Catheter with Rotating Discharge Sections for Lumen Stenting
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Solution Overview
Problem
Conventional catheters used to dilate body lumens cannot maintain the dilated state after the procedure, leading to potential regeneration of respiratory difficulties such as asthma.
Innovation Solution
A catheter with a main body section that delivers a curable liquid substance through first and second discharge sections, which rotate in opposite directions to form a mesh pattern on the lumen's internal wall, ensuring the substance cures and holds the lumen open even after the catheter is removed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a conventional catheter is used to dilate the body lumen, then the lumen can be dilated during the procedure, but the dilating force is lost after the catheter is drawn out and the cross-sectional area of the body lumen is reduced
Solution Approach 1:
The catheter applies a preliminary action by rotating the discharge sections to deposit the curable liquid substance in a mesh pattern on the lumen wall before the catheter is removed. This preliminary deposition creates a structural framework that maintains the dilated state without requiring continuous catheter presence.
Solution Approach 2:
The curable liquid substance acts as an intermediary material between the catheter and the lumen wall. When deposited in the mesh pattern and cured, it forms a biological tissue holding member that mediates the maintenance of the dilated state after catheter removal.
2Device complexity
If the curable liquid substance is discharged without rotation, then the discharge process is simple, but the substance cannot form a mesh pattern and cannot maintain the dilated state after catheter removal
Solution Approach 1:
The discharge mechanism is segmented into multiple discharge sections (first discharge section and second discharge section) that can rotate independently. This segmentation allows each section to contribute to forming the mesh pattern through rotational movement, creating a more reliable structure while maintaining manageable complexity.
Solution Approach 2:
The discharge sections are designed to rotate dynamically during the discharge process. This dynamic rotation enables the curable liquid substance to be deposited in a mesh pattern, transforming the static discharge process into a dynamic one that creates structurally sound formations.
3Device complexity
If a single discharge section is used, then the device structure is simple, but the curable liquid substance cannot form a comprehensive mesh pattern on the lumen wall
Solution Approach 1:
The discharge system is divided into multiple discharge sections positioned at different locations along the catheter shaft. Each section contributes to forming the mesh pattern at its respective location, ensuring comprehensive coverage and precise mesh formation throughout the target area of the lumen wall.
Solution Approach 2:
Multiple discharge sections are arranged in the longitudinal dimension of the catheter, allowing the mesh pattern to be formed across multiple axial positions. This dimensional arrangement ensures comprehensive coverage of the lumen wall surface, improving the completeness and precision of the mesh pattern formation.
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 catheter effectively maintains the dilated state of the body lumen, preventing symptom recurrence like respiratory difficulty, and can be formed in curved or small-diameter lumens with a stable and controlled biological tissue holding member.
Implementation Method 1
a curable liquid substance that is cured in a living body
Implementation Method 2
the first discharge section discharges the curable liquid substance in a filamentous form in the first direction while rotating, and the second discharge section discharges the curable liquid substance in a rotation direction reverse to that of the first direction
Data Source
AI summary
[Object]It is an object of the present invention to provide a catheter for forming a biological tissue holding member by which a body lumen can be maintained in a dilated state even after a procedure of dilating a target part of the body lumen.[Solution]The catheter (100) for forming a biological tissue holding member includes: an elongated main body section (30) having a lumen (31 and 32) through which can flow a curable liquid substance that is cured in a living body; a first discharge section (10) through which the curable liquid substance supplied via the main body section is discharged in a filamentous form in a first direction intersecting the axial direction of the main body section; a second discharge section (20) which is disposed on the distal side along the longitudinal direction of the main body section as compared with the first discharge section and through which the curable liquid substance supplied via the main body section is discharged in a second direction intersecting both of the axial direction and the first direction; a first rotation driving unit (16) which rotates the first discharge section in a first rotation direction; and a second rotation driving unit (24) which rotates the second discharge section in a second rotation direction reverse to the first rotation direction.