US 12,082,945 B2
Systems and methods for low power pulse oximetry
Matti VeliTapani Huiku, Espoo (FI); Sakari Matias Lamminmaki, Espoo (FI); and Kari Vaino Piipponen, Kerava (FI)
Assigned to GE Precision Healthcare LLC, Wauwatosa, WI (US)
Filed by GE Precision Healthcare LLC, Wauwatosa, WI (US)
Filed on Jan. 10, 2023, as Appl. No. 18/152,406.
Application 18/152,406 is a continuation of application No. 17/099,673, filed on Nov. 16, 2020, granted, now 11,564,630.
Application 17/099,673 is a continuation of application No. 16/180,942, filed on Nov. 5, 2018, granted, now 10,874,352, issued on Dec. 29, 2020.
Prior Publication US 2023/0157642 A1, May 25, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 5/1455 (2006.01); A61B 5/00 (2006.01); A61B 5/024 (2006.01)
CPC A61B 5/7203 (2013.01) [A61B 5/14552 (2013.01); A61B 5/02416 (2013.01); A61B 2560/0209 (2013.01); A61B 2560/029 (2013.01); A61B 2562/0238 (2013.01); A61B 2562/12 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for an optical sensor, comprising:
illuminating a light emitter of the optical sensor according to set sensor parameters, the sensor parameters set based on hardware noise or external interference characterization and light transmission or reflection of a tissue contributing to a signal output by the optical sensor, the sensor parameters including current drive parameters of the light emitter, wherein the signal output further includes external interference noise; and
adjusting the current drive parameters of the light emitter to maintain a target signal to noise ratio of the signal output by the optical sensor, including setting the current drive parameters to reach a target emitter or detector current by selecting at least one of a current pulse amplitude, current pulse length, and current pulse frequency based on external interference.