Pump Accuracy - CME BodyGuard 575 Color Vision Operator's Manual

Pump Accuracy

The following graphs and curves were derived from testing described in IEC60601-2-24. Testing was
performed under normal conditions at room temperature (72
and room temperature may cause changes in the accuracy of the pump.
Start-up Curves
The Start-up curves represent continuous flow versus operating time for two hours from the start
of the infusion. They exhibit the delay in onset of delivery due to mechanical compliance and
provide a visual representation of uniformity. Trumpet curves are derived from the second hour
of this data. Tests performed according to IEC 60601-2-24 standard.
Trumpet and Flow Rate
With the BodyGuard®, as with all infusion systems, the action of the pumping mechanism and variations
cause short term fluctuations in rate accuracy.
The following curves show typical performance of the system in two ways:
1. The accuracy of fluid delivery over various time periods is measured (trumpet curves).
2. The delay in onset of fluid flow when infusion commences (start up curves).
Trumpet curves are named for their characteristic shape. They display discrete data averaged over
particular time periods or "Observation windows", not continuous data versus operating time. Over long
observation windows, short-term fluctuation has little effect on accuracy as represented by the flat part of
the curve. As the observation window is reduced, short-term fluctuations have greater effects as
represented by the "mouth" of the trumpet.
Knowledge of system accuracy over various observation windows may be of interest when certain drugs
are being administered. Short-term fluctuations in rate accuracy may have clinical impact depending on
the shelf life of the drug being infused and the degree of inter-vascular integration. The clinical effect
cannot be determined from the trumpet curves alone.
Software ver. CVPCA30E_1
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F). Any deviations from normal conditions
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