DATREND Systems vPad-IV, Operating Manual

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vPad-IV OPERATORS MANUAL
The inclusion of trumpet data in the summary is optional. Not all flow rate tests are eligible for trumpet
analysis as there must be a sufficient amount of recorded data in memory to enable the necessary
calculations. The IEC standard requires a minimum of one hour of data. A complete trumpet curve which
includes results for all five observation windows will need at least 32 minutes of recorded data. If the
selected period of analysis spans less than 5 minutes, the app will inform the user and will not proceed with
the trumpet analysis. See Section 4.6.4 below for instructions on adjusting the trumpet time span.
Enabling the trumpet analysis will add the following details to the test summary:
Trumpet Data
Time span
The start and end time of trumpet analysis
Window size
Duration of moving observation window, as follows:
2 min 5 min 11 min 19 min 31 min
Window errors
Error of maximum flow rate calculated for the window size
Error of minimum flow rate calculated for the window size
Overall error Error of average flow rate over the entire test duration
4.6.3 Occlusion Test Summary
During an occlusion pressure test, vPad-IV monitors the fluid pressure in the IV line and records the peak
measured value. The test summary therefore includes the peak pressure as well as the time at which it
occurred. The summary also shows the pressure and time at the end of the test; depending on how the test
was stopped, this may be simply the time and pressure at which the automatic test ended, or alternatively the
time and pressure when the test was stopped manually in response to an audio-visual alarm from the device
under test.
4.6.4 Graphical Summary
The
Graph
button of the test summary menu (
Figure 39
on page 52) shows a plot of all measurements
recorded over the duration of the test, which is similar to the realtime plots described for test graph displays
(see Section 4.5.5 and
Figure 36
on page 48).
Upon choosing a graph type, users can save a PNG image of the graph by clicking the Save Graph button
( Figure 41 ). The button displays an image preview which includes a dialog that prompts for a filename. A
default name is generated which has a similar format as a Test Record file. In addition to the device ID and
date/time stamp, the default filename includes a suffix which identifies the type of graph and the vPad-IV
channel it was obtained from. After editing the filename, if needed, click
Done
on the keyboard to save the
graph.
Operation/Chapter 4
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