Smiths Medical 2120, Руководство оператора

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References and Troubleshooting
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Accuracy Test Results
In this device, as with all infusion pumps, the motion of the pumping mechanism and variations in
individual disposables cause short-term fluctuations in rate accuracy. The following curves show typical
performance of the pump system in two ways:
1. A flow versus time graph during the stabilization period (start-up curves).
2. The accuracy of fluid delivery of particular time periods, or observation windows, is measured
(trumpet curves).
The start-up curve displays flow rate continuously from the start of the infusion. The curve visually
represents flow rate uniformity. Trumpet curves are derived from the sixth hour of this data. The tests
were performed per IEC 60601-2-24 standard.
Over long observation windows, short term fluctuations have minimal effect on accuracy as represented
by the flat part of the curve. As the observation window is reduced, short term fluctuations have an
increasing effect as represented by the “mouth” of the trumpet. Being aware 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,
both the trumpet curve and drug half-life should be taken into consideration.
Start-up curve over the stabilization period
Low flow rate (10 mL/hr)
Intermediate flow rate (150 mL/hr)
T (min)
Set Point 150 mL/hr
Flo
w (mL/hr)
0 10 20 30 40 50 60 70 80 90 100 110
0
30
60
90
120
150
180
0 30 60 90 120 150 180 210 240 270 300
T (min)
Flo
w
(m
L/
hr
)
0
2
4
6
8
10
12