Membrane Implantation System with Axial Adjustment Mechanism
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Solution Overview
Problem
Current methods for implanting membranous stents face challenges such as large implanting system size, difficulty in positioning, high endoleak rates, poor curative effects, and long customization times and high costs due to the need for customized membranes for different patients with varying aortic arch branch diameters and angles.
Innovation Solution
A system and method for implanting membranes and stents separately, utilizing a guide wire, guide core, and catheter with an adjusting mechanism to accurately position the membrane and then implant the stent, allowing for adjustable axial positioning of the membrane and stent to fit accurately on the aortic arch's three-branch vessel, and a stent conveying device for releasable stent deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the membrane and stent are implanted at the same time with the membrane coated on the stent in advance, then the implantation process is simplified, but the size of the implanting system becomes too large to be conveyed in the vessel
Solution Approach 1:
The implantation process is divided into two separate stages: first implanting the membrane alone through a small catheter, then implanting the stent separately. This segmentation allows each component to be delivered through smaller delivery systems that can navigate the vasculature, avoiding the need for a large combined delivery system while maintaining procedural simplicity
Solution Approach 2:
The membrane is implanted and positioned in advance before stent implantation. The adjusting mechanism allows preliminary positioning and axial adjustment of the membrane to ensure proper fit on the aortic arch branches before the stent is deployed to provide radial support
2Device complexity
If the membrane is coated on the stent in advance, then the structure is simplified, but the body portion and branch portions of the membrane become difficult to position at the three-branch vessel
Solution Approach 1:
The membrane delivery system incorporates an adjusting mechanism that allows dynamic axial positioning of the membrane after release. The control wire and turn transmission structure enable the operator to adjust the axial position of the membrane body portion and branch portions to achieve accurate positioning at the three-branch vessel, providing operational flexibility that a fixed pre-coated structure cannot offer
3Manufacturing precision
If customized membranes are made for different patients with varying aortic arch branch diameters and angles, then the fitting accuracy is improved, but the surgery waiting times become very long and costs become very high
Solution Approach 1:
The membrane design incorporates adjustable parameters through the adjusting mechanism, allowing a single standardized membrane design to be adapted to different patient anatomies by changing the axial position of the membrane during implantation. This eliminates the need for custom manufacturing for each patient while maintaining fitting accuracy for varying aortic arch branch diameters and angles
Solution Approach 2:
The developing membrane structure with its adjusting mechanism serves multiple functions: it can accommodate different aortic arch configurations, allow axial positioning adjustments, and provide proper fit for various branch diameters and angles. This universal design replaces the need for patient-specific customization, reducing both time and cost
Data Source
AI summary
The present invention discloses a system for implanting membrane, a system and method for implanting a membrane and a stent respectively. The system for implanting membrane comprising: a body guide wire, a guide core, movably sleeved on the body guide wire, and a catheter, for releasably holding a membrane, the catheter is movably sleeved outside of the guide core, wherein the system for implanting membrane is provided with an adjusting mechanism for adjusting the axial position of the membrane released by the catheter, and the adjusting mechanism is detachably connected with the membrane. The adjusting mechanism detachably connected with the membrane according to the present invention can not only adjust the axial position of the released membrane, but also causes no influence on the normal work of the blood vessel of a patient after the adjustment and improves the implanting efficiency and effect of the membranous stent.