US 12,239,440 B2
Probe and pulse photometry system
Katsuyuki Horie, Tokorozawa (JP)
Assigned to NIHON KOHDEN CORPORATION, Tokyo (JP)
Filed by NIHON KOHDEN CORPORATION, Tokyo (JP)
Filed on Aug. 31, 2021, as Appl. No. 17/462,427.
Claims priority of application No. 2020-151260 (JP), filed on Sep. 9, 2020.
Prior Publication US 2022/0071515 A1, Mar. 10, 2022
Int. Cl. A61B 5/1455 (2006.01); A61B 5/00 (2006.01); A61B 5/024 (2006.01)
CPC A61B 5/1455 (2013.01) [A61B 5/02427 (2013.01); A61B 5/7278 (2013.01); A61B 2562/0238 (2013.01); A61B 2562/0242 (2013.01); A61B 2562/046 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A probe configured to be connected to a pulse photometer, the probe comprising:
a first light-emitting portion having a first light-emitting surface from which only first light having a first wavelength is emitted, the first wavelength being used for calculating a concentration of a first light-absorbing substance in blood of a patient;
a second light-emitting portion having a second light-emitting surface from which only second light having a second wavelength that is different from the first wavelength is emitted, the second wavelength being used for calculating the concentration of the first light-absorbing substance;
a third light-emitting portion having a third light-emitting surface from which only third light having a third wavelength that is different from the first wavelength and the second wavelength is emitted, the third wavelength being not used for calculating the concentration of the first light-absorbing substance, and
a fourth light-emitting portion having a fourth light-emitting surface from which fourth light having a fourth wavelength that is different from the first wavelength, the second wavelength, and the third wavelength is emitted, the fourth wavelength being not used for calculating the concentration of the first light-absorbing substance,
wherein a distance between a first reference point of the first light-emitting portion when viewed from a normal line direction of the first light-emitting surface and a second reference point of the second light-emitting portion when viewed from a normal line direction of the second light-emitting surface is shorter than a distance between a third reference point of the third light-emitting portion when viewed from a normal line direction of the third light-emitting surface and the first reference point,
wherein the distance between the first reference point and the second reference point is shorter than a distance between the third reference point and the second reference point, and
wherein a distance between a fourth reference point of the fourth light-emitting portion when viewed from a normal line direction of the fourth light-emitting surface and the third reference point is shorter than a distance between the first reference point or the second reference point and the third reference point.