US 11,666,220 B2
Near-infrared spectroscopy for sensing glycogen in muscle tissue
Brett S. Kirby, Portland, OR (US); Vikram Malhotra, Portland, OR (US); and Roger Schmitz, Hutchinson, MN (US)
Assigned to NIKE, Inc., Beaverton, OR (US)
Appl. No. 16/71,383
Filed by NIKE, Inc., Beaverton, OR (US)
PCT Filed Jan. 26, 2017, PCT No. PCT/US2017/015174
§ 371(c)(1), (2) Date Jul. 19, 2018,
PCT Pub. No. WO2017/132404, PCT Pub. Date Aug. 3, 2017.
Claims priority of provisional application 62/287,286, filed on Jan. 26, 2016.
Prior Publication US 2021/0204816 A1, Jul. 8, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 5/00 (2006.01); G01N 21/3554 (2014.01); G01N 21/31 (2006.01); G01N 21/359 (2014.01); A61B 5/145 (2006.01); A61B 5/1455 (2006.01); G01N 21/47 (2006.01)
CPC A61B 5/0075 (2013.01) [A61B 5/1455 (2013.01); A61B 5/14532 (2013.01); A61B 5/14546 (2013.01); A61B 5/443 (2013.01); A61B 5/4519 (2013.01); A61B 5/4875 (2013.01); A61B 5/6824 (2013.01); A61B 5/7278 (2013.01); A61B 5/742 (2013.01); A61B 5/7475 (2013.01); G01N 21/3151 (2013.01); G01N 21/359 (2013.01); G01N 21/3554 (2013.01); A61B 2562/0238 (2013.01); A61B 2562/0242 (2013.01); A61B 2562/046 (2013.01); G01N 2021/3181 (2013.01); G01N 2021/4709 (2013.01)] 38 Claims
OG exemplary drawing
 
1. A system, comprising:
a light emitter configured to emit light at a first wavelength over a range of approximately 900 to 1000 nanometers and at a second wavelength over a range of approximately 1300 to 1400 nanometers;
a first light detector spaced at a first distance from the light emitter; and
a second light detector spaced at a second distance from the light emitter, the second distance approximately twice the first distance;
a processor configured to determine a glycogen level of muscle tissue as a function of hydration of the muscle tissue based on a relationship between backscatter light from the muscle tissue as detected by the second light detector and backscatter light from non-muscle tissue as detected by the first light detector.