Light Irradiation Device With Fluid-Displacing Large-Diameter Portion
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Solution Overview
Problem
Existing light irradiation devices used in conjunction with catheters for medical procedures, such as PDT and NIR-PIT, inadvertently irradiate body fluids within the catheter, leading to blood coagulation and damage to normal cells, and this issue is not adequately addressed in existing devices.
Innovation Solution
A light irradiation device with a large diameter portion and a groove on its outer surface is designed to push out body fluids from the catheter, combined with a catheter having a through-hole for fluid ejection and a light transmitting portion, allowing smooth insertion and alignment of the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If light irradiation is performed from the body surface, then the treatment area is limited to superficial cancers, but the procedure is simple and non-invasive
Solution Approach 1:
The light irradiation device is inserted into a catheter that has been positioned in the body cavity, allowing the irradiation source to reach deep-seated tumors without requiring complex surgical exposure. The device nests within the catheter structure, simplifying the overall procedure while enabling deep tissue treatment
2Volume of moving object
If light irradiation device is inserted into catheter, then deep cancer treatment is enabled, but body fluid inside catheter is inadvertently irradiated causing coagulation
Solution Approach 1:
A large diameter portion is provided on the light irradiation device that pushes out body fluid from the catheter before the light irradiation portion reaches the target site. This preliminary action of fluid displacement prevents the subsequent harmful irradiation of body fluid during the treatment procedure
Solution Approach 2:
The light irradiation device is divided into distinct functional portions: a large diameter portion for fluid displacement and a light irradiation portion for cancer treatment. This segmentation allows each component to perform its specific function independently, preventing harmful side effects while maintaining treatment effectiveness
3Device complexity
If conventional light irradiation device is used, then simple structure is maintained, but device flexibility and adaptability are limited
Solution Approach 1:
The light irradiation device incorporates multiple functional portions in a single structure: the large diameter portion serves both as a structural element and a fluid displacement mechanism, while the light irradiation portion performs cancer treatment. This multi-functionality increases device adaptability without proportionally increasing structural complexity
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
This configuration effectively prevents light irradiation of body fluids, reducing coagulation and tissue damage while enhancing device design flexibility and procedural range.
Implementation Method 1
a light irradiation portion being provided on a distal end side of the light irradiation device and outputting irradiation light to an outside
Data Source
AI summary
A light irradiation device having an elongated shape is inserted into a catheter. The light irradiation device includes a light irradiation portion provided on a distal end side of a light irradiation device for outputting irradiation light to outside, and a large diameter portion positioned distal to the light irradiation portion and having an outer diameter larger than an outer diameter of the light irradiation portion.