SELF CALIBRATING EXTRAVASATION DETECTION SYSTEM

摘要

An extravasation detection system has an extravasation sensor and a calibration sensor for measuring first and second parameters, respectively, during a test injection and during a prescribed injection. The first parameter is indicative of whether or not there is extravasation in the subject. The second parameter is a condition that can be correlated with the first parameter. A processor receives signals from the sensors and uses the test injection signals to determine one or more criteria that it later uses in determining whether or not the prescribed injection produces extravasation in the subject. In one embodiment, the processor determines a relationship relating the first parameter to the second parameter and uses the expression to calculate an expected result for measurement of the first parameter during the prescribed injection absent extravasation. If the processor determines that there is extravasation, it activates an alarm system and/or interrupts the injection.