Patent ID: 7632234
Filing Date: 2009-12-15
Classification: A61B,A61N

Abstract:
1. An implantable sensor system for determining the presence or amount of an analyte in a patient, comprising: a. a sensor element comprising a biological recognition element associated with a portion or portions of a transducer, the biological recognition element being capable of specifically binding to a substance in the patient in an amount related to the presence or amount of the substance, wherein the substance is BNP or a marker related to BNP, and wherein when the substance is bound to the biological recognition element a detectable signal is produced; and b. a controller associated with the sensor element to measure the detectable signal and relate the amount of the detectable signal measured with the presence or amount of the substance present in the patient; wherein the sensor element is adapted to be implanted within the intracardiac circulatory system of the patient's heart and wherein the controller is adapted to compare measured levels of the substance to preselected levels stored in the controller and the controller includes a circuit to vary the AV interval of a cardiac resynchronization therapy device in response to measured levels of the substance.