of last measurement (24 hour clock)
5 Cuff size
6 Automatic determination message
7 Mean value or cuff inflation pressure during a measurement
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3
2
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