US 12,440,683 B2
Medical device and method for estimating time between voltage levels of a power source
Jenna M. S. Pender, Saint Paul, MN (US)
Assigned to Medtronic, Inc., Minneapolis, MN (US)
Filed by Medtronic, Inc., Minneapolis, MN (US)
Filed on Jan. 12, 2024, as Appl. No. 18/411,882.
Application 18/411,882 is a continuation of application No. 17/112,514, filed on Dec. 4, 2020, granted, now 11,890,482.
Claims priority of provisional application 62/951,095, filed on Dec. 20, 2019.
Prior Publication US 2024/0149068 A1, May 9, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. A61N 1/378 (2006.01); A61N 1/02 (2006.01); A61N 1/365 (2006.01); A61N 1/37 (2006.01); A61N 1/372 (2006.01); A61N 1/05 (2006.01)
CPC A61N 1/3706 (2013.01) [A61N 1/025 (2013.01); A61N 1/36521 (2013.01); A61N 1/36542 (2013.01); A61N 1/36585 (2013.01); A61N 1/37247 (2013.01); A61N 1/378 (2013.01); A61N 1/0573 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A medical device system comprising:
a power source;
therapy delivery circuitry configured to deliver a therapy;
sensing circuitry configured to sense a physiological signal;
a memory configured to store a power capacity difference between a first voltage of the power source and a second voltage of the power source; and
control circuitry configured to:
control the sensing circuitry to sense the physiological signal;
control the therapy delivery circuitry to deliver the therapy based on at least the sensed physiological signal;
measure a voltage of the power source;
determine that the measured voltage of the power source has reached the first voltage;
determine an elapsed time since the measured voltage reached the first voltage;
determine a current drain required from the power source by the sensing circuitry for at least sensing the physiological signal;
determine an estimated power source longevity based on the current drain and the power capacity difference;
adjust the estimated power source longevity by the elapsed time; and
generate an output based on the adjusted estimated power source longevity; and
the memory further configured to store data corresponding to the adjusted estimated power source longevity in response to the output generated by the control circuitry.