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Ipump Pain Management System Operator’s Manual
9-8
CD07-19-E4-766
How Trumpet Graphs are Created
The Trumpet Curve graphs were developed in accordance with data collection and manipulation methods
defined in IEC 60601-2-24.
The Trumpet Curve graphs were created in the following manner.
Q
Fluid from the device is collected at the set flow rates over 25 hours.
Q
Every 15 minutes, the cumulative weight of the fluid is recorded.
Q
The data from the collection period are divided into observation or time windows and the flow rate
accuracy is determined for each window.
Q
The maximum and minimum deviations from the set flow rate for various window sizes (15, 60, 150,
330, 570, and 930 minutes) are plotted on a graph.
Q
These plotted points are connected to form the trumpet-shaped lines.
Oct02_0719E4766.book Page 8 Friday, August 3, 2007 1:46 PM