US 11,918,351 B2
System and method for non-invasive monitoring of hemoglobin
Rodolphe Katra, Blaine, MN (US)
Assigned to Medtronic Monitoring, Inc., San Jose, CA (US)
Filed by Medtronic Monitoring, Inc., San Jose, CA (US)
Filed on Jun. 21, 2021, as Appl. No. 17/352,649.
Application 17/352,649 is a continuation of application No. 15/866,036, filed on Jan. 9, 2018, granted, now 11,039,768.
Prior Publication US 2021/0307661 A1, Oct. 7, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 5/1455 (2006.01); A61B 5/00 (2006.01); A61B 5/02 (2006.01); A61B 5/145 (2006.01)
CPC A61B 5/14546 (2013.01) [A61B 5/0071 (2013.01); A61B 5/02028 (2013.01); A61B 5/1455 (2013.01); A61B 5/14551 (2013.01); A61B 5/0082 (2013.01); A61B 5/6838 (2013.01); A61B 2562/0233 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system comprising:
a medical device comprising:
one or more light sources configured to provide incident light to patient tissue at a first excitation wavelength and a second excitation wavelength; and
a photodetector configured to:
monitor emissions in response to the first excitation wavelength at an emission wavelength; and
monitor emissions in response to the second excitation wavelength at the emission wavelength; and
one or more processors configured to determine a hemoglobin concentration level based on a ratio of emissions at the emission wavelength monitored in response to the first excitation wavelength and emissions at the emission wavelength monitored in response to the second excitation wavelength.