US 12,226,206 B2
Robust fractional saturation determination
Philip Perea, Irvine, CA (US); Ammar Al-Ali, San Juan Capistrano, CA (US); and Massi Joe E. Kiani, Laguna Niguel, CA (US)
Assigned to Masimo Corporation, Irvine, CA (US)
Filed by MASIMO CORPORATION, Irvine, CA (US)
Filed on Jul. 15, 2021, as Appl. No. 17/377,170.
Application 17/377,170 is a continuation of application No. 16/387,352, filed on Apr. 17, 2019, granted, now 11,089,982.
Application 16/387,352 is a continuation of application No. 15/795,007, filed on Oct. 26, 2017, granted, now 10,299,709, issued on May 28, 2019.
Application 15/795,007 is a continuation of application No. 13/791,633, filed on Mar. 8, 2013, granted, now 9,808,188, issued on Nov. 7, 2017.
Application 13/791,633 is a continuation in part of application No. 13/650,730, filed on Oct. 12, 2012, abandoned.
Claims priority of provisional application 61/703,688, filed on Sep. 20, 2012.
Claims priority of provisional application 61/547,001, filed on Oct. 13, 2011.
Prior Publication US 2022/0039706 A1, Feb. 10, 2022
Int. Cl. A61B 5/1455 (2006.01); A61B 5/00 (2006.01)
CPC A61B 5/14551 (2013.01) [A61B 5/7203 (2013.01); A61B 5/7221 (2013.01)] 16 Claims
OG exemplary drawing
 
9. A patient monitoring method comprising:
storing, by a memory device, a signal generated by a noninvasive physiological sensor monitoring a patient, the signal being responsive to a physiological condition of the patient;
determining, by one or more hardware processors, a functional oxygen saturation measurement, a methemoglobin measurement, and a carboxyhemoglobin measurement from the signal;
determine a dishemoglobin measurement from the signal without using the methemoglobin measurement and the carboxyhemoglobin measurement;
determining, by the one or more hardware processors, a first fractional oxygen saturation measurement from the signal using a first algorithm, the first algorithm using as inputs from the functional oxygen saturation measurement, the methemoglobin measurement, and the carboxyhemoglobin measurement;
determining, by the one or more hardware processors, a second fractional oxygen saturation measurement from the signal using a second algorithm different from the first algorithm, the second algorithm using as inputs the functional oxygen saturation measurement and the dishemoglobin measurement; and
determining, by the one or more hardware processors, an output fractional oxygen saturation measurement for presentation to a user from the first fractional oxygen saturation measurement and the second fractional oxygen saturation measurement.