US 12,109,024 B2
Pulse oximetry device, system and method
Fernando De Benedetto, Chieti (IT); Alberto Visconti, Chieti (IT); Marco Raimondi, Chieti (IT); and Matteo Aventaggiato, Chieti (IT)
Assigned to LIFE METER SRL, Chieti (IT)
Appl. No. 17/045,272
Filed by LIFE METER SRL, Chieti (IT)
PCT Filed Apr. 5, 2019, PCT No. PCT/EP2019/058734
§ 371(c)(1), (2) Date Oct. 5, 2020,
PCT Pub. No. WO2019/193196, PCT Pub. Date Oct. 10, 2019.
Claims priority of application No. 1805703 (GB), filed on Apr. 5, 2018.
Prior Publication US 2021/0169382 A1, Jun. 10, 2021
Int. Cl. A61B 5/00 (2006.01); A61B 5/0205 (2006.01); A61B 5/1455 (2006.01); A61B 5/1495 (2006.01); G16H 10/60 (2018.01); G16H 40/40 (2018.01); G16H 40/67 (2018.01); G16H 50/30 (2018.01); G16H 50/70 (2018.01); A61B 5/024 (2006.01)
CPC A61B 5/1495 (2013.01) [A61B 5/0205 (2013.01); A61B 5/14552 (2013.01); A61B 5/6802 (2013.01); A61B 5/6833 (2013.01); G16H 10/60 (2018.01); G16H 40/40 (2018.01); G16H 40/67 (2018.01); G16H 50/30 (2018.01); G16H 50/70 (2018.01); A61B 5/02433 (2013.01); A61B 2560/0214 (2013.01); A61B 2560/0238 (2013.01); A61B 2560/0456 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method of taking pulse oximetry measurements, the method comprising:
providing a first, reference pulse-oximeter adapted to measure reference Oxygen saturation (SpO2) values on a basis of a first predetermined pulse oximetry parameter calculated from a first, reference Photoplethysmography (PPG) signal measured by the reference pulse-oximeter on a non-wrist body portion sufficiently perfused with arterial blood of each of one or more test subjects;
using said first, reference pulse-oximeter, measuring reference SpO2 values for multiple measurements carried out on the non-wrist body portion of each of the one or more test subjects;
from the reference SpO2 values, obtaining a calibration relationship that expresses SpO2 as a function of the first predetermined pulse oximetry parameter;
providing a second, bracelet-type pulse oximetry device adapted to acquire SpO2 a second PPG signal on a wrist of a target subject, wherein the device is adapted to calculate therefrom a second predetermined pulse oximetry parameter;
using the second, bracelet-type pulse oximetry device, performing one or more acquisitions of the second PPG signal on the wrist of the target subject;
calculating from the one or more acquisitions of the second PPG signal one or more corresponding values of the second predetermined pulse oximetry parameter;
converting said one or more corresponding values of the second predetermined pulse oximetry parameter into measured SpO2 values using said calibration relationship.