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Light irradiation apparatus and light irradiation system

A technology of light irradiation and equipment, applied in the field of light irradiation equipment and light irradiation system, can solve the problems of insufficient light permeability and inability to apply cancer, etc.

Pending Publication Date: 2022-05-03
ASAHI INTECC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The predetermined wavelength region including 690nm exemplified above is also called the spectral window of the living body, and although it is a wavelength region in which the light absorbed by the components of the living body is less than other wavelength regions, the light from the body surface Insufficient penetration of light during irradiation, so there is a problem that it cannot be applied to deep-seated cancers in the body

Method used

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  • Light irradiation apparatus and light irradiation system
  • Light irradiation apparatus and light irradiation system
  • Light irradiation apparatus and light irradiation system

Examples

Experimental program
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no. 1 approach ＞

[0056] Figure 1Is an explanatory diagram illustrating the structure of the light irradiation system according to the first embodiment. The light irradiation system is a system that is inserted into the lumen of a living body called vascular system, lymph gland system, biliary system, urethral system, airway system, digestive organ system, secretory gland and reproductive organ, and irradiates light from the lumen of the living body toward the living tissue. The irradiation system can be used, for example, in PDT(Photodynamic Therapy) and NIR-PIT (Near-infrared Photoimmunotherapy). In the following embodiments, laser is exemplified as an example of light, but it is not limited to laser. For example, LED light and white light may be used to form a light irradiation system. The light irradiation system includes a catheter 1 and a light irradiation device 2 inserted into the catheter 1 for use. at Figure 1 A catheter 1 and a light irradiation device 2 are shown individually.

[0057]...

no. 2 approach ＞

[0080] Figure 8 Is an explanatory diagram illustrating the structure of the light irradiation system according to the second embodiment. The light irradiation system of the second embodiment is provided with a conduit 1A and a light irradiation device 2A with different structures from those of the first embodiment.

[0081] 1A is provided with a light-transmitting part 139A instead of the light-transmitting part 139. The light-transmitting portion 139A is a plate-like member with an arc shape, and is embedded in a part of the rotating shaft 110 and joined with the rotating shaft 110. Therefore, the light transmitting part 139A of the second embodiment is provided at a part of the circumferential direction, and transmits the light inside the rotating shaft 110 to the outside at a part of the circumferential direction. In addition, the light-transmitting portion 139A can be formed of the same material as the light-transmitting portion 139.

[0082] The light irradiation device 2A i...

no. 3 approach ＞

[0086] Figure 10 Is a cross-sectional structure illustrating the front end piece 220B of the third embodiment ( Figure 1 : the sectional structure of line C-C). The light irradiation system of the third embodiment is provided with the catheter 1 described in the first embodiment and the light irradiation device 2B having a structure different from that of the first embodiment.

[0087] The light irradiation device 2B is provided with a front end piece 220B instead of the front end piece 220. As in the first embodiment, the front end piece 220B is a substantially cylindrical member extending in the longitudinal direction of the light irradiation device 2B. A groove 221 extending in the longitudinal direction (axis O direction) is formed on the outer circumferential surface of the front end piece 220B. The groove 221 extends linearly from the front end face 220e of the front end piece 220B to the base end face ( Figure 1 : +X-axis end face), and gas (e.g., air) can flow between the...

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Abstract

A long light irradiation device inserted into a catheter for use is provided with: a light irradiation unit provided on the tip side of the light irradiation device and irradiating light to the outside; and a large-diameter portion provided closer to the tip side than the light irradiation portion and having an outer diameter larger than the outer diameter of the light irradiation portion.

Description

Technical field [0001] The invention relates to a light irradiation device and a light irradiation system. technical background [0002] In cancer treatment, surgical, radiological and pharmaceutical (chemical) methods are used alone or in combination, and each technology has been developed in recent years. However, there are still many cancers that haven't found a satisfactory treatment technology, and further development of treatment technology is expected. As one of the cancer treatment technologies, there is a known method called PDT(PhotodynamicTheerapy). In PDT, after intravenous injection of photosensitive substances, active oxygen is generated in cancer cells by light irradiation, and cancer cells die (for example, see Non-Patent Document 1). However, PDT has low selectivity in the integration of photosensitive substances to cancer cells, and the size of side effects caused by its absorption by normal cells has become a problem. As a therapeutic technology, PDT has not be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61N5/06
CPCA61N5/0613A61N2005/0659A61N5/0601A61N5/062A61N2005/063A61N2005/0632G02B6/0008A61N2005/0643A61N2005/0664
Inventor 塚本俊彦桂田裕子
Owner ASAHI INTECC CO LTD
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