Stent Sheath Release Tool for Stable Proximal Deployment
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Solution Overview
Problem
Current stent device delivery systems require complex procedures involving central shafts, mounting loops, and release wires, which increase the risk of dislodging the deployed device and limit the ability to anastomose the non-stented end before deployment, necessitating invasive surgeries like thoracotomy and cardiac arrest.
Innovation Solution
A stent device deployment apparatus with a bore restriction and no central shaft, allowing sheath material to be pulled past the restriction, exposing the stent device at the proximal end, enabling simpler deployment and connection options, and reducing procedural steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional stent delivery systems with central shafts and mounting loops are used, then the device can be supported and deployed, but the system complexity increases and the risk of dislodging the deployed device increases
Solution Approach 1:
The patent removes the central shaft and mounting loops from the delivery system, extracting the problematic components that caused complexity and dislodgement risks. The stent is deployed without these traditional support structures, achieving simpler deployment with reduced complications.
2Adaptability or versatility
If conventional delivery systems with release wires are used, then the stent can be suspended and deployed, but the ability to anastomose the non-stented end before deployment is limited
Solution Approach 1:
The release wire and mounting loop components are removed from the system. This extraction enables the non-stented end of the graft to be freely accessible for anastomosis to adjunctive devices or native vessels before stent deployment, providing surgical flexibility without the constraints of traditional release mechanisms.
3Ease of operation
If traditional delivery systems are used, then the stent can be delivered, but invasive surgery like thoracotomy and cardiac arrest is required
Solution Approach 1:
The patent enables a transition from open surgical mechanical procedures (thoracotomy, cardiac arrest) to a less invasive endovascular approach. The simplified delivery system allows percutaneous access and deployment without the need for major surgical opening and cardiopulmonary bypass, reducing surgical trauma and risk.
Data Source
AI summary
The present application relates to a stent device deployment apparatus. The apparatus comprises a body having an internal bore for receiving at least a length of sheathed stent device collapsed into an un-deployed state. A bore restriction is provided for restricting passage of any stent device present in the bore to a distal end of the body. The bore restriction is configured for allowing stent device sheath material of a stent device in the bore to be accessed at the distal end of the body and pulled past the bore restriction, thereby exposing the stent device at a proximal end thereof.