Extravasation detection electrode patch

Details Extravasation detection electrode patch Extravasation detection electrode patch

1997-10-24

1999-10-12

Smith, Ruth S.

Surgery

Diagnostic testing

Structure of body-contacting electrode or electrode inserted...

600384, 600393, 600396, 600547, A61B 504

Patent

active

059647035

ABSTRACT:
A medical extravasation device has an electrode patch that can attach to the skin for sensing electrical information. Tissue impedance is calculated from the electrode patch signals. The patch has elongate pick-up electrodes inboard of elongate energizing electrodes. The measuring zone determined by the elongate space between the pick-up electrodes enhances sensitivity and specificity. The presence of an extravasation is determined by interpreting the tissue impedance measurement. The method for determining the extravasation includes a first step of determining a pre-injection baseline measurement of the tissue impedance. Then, the tissue impedance is monitored during the procedure itself. A predetermined amount of change in tissue impedance is determined to indicate an extravasation.

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