Abstract:
A light source apparatus includes a primary light source that emits primary light, a diffusing member that diffuses and converts the primary light into diffused light, a reflection portion that regularly reflects or diffuse-reflects and converts the diffused light into reflected light, and an emission portion that emits the reflected light to an outside. A portion of the primary light is converted in an order of the diffused light and the reflected light and emitted to the outside from the emission portion in a state of the reflected light.
Abstract:
A gastrointestinal tract constricting method according to the present invention aims to constrict the gastrointestinal tract by contracting a desired region of the gastrointestinal tract by a simple and low-invasive procedure. The method includes forming spreading blocks while observing the gastrointestinal tract with an endoscope inserted into the gastrointestinal tract, the spreading blocks being formed at a position between a mucosa layer and a muscle layer and on both sides of a target region, which is to be damaged by a substance, in a circumferential direction of the gastrointestinal tract so that the spreading blocks block spreading of the substance in the circumferential direction of the gastrointestinal tract to prevent spreading of the substance to an outer side of the target region, and supplying the substance to a mucosal surface of the target region or to the position between the mucosa layer and the muscle layer after formation of the spreading blocks.
Abstract:
An endoscopic treatment method includes: inserting an endoscope into a digestive tract; forming a damaged area in at least a portion of the digestive tract along a circumferential direction by performing cauterizing while keeping a mucosal layer by observing with the endoscope; and forming an incomplete stenosis in the digestive tract, while restoring the damaged area, wherein the damaged area is formed by causing damage to a mucosal base layer, the mucosal base layer having an interface that contacts a submucosal layer.
Abstract:
A medical device includes a snare wire advanceable and retractable inserted through a channel in an insertion portion that is inserted through an endoscope; a substantially tubular cap member including a first portion and a second portion connected to a distal end of the insertion portion, the cap member having an annular distal end surface, the first portion being attachable to the distal end of the insertion portion in phase with the channel, and the cap member having an internal space formed by the first portion and the second portion; and a guide member being linearly extended along an internal surface of the distal end side of the cap member at a side of the second portion, the guide member being configured to guide the snare wire to form a loop and to restrict a retraction of the snare wire toward the side of the insertion portion.
Abstract:
A light source device includes an excitation light source, a light guide member and a wavelength conversion unit. The wavelength conversion unit includes an optical element disposed on an optical axis and with which excitation light emitted from the light guide member is irradiated to reflect, scatter, or diffract the excitation light, a wavelength conversion member disposed on an optical path of the excitation light reflected, scattered, or diffracted by the optical element to convert the excitation light into wavelength converted light and an emission opening portion that emits the wavelength converted light converted by the wavelength conversion member.
Abstract:
A light source device includes an excitation light source, a light guide member and a wavelength conversion unit. The wavelength conversion unit includes an optical element disposed on an optical axis and with which excitation light emitted from the light guide member is irradiated to reflect, scatter, or diffract the excitation light, a wavelength conversion member disposed on an optical path of the excitation light reflected, scattered, or diffracted by the optical element to convert the excitation light into wavelength converted light and an emission opening portion that emits the wavelength converted light converted by the wavelength conversion member.