Expandable Flat Portion Forming Section for Varicose Vein Occlusion
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Solution Overview
Problem
Existing methods for treating varicose veins, such as RF ablation, face challenges in uniform TLA fluid injection and device recanalization due to uneven vessel contraction and distal end entrapment during device retraction.
Innovation Solution
A treatment device with an expandable flat portion forming section that deforms the body lumen into a flat shape at the distal end, allowing for efficient occlusion and preventing recanalization by positioning the treatment site at the distal end, where the device can be easily withdrawn without catching on the treated area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the distal end portion of the treatment device is positioned on the distal side of the flattened portion of the blood vessel, then the device can effectively treat the blood vessel, but the distal end portion may contact and get caught on the flat portion during retraction, causing recanalization
Solution Approach 1:
The flat portion forming section is designed to form the flat portion at a location distal to where the distal end portion of the treatment device will be positioned. This preliminary positioning ensures that when the device is retracted, the distal end portion does not contact the flat portion, preventing recanalization while maintaining effective treatment.
2Ease of manufacture
If TLA fluid is injected unevenly into the periphery of the blood vessel, then the injection process is simpler, but the contraction of the blood vessel becomes uneven, preventing sufficient ablation
Solution Approach 1:
The flat portion forming section acts as an intermediary structure that receives TLA fluid and distributes it uniformly along the blood vessel periphery. This intermediary mechanism ensures even contraction of the blood vessel wall, enabling sufficient ablation while maintaining injection simplicity.
3Productivity
If the treatment device is retracted after forming the flat portion, then the device can be removed from the blood vessel, but the distal end portion may get caught on the flat portion, resulting in recanalization
Solution Approach 1:
The flat portion forming section is positioned and configured in advance to form the flat portion at a location that is distal to the distal end portion of the treatment device. This preliminary spatial arrangement ensures that during retraction, the distal end portion cannot contact or get caught on the flat portion, preventing recanalization and ensuring durable occlusion.
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
The device ensures efficient occlusion of the body lumen by uniformly deforming the vessel and preventing recanalization, ensuring effective treatment with reduced risk of treatment failure.
Implementation Method 1
a flat portion forming section which is supported by the elongated body, is expandable widthwise on a more distal side than the elongated body, and forms the body lumen with a flat portion at a distal portion of the flat portion forming section upon an expansion of the flat portion forming section within the body lumen
Implementation Method 2
an administering section which administers, toward the flat portion formed by the flat portion forming section, a treatment which acts to occlude the flat portion
Data Source
AI summary
Disclosed is a treatment device for occluding a body lumen, including: an elongated body which can be inserted into the body lumen; a flat portion forming section which is supported by the elongated body, is expandable widthwise on a more distal side than the elongated body, and deforms the body lumen into a form having a flat portion at a distal portion of the flat portion forming section upon the expansion of the flat portion forming section within the body lumen; and an administering section which administers, toward the flat portion formed by the flat portion forming section, a treatment which acts to occlude the flat portion.