CN-121985981-A - Balloon, light irradiation device and treatment method

Abstract

The balloon of the present disclosure is insertable into a living body, and includes an expansion portion defining a central axis extending in an insertion direction from a proximal side toward a distal side, the expansion portion including a transmission layer capable of transmitting light emitted from the inside to the outside, and a light shielding layer covering the transmission layer, the expansion portion including a window region in which the transmission layer is not covered by the light shielding layer, and a light shielding region in which the transmission layer is covered by the light shielding layer, the window region of the expansion portion including a 1 st window portion and a2 nd window portion in an expanded state, the 2 nd window portion being disposed on the proximal side separately from the 1 st window portion and being inclined with respect to the central axis than the 1 st window portion.

Inventors

• Fuji University
• Mo Yuanda

Assignees

• 泰尔茂株式会社

Dates

Publication Date

20260505

Application Date

20240924

Priority Date

20230928

Claims (14)

1. 1. A balloon capable of being inserted into a living body, wherein, The balloon is provided with an expansion portion defining a central axis extending in an insertion direction from a proximal side toward a distal side, The expansion part is provided with: a transmission layer capable of transmitting light emitted from the inside to the outside, and A light shielding layer covering the transmissive layer, the light transmittance of the light shielding layer being smaller than that of the transmissive layer, The expansion part is provided with: A window region in which the transmissive layer is not covered by the light shielding layer, and A light shielding region in which the transmissive layer is covered with the light shielding layer, The window region of the expansion portion includes, in an expanded state, a1 st window portion and a2 nd window portion, and the 2 nd window portion is disposed on a proximal side with respect to the 1 st window portion, and is inclined with respect to the central axis with respect to the 1 st window portion.
2. 2. The balloon of claim 1, wherein, The 1 st window is substantially parallel or parallel to the central axis.
3. 3. The balloon of claim 1 or 2, wherein, The 2 nd window is provided over the entire circumferential region around the central axis.
4. 4. The balloon of claim 1 or 2, wherein, In the expansion portion, the distal side of the 1 st window portion is constituted only by the light shielding region.
5. 5. The balloon of claim 1 or 2, wherein, The expansion part is provided with: An expansion body part having a cylindrical shape surrounding the central axis, and An expansion proximal portion connected to a proximal side of the expansion main body portion and inclined in a manner of approaching the central axis toward the proximal side, The 1 st window portion is disposed on the expansion body portion, The 2 nd window is disposed at the expanded proximal portion.
6. 6. The balloon of claim 5, wherein, The expansion proximal portion protrudes proximally from the expansion body portion in a hemispherical shape.
7. 7. The balloon of claim 1 or 2, wherein, The 1 st window portion is provided in a limited angular range not throughout the entire circumference in a circumferential direction of the expansion portion about the central axis.
8. 8. The balloon of claim 7, wherein, At least a part of the 2 nd window portion is arranged at a position different from the 1 st window portion in the circumferential direction.
9. 9. A light irradiation device, wherein, The light irradiation device includes: the balloon of claim 1 or 2, and A tubular body that defines an accommodation space therein, the accommodation space accommodating or being capable of accommodating a light irradiation section for emitting the light, The balloon covers a radial circumference of the tubular body.
10. 10. A method of treatment, wherein the method of treatment uses the balloon of claim 1, The treatment method includes a balloon position adjustment step of adjusting the position of the 1 st window while visually checking the 1 st window through the 2 nd window.
11. 11. The method of treatment according to claim 10, wherein, In the balloon position adjustment step, the balloon is moved in a direction parallel to the central axis, thereby adjusting the position of the 1 st window.
12. 12. The method of treatment according to claim 10 or 11, wherein, In the balloon position adjustment step, the balloon is rotated in a circumferential direction around the central axis, thereby adjusting the position of the 1 st window.
13. 13. A method of treatment, wherein the method of treatment uses the balloon of claim 1, The treatment method comprises the following steps: an image pickup device insertion step of inserting an image pickup device into the living body; a balloon insertion step of inserting the balloon into the living body via a passage of the image pickup device or in parallel with an outer surface of the image pickup device; An expanding step of expanding the balloon in the living body; A lens position adjustment step of bringing a lens at the tip of the imaging device into proximity with the 2 nd window of the balloon; a balloon position adjustment step of adjusting the position of the 1 st window portion so that a predetermined area to be irradiated with light in the living body coincides with the position of the 1 st window portion while visually checking the 1 st window portion from the 2 nd window portion, and And a light irradiation step of irradiating the living body with the light in a state where the light irradiation target area coincides with the position of the 1 st window.
14. 14. A method of treatment, wherein the method of treatment uses the balloon of claim 1, The treatment method comprises the following steps: an image pickup device insertion step of inserting an image pickup device into the living body; a balloon insertion step of inserting the balloon into the living body via a passage of the image pickup device or in parallel with an outer surface of the image pickup device; A 1st expansion step of expanding the balloon by adjusting the balloon to a 1st expansion amount in the living body; A lens position adjustment step of bringing a lens at the tip of the imaging device into proximity with the 2 nd window of the balloon; A balloon position adjustment step of adjusting a position of the 1 st window of the balloon adjusted to the 1 st expansion amount so that a light irradiation scheduled area in the living body coincides with a position of the 1 st window while visually checking the 1 st window from the 2 nd window; A 2 nd expansion step of expanding the balloon by adjusting the balloon to a 2 nd expansion amount larger than the 1 st expansion amount in the living body after the balloon position adjustment step, and And a light irradiation step of irradiating the living body with the light in a state where the light irradiation scheduled area coincides with the position of the 1 st window portion after the 2 nd expansion step.

Description

Balloon, light irradiation device and treatment method Technical Field The present disclosure relates to balloons, light irradiation devices, and methods of treatment. Background A light irradiation device used for irradiating therapeutic light to abnormal tissue is known. Such a light irradiation device is disclosed in patent document 1. The light irradiation device described in patent document 1 includes a balloon coated with a reflective material, and can improve the distribution efficiency and uniformity of light in a treatment region. Prior art literature Patent literature Patent document 1 Japanese patent laid-open publication No. 2005-46640 Disclosure of Invention Technical problem to be solved by the invention In order to achieve a stable light therapeutic effect, a light irradiation device for irradiating a target portion such as an abnormal tissue with therapeutic light is provided to clarify a light irradiation region and to more uniformly maintain the irradiation intensity of light in the light irradiation region. Patent document 1 describes a balloon catheter apparatus as a light irradiation device that distributes light more uniformly and efficiently over the entire light irradiation area. However, in the case of the balloon of the light irradiation device described in patent document 1, since the light irradiation region is defined by coating the end portion on the near side (near side) with the reflective material, it is difficult for the operator to visually confirm the light irradiation region of the light irradiation device from the near side (near side) when light is irradiated from the inside of the living body to the target portion such as the abnormal tissue, and it is sometimes difficult to perform reliable treatment. The present disclosure aims to provide a balloon capable of visually checking a light irradiation region from the near side in a living body, a light irradiation device provided with the balloon, and a treatment method using the balloon. Technical scheme for solving problems (1) The balloon as aspect 1 of the present disclosure can be inserted in a living body, The balloon is provided with an expansion portion defining a central axis extending in an insertion direction from a proximal side to a distal side, The expansion part comprises: a transmission layer capable of transmitting light emitted from the inside to the outside, and A light shielding layer covering the transmissive layer and having a smaller transmittance for the light than the transmissive layer, The expansion part comprises: a window region in which the transmissive layer is not covered with the light shielding layer, and A light shielding region in which the transmissive layer is covered with the light shielding layer, The window region of the expansion portion includes a1 st window portion and a2 nd window portion in an expanded state, and the 2 nd window portion is disposed on a near side of the 1 st window portion and is inclined with respect to the central axis than the 1 st window portion. (2) The balloon according to an aspect of the present disclosure is the balloon according to (1) above, wherein the 1 st window is substantially parallel or parallel to the central axis. (3) In one embodiment of the present disclosure, in the balloon according to (1) or (2), the 2 nd window is provided over the entire circumferential region around the central axis. (4) The balloon according to one aspect of the present disclosure is the balloon according to any one of (1) to (3), wherein the distal side of the 1 st window portion is formed of only the light shielding region in the expansion portion. (5) The balloon according to one aspect of the present disclosure is the balloon according to any one of the above (1) to (4), The expansion part comprises, in an expanded state: an expansion body part having a cylindrical shape surrounding the central axis, and An expansion proximal portion connected to a proximal side of the expansion main body portion and inclined so as to be closer to the central axis toward the proximal side, The 1 st window portion is disposed on the expansion body portion, The 2 nd window is disposed at the expansion proximal portion. (6) The balloon according to an aspect of the present disclosure is the balloon according to (5) above, wherein the expansion proximal portion protrudes in a hemispherical shape from the expansion main body portion in a proximal direction. (7) The balloon according to one aspect of the present disclosure is the balloon according to any one of (1) to (6), wherein the 1 st window is provided in a limited angular range not extending over the entire circumference in the circumferential direction of the expansion portion around the central axis. (8) In one embodiment of the present disclosure, in addition to the balloon described in (7), at least a part of the 2 nd window is disposed at a position different from the 1 st window in the circumferential direction. (9) The