US 11,806,170 B2
Determining tissue oxygen saturation with melanin correction
Kate Leeann Bechtel, Pleasant Hill, CA (US); Kimberly Merritt Shultz, Mountain View, CA (US); Alex Michael Margiott, Fremont, CA (US); and George Edward Kechter, Peoria, IL (US)
Assigned to ViOptix, Inc., Newark, CA (US)
Filed by ViOptix, Inc., Newark, CA (US)
Filed on Nov. 3, 2020, as Appl. No. 17/088,520.
Application 17/088,520 is a division of application No. 15/494,444, filed on Apr. 21, 2017, granted, now 10,820,863.
Claims priority of provisional application 62/326,673, filed on Apr. 22, 2016.
Claims priority of provisional application 62/326,644, filed on Apr. 22, 2016.
Claims priority of provisional application 62/326,630, filed on Apr. 22, 2016.
Claims priority of provisional application 62/325,919, filed on Apr. 21, 2016.
Prior Publication US 2021/0045695 A1, Feb. 18, 2021
Int. Cl. A61B 5/1455 (2006.01); A61B 5/00 (2006.01); A61B 5/1495 (2006.01); A61B 5/103 (2006.01)
CPC A61B 5/7271 (2013.01) [A61B 5/1032 (2013.01); A61B 5/1495 (2013.01); A61B 5/14551 (2013.01); A61B 5/14552 (2013.01); A61B 5/4312 (2013.01); A61B 5/7239 (2013.01); A61B 5/742 (2013.01); A61B 5/0002 (2013.01); A61B 5/4869 (2013.01); A61B 2560/0209 (2013.01); A61B 2560/0223 (2013.01); A61B 2562/046 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method comprising:
providing a handheld oximeter device comprising a processor, memory, display, battery, and probe tip comprising source structures and detector structures, wherein the memory is coupled to the processor and stores first simulated reflectance curves and second simulated reflectance curves, the display is coupled to the processor, and the source structures and detector structures are coupled to the processor, and the battery is coupled to the processor, memory, and display;
from the source structures, emitting light into a tissue to be measured, wherein the tissue to be measured comprises eumelanin and pheomelanin;
at the detector structures, receiving light from the tissue in response to the emitted light, wherein the received light comprises a melanin absorption component due to the eumelanin and pheomelanin of the tissue;
in the processor, using the received light to calculate an oxygen saturation value for the tissue and determine an indication of a skin color and a melanin content value of the tissue to be measured;
using the determined melanin content value to select one of the first simulated reflectance curves or the second simulated reflectance curves stored in the memory by comparing the determined indication of the skin color against the melanin content value associated with each of the simulated reflectance curves and the determined indication of the skin color and the calculated oxygen saturation value, obtaining a melanin-corrected oxygen saturation value for the tissue, wherein the melanin-corrected oxygen saturation value accounts for the melanin absorption component; and
displaying the melanin-corrected oxygen saturation value on the display.