Patent ID: 8852099

Claim:
A system for deriving relative physiologic measurement values, comprising: an implantable medical device (“IMD”) operable to determine a physiologic parameter value within a patient's body and communicate the physiologic parameter value outside the patient's body, the IMD including a sensor operable to obtain a measured physiologic parameter value, wherein the measured physiologic parameter value comprises a value of a parameter measured within the patient's body, and including a transmitter adapted to communicate the physiologic parameter value outside the patient's body, wherein the physiologic parameter value comprises the measured physiologic parameter value or an absolute physiologic parameter value, wherein the absolute physiologic parameter value is based on the measured physiologic parameter value; an external computing device including communication circuitry configured to wirelessly receive the physiologic parameter value and an integral sensor configured to sense an ambient condition value, wherein the ambient condition value comprises a value of the parameter measured outside the patient's body, the external computing device comprising a single device operable to both: wirelessly receive the physiologic parameter value from the IMD; and sense the ambient condition value; the external computing device or a backend computing system operable to calculate a relative physiologic parameter value from the ambient condition value and the physiologic parameter value; and the external computing device or the backend computing system operable to store the calculated relative physiologic parameter value.