Stent Delivery System for Access Site Coverage
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Solution Overview
Problem
Current stent delivery methods for the pancreaticobiliary system often fail to effectively cover the access site after stent placement, leading to potential leaks and medical complications due to incomplete closure of the access site.
Innovation Solution
A method and system for delivering and positioning a stent within a body lumen, where the stent is repositioned to cover the access site by retracting a proximal portion over the site, using a primary constrainment member such as a suture, wire, or splittable sheath to expand and secure the stent in place, preventing leakage and ensuring proper positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the stent is delivered through the access site and then the delivery system is withdrawn, then the stent placement is completed efficiently, but the access site remains uncovered leading to potential leaks and complications
Solution Approach 1:
The stent is repositioned proximal to the access site before the delivery system is fully withdrawn, ensuring the access site is covered and sealed. This preliminary positioning action prevents leaks and complications while maintaining efficient stent placement
2Reliability
If the stent is repositioned to cover the access site, then access site closure and leak prevention are achieved, but the device complexity increases due to additional repositioning mechanisms
Solution Approach 1:
The stent delivery system performs multiple functions: it delivers the stent to the target site, repositions the stent proximal to the access site for coverage, and maintains the stent in the correct position throughout the procedure. This multi-functionality reduces the need for separate devices while ensuring reliable access site closure
3Reliability
If the stent is expanded after repositioning to cover the access site, then complete sealing and procedural safety are enhanced, but the risk of stent migration or improper positioning increases during the repositioning process
Solution Approach 1:
The stent is repositioned to the proximal location and secured before expansion occurs. This preliminary positioning ensures the stent is correctly placed and stable, eliminating migration risk before the expansion process seals the access site
4Reliability
If the stent is retracted towards the access site for coverage, then access site protection is improved, but the manufacturing precision required for controlled retraction increases
Solution Approach 1:
The delivery system incorporates integrated retraction mechanisms that provide controlled, precise movement of the stent towards the access site. The system maintains precise control throughout the retraction process, ensuring accurate positioning for optimal access site coverage
Data Source
AI summary
Methods, apparatuses and systems are described for stent delivery and positioning to cover an access site. The method may include delivering the stent through an access site in a wall of the body lumen. In some cases, the method may include repositioning the stent within the body lumen to at least partially cover the access site with the stent. The stent may be repositioned within the body lumen by retracting the stent towards the access site such that a proximal portion of the stent at least partially covers the access site. The stent may then expand within the body lumen. In some cases, the stent may expand within the body lumen by releasing a primary constrainment member from the stent by pulling the primary constrainment member in a proximal direction away from the stent.