US 12,004,853 B2
Systems and methods for disambiguation of posture
Jeffrey E. Stahmann, Ramsey, MN (US); and John D. Hatlestad, Maplewood, MN (US)
Assigned to Cardiac Pacemakers, Inc., St. Paul, MN (US)
Filed by Cardiac Pacemakers, Inc., St. Paul, MN (US)
Filed on Jul. 23, 2018, as Appl. No. 16/041,923.
Claims priority of provisional application 62/537,047, filed on Jul. 26, 2017.
Prior Publication US 2019/0029567 A1, Jan. 31, 2019
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 5/11 (2006.01); A61B 5/145 (2006.01); A61N 1/05 (2006.01); A61N 1/365 (2006.01); A61N 1/368 (2006.01); A61N 1/37 (2006.01)
CPC A61B 5/1116 (2013.01) [A61B 5/14503 (2013.01); A61B 5/14546 (2013.01); A61B 5/1118 (2013.01); A61B 5/14532 (2013.01); A61B 2562/0219 (2013.01); A61N 1/056 (2013.01); A61N 1/365 (2013.01); A61N 1/368 (2013.01); A61N 1/3702 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A method of operating a medical device system comprising:
measuring position data using an accelerometer;
making a preliminary posture determination of a patient using the position data measured by the accelerometer;
when the preliminary posture determination does not indicate a recumbent posture, then:,
measuring chemical data using an optical chemical sensor; and
normalizing the chemical data by correcting the chemical data in a manner that is proportional to the position data indicated by the accelerometer; and
making a final posture determination of the patient using the position data measured by the accelerometer and the normalized chemical data measured by the optical chemical sensor;
wherein the accelerometer and the optical chemical sensor are disposed within a housing of an implantable medical device.