Nested Catheter Sock for Minimizing Endoprosthesis Crossing Size
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current endoprosthesis delivery systems require large incisions, causing patient discomfort, longer recovery times, and potential scarring due to the size of the crossing necessary to accommodate the catheter.
Innovation Solution
An endoprosthesis delivery device comprising a catheter, introducer sheath, and a sock that extends over the endoprosthesis, with an outer diameter equal to or less than the endoprosthesis in a compressed configuration, allowing for safe and effective delivery through a smaller crossing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large crossing is used to accommodate the catheter, then the endoprosthesis can be delivered, but patient discomfort increases and recovery time lengthens
Solution Approach 1:
The catheter is nested within the introducer sheath, and the endoprosthesis is nested within the catheter. This nested configuration allows the entire delivery system to pass through a smaller crossing than would be required if each component needed its own separate access path, thereby reducing patient discomfort while maintaining delivery capability.
Solution Approach 2:
The delivery system is segmented into distinct functional components (introducer sheath, catheter, endoprosthesis) that can be independently sized and configured. This segmentation allows optimization of each component's dimensions to achieve minimal crossing size while ensuring proper delivery function.
2Object-affected harmful factors
If the introducer sheath outer diameter is reduced to minimize incision size, then patient scarring is reduced, but the system may not accommodate the endoprosthesis
Solution Approach 1:
The endoprosthesis is compressed to reduce its outer diameter, allowing it to fit within a smaller introducer sheath. This parameter change (from expanded to compressed state) enables the introducer sheath to have a reduced outer diameter for minimal incision while still accommodating the endoprosthesis during delivery.
Solution Approach 2:
The system transitions from a static size requirement to a dynamic configuration where the endoprosthesis changes size (compressed during delivery, expanded at deployment). This dynamic approach allows the introducer sheath to be sized for minimal incision while the endoprosthesis achieves its functional size only when needed.
3Length of moving object
If a sock is added to cover the endoprosthesis, then delivery through small crossing is enabled, but device complexity increases
Solution Approach 1:
A flexible sock is added to cover the endoprosthesis, creating a smooth outer surface that can be inserted through a small crossing. This thin film approach protects the endoprosthesis during delivery while enabling passage through minimal access sites, with the sock being removed or left in place depending on the specific application.
Data Source
AI summary
The present disclosure relates to catheters for delivering medical devices to a human patient's vasculature. A catheter comprises a sock which covers the medical device at the end of the catheter, and an introducer sheath which is reduced in diameter. This reduced diameter introducer sheath minimizes the crossing of the catheter.