Rotatable Tubular Member Window for Medical Light Irradiation
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Solution Overview
Problem
Existing light irradiating medical devices for PDT or optical ablation face challenges in adjusting the position for irradiation without damaging the light guiding tool, as the position is often determined by the balloon or tubular member, requiring complex movements that can harm the optical fiber.
Innovation Solution
A light irradiating medical device with a rotatable first tubular member having a window for output light, allowing adjustment of the irradiation position in the circumferential or longitudinal direction without rotating the light guiding tool, which includes an optical fiber with a cladding-absent portion, enabling precise positioning while preventing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the position for irradiation is determined by the treatment window provided to the balloon, then the irradiation position can be controlled, but the catheter needs to be moved or rotated which complicates the treatment process
Solution Approach 1:
The device is segmented into multiple functional components: a balloon for positioning, a tubular member with a treatment window for light delivery, and a light source. This segmentation allows independent optimization of each component's function, enabling precise irradiation control without complex catheter manipulation.
Solution Approach 2:
The tubular member with the treatment window acts as an intermediary between the balloon positioning system and the light source. It translates the balloon's positional control into precise light delivery without requiring further catheter movement or rotation, simplifying the overall treatment process.
2Adaptability or versatility
If the light guiding material needs to be moved or rotated to adjust irradiation position, then the irradiation position can be adjusted, but the light guiding material may be damaged
Solution Approach 1:
Instead of moving or rotating the light guiding material to adjust position, the invention inverts the approach by keeping the light guiding material stationary and adjusting the position of the treatment window relative to it. This protects the optical fiber from damage while achieving the same positioning flexibility.
Solution Approach 2:
The tubular member is designed to be movable relative to the stationary light guiding material, allowing dynamic adjustment of the treatment window position. This dynamic configuration enables position adaptation without subjecting the fragile optical fiber to mechanical stress from movement or rotation.
3Adaptability or versatility
If the irradiation device is rotated to adjust position, then the irradiation position can be changed, but the irradiation device may be damaged
Solution Approach 1:
The irradiation device is segmented into a stationary light source section and a movable tubular member section. This segmentation allows the tubular member to be adjusted independently without rotating the entire irradiation device, protecting it from damage while maintaining position adaptability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables flexible and precise adjustment of the irradiation position without rotating the light guiding tool, thereby preventing damage and simplifying the treatment process.
Implementation Method 1
a light guiding tool disposed in a lumen of the first tubular member and movable in the longitudinal axis direction, the light guiding tool including an optical fiber extending in the longitudinal axis direction
Implementation Method 2
the window allowing passage therethrough of output light from the light guiding tool
Data Source
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AI summary
A light irradiating medical device (1) comprising: a shaft (2) having a first end and a second end in a longitudinal axis direction thereof and having a lumen (3) extending in the longitudinal axis direction; a first tubular member (10) disposed in the lumen (3) of the shaft (2) and rotatable about a rotation axis parallel to the longitudinal axis direction of the shaft (2), the first tubular member (10) having a window (12) located in a part of a peripheral wall of a distal portion; and a light guiding tool disposed in a lumen (11) of the first tubular member (10) and movable in the longitudinal axis direction, the light guiding tool including an optical fiber (21) extending in the longitudinal axis direction, the optical fiber (21) including a core (22), a cladding (23) coating a radially outer portion of the core (22), and a cladding-absent portion (24) located at a part of a distal portion of the core (22), and the window (12) allowing passage therethrough of output light from the light guiding tool.