US 12,433,492 B2
Bleeding sensor for a patients gastrointestinal tract
Alexander Barnes Baldwin, Santa Monica, CA (US); and Yi-Kai Lo, Culver City, CA (US)
Assigned to NICHE BIOMEDICAL, INC., Los Angeles, CA (US)
Appl. No. 18/554,527
Filed by NICHE BIOMEDICAL, INC., Los Angeles, CA (US)
PCT Filed Apr. 6, 2022, PCT No. PCT/US2022/023579
§ 371(c)(1), (2) Date Oct. 9, 2023,
PCT Pub. No. WO2022/221104, PCT Pub. Date Oct. 20, 2022.
Claims priority of provisional application 63/173,561, filed on Apr. 12, 2021.
Prior Publication US 2024/0081654 A1, Mar. 14, 2024
Int. Cl. A61B 5/02 (2006.01); A61B 5/00 (2006.01)
CPC A61B 5/02042 (2013.01) [A61B 5/0086 (2013.01); A61B 5/4222 (2013.01); A61B 5/6861 (2013.01); A61B 5/7225 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A sensor comprising:
a planar substrate having a top face;
at least three light emitters on the top face of the planar substrate and each configured to emit light of different primary wavelengths;
a centrally-located light detector with a broad sensitivity spectrum on the top face of the planar substrate with the at least three light emitters, wherein the centrally-located light detector is centrally-located with respect to the at least three light emitters, wherein each of the at least three light emitters is located radially around the centrally-located light detector and at least two of the at least three light emitters are positioned on opposite sides of the centrally-located light detector;
a wide angle lens position over the centrally-located light detector;
a gap between each of the at least three light emitters and the centrally-located light detector and configured to accept contents of a patient's gastrointestinal tract; and
at least three mirrors, each positioned above one of the at least three light emitters and configured to reflect the light of the different primary wavelength emitted by the one of the at least three light emitters and direct the reflected light through the contents of the patient's gastrointestinal tract in the gap and into the wide angle lens,
wherein the wide angle lens focuses the reflected light that travelled through the contents of the patient's gastrointestinal tract in the gap from each of the at least three mirrors onto the centrally-located light detector,
wherein the centrally-located light detector is configured to detect light signal from the at least three light emitters that have passed through the contents of the patient's gastrointestinal tract in the gap and to detect blood within the contents of the patient's gastrointestinal tract in the gap based on intensities of the light signals detected.