Intraluminal Staple Deployment Device for Plaque Fixation
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Solution Overview
Problem
Current stenting methods for treating atherosclerotic occlusive disease face challenges such as recurrent stenosis, stent fracture, and excessive material usage, which lead to inadequate long-term success and increased risk of restenosis due to the scaffolding effect and material stress on arteries.
Innovation Solution
A system comprising a vascular prosthesis with an elongate body, a sheath, and intravascular tacks that are deployed at spaced-apart locations to minimize contact with the vessel wall, using a delivery mechanism that allows for precise placement and expansion of tacks to hold loose plaque against the arterial wall without the need for extensive stent coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stents are used to hold open the artery after angioplasty, then the artery is kept open and blood flow is maintained, but recurrent stenosis and stent fracture occur due to material stress and scaffolding effect
Solution Approach 1:
The invention extracts only the essential function of holding plaque against the vessel wall without the harmful scaffolding effect. Instead of using a continuous stent structure, the patent employs a delivery device that places discrete intraluminal surgical staples or clips at specific locations to secure plaque, eliminating the need for extensive metal coverage that causes restenosis and fracture
Solution Approach 2:
The patent segments the arterial support function into discrete, localized fixation points rather than continuous stent coverage. The delivery device places multiple separate staples or clips at spaced intervals to hold plaque against the vessel wall, providing mechanical support only where needed while leaving the arterial wall otherwise undisturbed, thus reducing material stress and scaffolding effects
2Productivity
If multiple staples are deployed simultaneously, then efficiency is improved, but precise spacing and positioning control becomes more difficult
Solution Approach 1:
The delivery device is pre-configured with multiple staples or clips positioned at predetermined spaced intervals along its length. This preliminary arrangement ensures that when the device is deployed, the staples are automatically placed at correct spacing without requiring complex real-time control mechanisms, thus maintaining both efficiency and precision
Solution Approach 2:
The delivery device itself serves as an intermediary that enforces proper spacing between staples. The device's structure includes spaced delivery platforms or retention features that physically constrain the staples to specific positions during deployment, ensuring accurate spacing is maintained even when multiple staples are placed simultaneously
3Strength
If conventional stents are used, then arterial support is provided, but excessive foreign material contact increases arterial stiffness and restenosis risk
Solution Approach 1:
The invention applies local quality by providing arterial support only at specific locations where plaque needs to be held against the vessel wall, rather than using continuous stent coverage. The staples or clips are placed discretely at targeted sites, providing mechanical support precisely where needed while minimizing overall foreign material contact with the arterial wall, thus reducing arterial stiffness and restenosis risk
Data Source
AI summary
A system for delivering a surgical staple can include various components. The system may include an elongate body with a proximal end, a distal end, and a plurality of delivery platforms disposed adjacent the distal end. A sheath can move relative to the elongate body from a first position in which the distal end of the sheath is disposed distally of a distal-most distal delivery platform to a second position in which the distal end of the sheath is disposed proximally of at least one delivery platform. A plurality of intravascular tacks can be within the system with each disposed about a corresponding delivery platform.