The present invention describes a system, apparatus, and method for detection of disconnection of a device from a patient, such as dislodgment of a device during medical treatments or therapies, using a patient's electrical voltages....http://www.google.com/patents/US7530962?utm_source=gb-gplus-sharePatent US7530962 - Method for detecting the disconnection of an extracorporeal device using a patient's endogenous electrical voltages
