Extravasation detection technique
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United States of America Patent
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Sep 7, 1999
Issued Date -
N/A
app pub date -
Nov 26, 1997
filing date -
Jan 14, 1994
priority date (Note) -
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Abstract
The technique for detecting extravasation during the injection of fluid into a patient involves the establishment of a baseline representing impedance at the zone of the injection prior to the injection starting. Extravasation is signaled when at least two characteristics appear. First is that the impedance varies from the baseline more than a predetermined amount in more than a predetermined number of discreet time slots called epochs herein. Second is that, the rate of change of the impedance, which is called the slope herein, is consistently greater than a predetermined amount.
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