IP Library › Granted Patent US 12,245,852
Granted Patent B2
US 12,245,852 · App. 18/123,832 · Granted Mar 11, 2025

Optical sensors for use in vital sign monitoring

Inventors: Jim Moon (Portland, OR); Devin McCombie (San Diego, CA); Matt Banet (San Diego, CA); Marshal Dhillon (San Diego, CA)
Assignee: SOTERA WIRELESS, INC.
A61B5/1116A61B5/1118A61B5/14551A61B5/25A61B5/6826A61B5/6838A61B5/7207A61B5/0002A61B5/02055A61B5/02225A61B5/0245A61B5/0816A61B5/1117A61B5/7225A61B5/7239A61B5/746A61B2560/0412A61B2560/0462A61B2560/0468A61B2562/0219
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Quick Facts
Patent No.
US 12,245,852
App. No.
18/123,832
Granted
Mar 11, 2025
Kind
B2
Abstract

The invention provides a body-worn system that continuously measures pulse oximetry and blood pressure, along with motion, posture, and activity level, from an ambulatory patient. The system features an oximetry probe that comfortably clips to the base of the patient's thumb, thereby freeing up their fingers for conventional activities in a hospital, such as reading and eating. The probe secures to the thumb and measures time-dependent signals corresponding to LEDs operating near 660 and 905 nm. Analog versions of these signals pass through a low-profile cable to a wrist-worn transceiver that encloses a processing unit. Also within the wrist-worn transceiver is an accelerometer, a wireless system that sends information through a network to a remote receiver, e.g. a computer located in a central nursing station.

Claims (5)

1. An optical sensor configured to determine an optical signal indicative of a photoplethysmography waveform and calculate therefrom peripheral arterial blood oxygen saturation (SpO2) pulse rate values, the sensor comprising:

a flexible housing configured to wrap around the base of the patient's thumb and position over the interior base of the thumb proximate to a princeps pollicis artery, the flexible housing comprising (i) a first light source that emits optical radiation, wherein the first light source comprises a first substantially planar surface, (ii) a photodetector configured to detect the optical radiation and to generate the optical signal, wherein the photodetector is positioned on a substrate comprising a second substantially planar surface, (iii) circuitry configured to receive the optical signal and covert the optical signal into a photoplethysmograph waveform; and (iv) a plurality of living hinges, the first and second substantially planar surfaces are supported by the flexible housing such that the first substantially planar surface is separated from the second substantially planar surface by an included angle between 35-55 degrees, wherein the included angle is an angle formed between a first line drawn parallel to the first substantially planar surface and a second line drawn parallel to the second substantially planar surface, wherein the flexible housing is an approximately semicircular housing with the plurality of living hinges radially spaced apart from each other along a circumference of the approximately semicircular housing; and

a processing unit configured to receive the photoplethysmograph waveform and determine therefrom time-dependent pulsatile alternating current (AC) and non-pulsatile direct current (DC) signals indicative of a heartbeat-induced pulse and calculate the SpO2 and pulse rate values.

2. An optical sensor according to claim 1 , wherein the processing unit further comprises a transceiver configured to wirelessly transmit the SpO2 and pulse rate values to a remote display.

3. An optical sensor according to claim 1 , wherein the processing unit further comprises an accelerometer.

Continuity (18)
Continuation 13292923 · Nov 9, 2011
Continuation In Part 12650374 · Dec 30, 2009
Continuation In Part 12559413 · Sep 14, 2009
Continuation In Part 12487283 · Jun 18, 2009
Continuation In Part 12171886 · Jul 11, 2008
Continuation In Part 12138194 · Jun 12, 2008
Continuation In Part 12138194 · Jun 12, 2008
Provisional Application 61218062 · Jun 17, 2009
Provisional Application 61218057 · Jun 17, 2009
Provisional Application 61218060 · Jun 17, 2009
Provisional Application 61218055 · Jun 17, 2009
Provisional Application 61218061 · Jun 17, 2009
Provisional Application 61218059 · Jun 17, 2009
Provisional Application 61073681 · Jun 18, 2008
Provisional Application 60983198 · Oct 28, 2007
Provisional Application 60949052 · Jul 11, 2007
Provisional Application 60943464 · Jun 12, 2007
Related Publication 20230225633A1 · Jul 20, 2023
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