Patent Document ID: 9895544
Application ID: 15382853
Patent Flag: 1

Claim One:
1. A medical device for computing an estimate of a physiological variable, the medical device comprising: a sensing module configured to receive a physiological signal and measure an event of the physiological signal; a memory configured to store a long-term metric of the event measurement, wherein the long-term metric corresponds to a time interval correlated to a response time of the physiological variable to changes in the event; and a control unit configured to: initialize a value of the long-term metric of the event measurement; update the long-term metric in the memory using a previous long-term metric of the event measurement and a current measurement of the event; detect a need for computing the physiological variable, wherein detecting the need for computing the physiological variable estimate comprises detecting a need for therapy delivery; compute the estimate of the physiological variable using the updated long-term metric; a therapy control unit configured to determine a therapy control parameter using the physiological variable estimate; and a telemetry module configured to transmit the determined therapy control parameter.