Catheter Clamping Assembly for Precise Tissue Grasping
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Solution Overview
Problem
Current treatments for tricuspid regurgitation, such as traditional surgical methods and minimally invasive catheterization, are invasive, risky, and lack effective solutions for precise clamping of human tissues, particularly for varying tissue thicknesses and require improved safety and precision.
Innovation Solution
A clamping instrument and assembly with a positioning base, moving base, clamping arms, linkage arms, and an actuating rod that allows for precise adjustment of clamping force and rotation amplitude, enabling accurate clamping of human tissues with different thicknesses, and includes an auxiliary support to prevent tissue tearing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional surgical methods (thoracotomy and open heart surgery) are used to treat tricuspid regurgitation, then effective treatment can be achieved, but the procedure becomes highly invasive with high complication rates and infection risks
Solution Approach 1:
The patent replaces traditional mechanical surgical intervention (knives, forceps, sutures) with a catheter-based delivery system that uses a clamping assembly to grasp and manipulate tissue. This substitution eliminates the need for open surgery while maintaining therapeutic effectiveness, directly resolving the contradiction between treatment reliability and invasiveness.
Solution Approach 2:
The patent introduces a catheter as an intermediary delivery vehicle that transports the clamping assembly to the target site through blood vessels. This intermediary approach enables minimally invasive access to the heart valve annulus, avoiding direct surgical incisions and reducing infection risk while preserving treatment effectiveness.
2Object-affected harmful factors
If existing minimally invasive catheterization products are used, then invasiveness is reduced, but the products lack mature applications and have limitations in precisely clamping human tissues of different thicknesses
Solution Approach 1:
The clamping assembly employs dynamically adjustable clamping arms that can change their configuration and clamping force based on tissue thickness. The linkage mechanism allows the clamping arms to adapt their position and angle, providing precise clamping for tissues of varying thicknesses while maintaining the minimally invasive approach.
Solution Approach 2:
The patent utilizes parameter changes in the actuating rod's axial position to control the clamping force and rotation amplitude of the clamping arms. By adjusting the axial distance between the actuating rod and the clamping assembly, the system can precisely adapt to different tissue thicknesses, resolving the contradiction between minimally invasive access and clamping precision.
3Device complexity
If a fixed clamping structure is used, then the device complexity is reduced, but the device cannot adapt to human tissues of different thicknesses
Solution Approach 1:
The clamping assembly is segmented into multiple independent clamping arms connected through linkage mechanisms to the actuating rod. This segmentation allows each arm to independently adjust to tissue thickness while maintaining overall structural simplicity. The modular design enables adaptability without significantly increasing device complexity.
Solution Approach 2:
The clamping assembly is designed with universal adaptability to handle tissues of different thicknesses through its adjustable linkage mechanism. The same basic structure can accommodate varying anatomical conditions by adjusting the axial position of the actuating rod, achieving versatility without requiring multiple specialized devices.
Data Source
AI summary
The invention provides a clamping instrument and a clamping assembly, which mainly comprises a positioning base, a moving base, at least two clamping arms connected with the moving base, at least two linkage arms respectively connected with each of the clamping arms and the positioning base, and an actuating rod respectively penetrating through the positioning base and the moving base, wherein the positioning base is rotated circumferentially and fixed axially relative to the actuating rod, and the moving base is rotated circumferentially and moves axially relative to the actuating rod; when the movable rod is rotated circumferentially, a distance between the moving base and the positioning base can be changed, and then each of the clamping arms is linked to be rotated around the moving base to be in an unfolded position or a clamped position so as to clamp a preset site of a human tissue. Thus, the rotating amplitude of the clamping arms can be finely adjusted to provide a clamping force with high precision in the present invention.