US 11,786,305 B2
Light treatment system and light treatment method
Toshiaki Suzuki, Hino (JP)
Assigned to OLYMPUS CORPORATION, Tokyo (JP)
Filed by OLYMPUS CORPORATION, Tokyo (JP)
Filed on Feb. 23, 2021, as Appl. No. 17/182,304.
Application 17/182,304 is a continuation of application No. PCT/JP2018/040613, filed on Oct. 31, 2018.
Prior Publication US 2021/0196380 A1, Jul. 1, 2021
Int. Cl. A61B 18/20 (2006.01); A61B 18/24 (2006.01); A61B 18/00 (2006.01); A61B 18/22 (2006.01)
CPC A61B 18/24 (2013.01) [A61B 2018/00517 (2013.01); A61B 2018/206 (2013.01); A61B 2018/2261 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A light treatment system, comprising:
a light source configured to generate light having a wavelength of 690 nm;
a probe including an optical fiber configured to propagate the light from the light source, and a diffuser having a cylindrical shape and provided at a distal end of the optical fiber, the diffuser being configured to diffuse the light from a surface of the cylindrical shape;
a balloon catheter into which the probe is inserted, the balloon catheter being configured to be inserted into the bladder, the balloon catheter including a distal end portion configured to be spherically dilated in the bladder; and
a liquid that includes light scattering particles and fills an inside of the distal end portion when the distal end portion is dilated, the liquid having a scattering coefficient μ′s equal to or larger than 5/R, where R is a maximum radius of the distal end portion when dilated;
wherein the maximum radius of the distal end portion is between 35 mm and 70 mm, inclusive of 35 mm and 70 mm;
a diameter of the light scattering particles is within a range of 1 μm to 4 μm, inclusive of 1 μm and 4 μm; and
a specific gravity of the light scattering particles is within a range of 0.9 to 1.4 inclusive of 0.9 and 1.4.