US 12,220,585 B2
Methods and apparatus for reducing current drain in a medical device
Todd J. Sheldon, North Oaks, MN (US); Vincent P. Ganion, Blaine, MN (US); Greggory R. Herr, Blaine, MN (US); Michael L. Hudziak, Stillwater, MN (US); Juliana E. Pronovici, New Hope, MN (US); and Paul R. Solheim, Blaine, MN (US)
Assigned to Medtronic, Inc., Minneapolis, MN (US)
Filed by Medtronic, Inc., Minneapolis, MN (US)
Filed on Dec. 3, 2021, as Appl. No. 17/542,328.
Application 17/542,328 is a continuation of application No. 16/681,278, filed on Nov. 12, 2019, granted, now 11,207,526.
Claims priority of provisional application 62/767,009, filed on Nov. 14, 2018.
Prior Publication US 2022/0088393 A1, Mar. 24, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A61N 1/365 (2006.01); A61N 1/372 (2006.01); A61N 1/378 (2006.01)
CPC A61N 1/36542 (2013.01) [A61N 1/37276 (2013.01); A61N 1/37282 (2013.01); A61N 1/378 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A medical device comprising:
a motion sensing circuit comprising a motion sensor for sensing a motion signal, the motion sensor having a plurality of axes, each axis of the plurality of axes configured to produce an axis signal, the motion sensing circuit configured to sense the motion signal by:
sampling at least one axis signal of the motion sensor;
starting a blanking period corresponding to a portion of a cardiac cycle, the blanking period having an expiration time;
suspending sampling of the at least one axis signal of the motion sensor during at least a portion of the blanking period that is less than an entirety of the blanking period; and
restarting the sampling of the at least one axis signal during the blanking period and before the expiration time of the blanking period;
a control circuit configured to:
receive the motion signal;
detect a cardiac event from the motion signal after the expiration time of the blanking period; and
a pulse generator configured to generate a pacing pulse in response to the control circuit detecting the cardiac event from the motion signal.