Trumpet And Start-Up Curves; Important - IVAC P5000 Mk II Mode D'emploi

In this instrument, as with all infusion systems, the action of the pumping mechanism and
variations in individual syringes 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), and 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 fluctuations have 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 half-life of the drug being infused and the degree of inter vascular integration,
the clinical effect cannot be determined from the trumpet curves alone.
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 IEC60601-2-24-1998.
Start-up and trumpet curves may not be indicative of operation under negative
pressure.
Differences in factors such as size and plunger force in compatible syringes
produced by other manufacturers can cause variations in accuracy and trumpet
curves as compared to those represented. Additional curves for compatible
syringes are available upon written request.
For applications where flow uniformity is a concern, rates of 1.0ml/hr or above
are recommended.
5001FAOPT71 ISS 8.0

Trumpet and Start-Up Curves

Important:

Specifications
Trumpet Curves
Start-up Curves
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