Patent ID: 11911177
Assignee: MEDTRONIC, INC.
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A  G

Claim 0:
1. A medical device system comprising:
an implantable medical device comprising one or more sensors, wherein the implantable medical device is configured to be implanted underneath a skin of a patient so that the implantable medical device and the one or more sensors occupy a desired orientation over a period of time greater than seven days, wherein a length of the implantable medical device is greater than a depth of the implantable medical device and a width of the implantable medical device is greater than the depth of the implantable medical device so that the implantable medical device and the one or more sensors are configured to remain in the desired orientation following implantation throughout the period of time greater than seven days,
wherein the one or more sensors comprise:
sensing circuitry; and
a set of electrodes located on a first major surface of the implantable medical device opposite a second major surface of the implantable medical device, wherein the first major surface faces target tissue of the patient when the implantable medical device occupies the desired orientation over the period of time greater than seven days, and
wherein the sensing circuitry is configured to continuously generate, based on a physiological signal sensed from the target tissue via the set of electrodes, an electrical signal that indicates a parameter of the patient over the period of time greater than seven days; and

processing circuitry configured to:
receive data indicative of a user selection of a reference time indicating a start of a treatment;
determine a plurality of parameter values of the parameter based on a portion of the electrical signal corresponding to a time window including the reference time, wherein each parameter value of the plurality of parameter values represents a measurement of the parameter for a respective time interval during the time window;
identify, based on a first set of parameter values of the plurality of parameter values occurring before the reference time, a reference parameter value;
identify a set of difference values, wherein each difference value of the set of difference values represents a difference between the respective parameter value of a second set of parameter values and the reference parameter value, wherein the second set of parameter values occur after the reference time;
determine a sum of the set of difference values;
determine a delta value which represents a difference between the reference parameter value and a target parameter value;
calculate a parameter change value by determining a ratio of the sum of the set of difference values to the delta value;
determine, based on the parameter change value, whether an improvement or a worsening of the patient has occurred responsive to the treatment; and
generate information indicating whether an improvement or a worsening of the patient has occurred responsive to the treatment.