US 12,357,842 B2
Light irradiation device and light irradiation system
Toshihiko Tsukamoto, Owariasahi (JP); and Kazuhide Sato, Owariasahi (JP)
Assigned to ILLUMI MEDICAL INC., Owariasahi (JP)
Filed by ILLUMI MEDICAL INC., Owariasahi (JP)
Filed on Dec. 2, 2024, as Appl. No. 18/966,106.
Application 18/966,106 is a continuation of application No. PCT/JP2023/008008, filed on Mar. 3, 2023.
Prior Publication US 2025/0090861 A1, Mar. 20, 2025
Int. Cl. A61N 5/06 (2006.01); A61N 5/067 (2006.01)
CPC A61N 5/062 (2013.01) [A61N 5/0603 (2013.01); A61N 5/067 (2021.08); A61N 2005/0602 (2013.01); A61N 2005/063 (2013.01); A61N 2005/0643 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A light irradiation device for medical use that has an elongated shape and is configured to emit light from a most distal end after the light irradiation device was inserted into a lumen of a living body, the light irradiation device comprising:
an optical fiber that is configured to transmit light emitted by a light source to a tip portion of the optical fiber, wherein
the tip portion of the optical fiber is formed in a bent portion that is bent with respect to an axial direction of a base portion to which the tip portion is connected,
a most distal end of the bent portion has a cut surface facing in a tip direction to serve as a most distal end surface of the light irradiation device from which light is emitted,
light having exited the most distal end surface is emitted in the tip direction of the bent portion to an outside of the light irradiation device by emitting the light from the most distal end surface of the bent portion in the optical fiber,
the tip direction is a direction intersecting the axial direction of the base portion,
the optical fiber includes a stiffening portion in at least a portion of an area where the bent portion is located,
the stiffening portion is fixed to the bent portion of the optical fiber while allowing the light to be emitted in the tip direction from the most distal end surface of the bent portion, and
an angle of the bent portion with respect to the axial direction of the base portion of the optical fiber is stabilized by increasing a stiffness of the area in the optical fiber where the stiffening portion is disposed as compared to the optical fiber without the stiffening portion.