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In this pump, 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 delay in onset of fluid flow when infusion commences (start-up
curves), and 2) the accuracy of fluid delivery over various time periods is measured (trumpet curves).
The start-up curves represent continuous flow versus operating time 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 per IEC/EN60601-2-24 standard.
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, therefore the clinical effect cannot be
determined from the trumpet curves alone.
A
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 1.0 ml/h or above are recommended.
Start-up Trend. BD Plastipak 50ml @ 0.1ml/h
Start-up Trend. BD Plastipak 50ml @ 1.0ml/h
Start-up Trend. BD Plastipak 50ml @ 5.0ml/h
Trumpet Curves & Start-up Curves
Time (mins)
Time (mins)
Time (mins)
1000DF00005 Iss. 2
Trumpet Curve. BD Plastipak 50ml @ 0.1ml/h
Observation Window (mins)
Trumpet Curve. BD Plastipak 50ml @ 1.0ml/h
Observation Window (mins)
Trumpet Curve. BD Plastipak 50ml @ 5.0ml/h
Observation Window (mins)
36/44
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