Surgery – Diagnostic testing – Structure of body-contacting electrode or electrode inserted...
Reissue Patent
2005-02-08
2005-02-08
Smith, Ruth S. (Department: 3737)
Surgery
Diagnostic testing
Structure of body-contacting electrode or electrode inserted...
C600S384000, C600S393000, C600S396000, C600S547000
Reissue Patent
active
RE038695
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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Goodman Jack
Zimmet Arthur
Alston & Bird LLP
E-Z-EM, Inc.
Smith Ruth S.
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