Embolic Coil Delivery System Outer Surface Loading
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Solution Overview
Problem
Conventional embolic coil delivery systems face procedural complications due to resistance from coils loaded in the catheter lumen, leading to imprecise positioning during embolization procedures.
Innovation Solution
An embolic coil delivery system featuring a flexible elongate body with embolic coils loaded on its outer surface, allowing a delivery catheter to advance over the body and unload the coils precisely at the delivery site, reducing resistance and improving positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If embolic coils are loaded into the lumen of a catheter for delivery, then the coils can be transported through the vasculature, but resistance is created by the coils loaded into the catheter lumen leading to procedural complications and imprecise positioning
Solution Approach 1:
The patent transitions from loading coils inside the catheter lumen (one-dimensional confinement) to loading coils on the outer surface of a flexible elongate body (two-dimensional surface placement). This dimensional change allows the coils to be delivered without occupying the catheter lumen, eliminating the resistance problem while maintaining delivery capability and improving positioning precision.
2Productivity
If embolic coils are loaded into the catheter lumen, then the catheter can be inserted into the vasculature, but resistance from the coils creates procedural complications
Solution Approach 1:
The patent extracts the coils from the catheter lumen and places them on the outer surface of a flexible elongate body. This extraction eliminates the source of resistance and procedural complications while maintaining the ability to deliver coils efficiently through the vasculature, thereby improving both productivity and reliability.
3Ease of operation
If a delivery catheter is used to advance embolic coils through the lumen, then the coils can be delivered to the embolization site, but the resistance from loaded coils leads to imprecise positioning
Solution Approach 1:
The patent repositions coils from inside the catheter lumen to the outer surface of a flexible elongate body, enabling precise positioning at the embolization site without the resistance that would otherwise prevent accurate placement.
Data Source
AI summary
An embolic coil delivery system includes a flexible elongate body having a distal segment. An embolic coil is loaded on the flexible elongate body at the distal segment and contacts an outer surface of the flexible elongate body. The embolic coil delivery system also includes a delivery catheter sized to advance over the flexible elongate body during an embolic coil delivery procedure, wherein a distal segment of the delivery catheter contacts the embolic coil during the embolic coil delivery procedure.