Identification of compromised components in a medical system

A system, comprising:

• a sensor configured to sense a first signal at a first location of an anatomy of a patient;
• and
• one or more processors configured to associate a portion of the first signal with a second signal introduced at a second location of the anatomy of the patient and to determine whether a fault exists in the system based on one or more characteristics of the associated portion of the first signal, wherein the second signal is stimulation delivered to the second location, wherein the sensor is configured to sense a response to the stimulation delivered at the second location, wherein the sensor is an implantable electrode configured to sense a local field potential (LFP) signal, and wherein the one or more processors are configured to:
• determine whether the fault exists in the system based on one or more characteristics of the associated portion of the first signal by identifying an evoked response in the LFP signal and
• compare the identified evoked response in the sensed LFP signal to one or more baseline evoked response signals.

A system, comprising:

• a sensor configured to sense a first signal at a first location of an anatomy of a patient;
• and
• one or more processors configured to associate a portion of the first signal with a second signal introduced at a second location of the anatomy of the patient and to determine whether a fault exists in the system based on one or more characteristics of the associated portion of the first signal, wherein the one or more processors are further configured to:
• receive one or more values indicative of impedance associated with one or more components of the implantable medical device system;
• and
• determine whether any of the received values are out of range;
• and if any of the received values are out of range:
• initiate sensing, via the sensor, of the first signal at the first location of the anatomy of a patient;
• associate the portion of the first signal with a second signal introduced at a second location of the anatomy of the patient;
• and
• determine whether the fault exists in the system based on one or more characteristics of the associated portion of the first signal.

A method of detecting a fault in an implantable medical device system, comprising:

• sensing a first signal via an electrode at a first location of an anatomy of a patient,
• at one or more processors, associating a portion of the first signal with a second signal introduced at a second location of the anatomy of the patient;
• and
• at the one or more processors, determining whether a fault exists in the system based on one or more characteristics of the associated portion of the first signal, wherein one or more of associating a portion of the first signal with the second signal introduced at the second location in the anatomy of the patient and determining whether the fault exists in the system are performed by one or more processors, wherein the second signal is stimulation delivered to the second location;
• and wherein sensing, via an electrode at a first location of an anatomy of a patient, comprises sensing a response to the stimulation delivered at the second location and wherein the first location is a hippocampus of the brain and the second location is an anterior nucleus.