Extravasation detection technique

Details Extravasation detection technique Extravasation detection technique

1997-11-26

1999-09-07

Smith, Ruth S.

Surgery

Diagnostic testing

Measuring electrical impedance or conductance of body portion

604 50, 604 51, 604 66, A61B 505

Patent

active

059479108

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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patent: 5026348 (1991-06-01), Venegas
patent: 5246008 (1993-09-01), Mueller
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