US 12,336,844 B2
Monitoring physiological parameters
Stephen Morgan, Nottingham (GB); Barrie Hayes-Gill, Nottingham (GB); Serhiy Korposh, Nottingham (GB); and Ricardo Correia, Nottingham (GB)
Assigned to The University of Nottingham, Nottingham (GB)
Appl. No. 17/250,821
Filed by THE UNIVERSITY OF NOTTINGHAM, Nottingham (GB)
PCT Filed Sep. 3, 2019, PCT No. PCT/GB2019/052454
§ 371(c)(1), (2) Date Mar. 5, 2021,
PCT Pub. No. WO2020/049291, PCT Pub. Date Mar. 12, 2020.
Claims priority of application No. 1814465 (GB), filed on Sep. 5, 2018.
Prior Publication US 2021/0251571 A1, Aug. 19, 2021
Int. Cl. A61B 5/00 (2006.01); A61B 5/1455 (2006.01); D03D 15/547 (2021.01); D04B 1/16 (2006.01); D05C 17/00 (2006.01); G02B 6/02 (2006.01)
CPC A61B 5/6804 (2013.01) [A61B 5/14552 (2013.01); A61B 5/6843 (2013.01); D03D 15/547 (2021.01); D04B 1/16 (2013.01); D05C 17/00 (2013.01); G02B 6/02176 (2013.01); A61B 2562/0238 (2013.01); D10B 2401/20 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A system comprising:
an optical fibre assembly configured to measure one or more physiological parameters of an individual; and
a pressure sensor configured to measure a contact pressure of the optical fibre assembly on the individual;
wherein the pressure sensor comprises:
an optical fibre comprising:
a transducer fibre Bragg grating;
a matrix, wherein the transducer fibre Bragg grating is embedded in the matrix and the matrix is configured to cause longitudinal strain in the transducer fibre Bragg grating in response to the matrix being subject to a transverse load; and
a temperature compensation fibre Bragg grating received in a clearance fit in a cavity of a rigid support member isolating the temperature compensation fibre Bragg grating from a transverse load;
wherein the optical fibre assembly is configured to measure the physiological parameter only when contact pressure of the optical fibre assembly measured by the pressure sensor is determined to be within a predefined range; and
wherein the temperature compensation fibre Bragg grating is free to expand and contract independently of the rigid support member.