Staggered Strut Embolic Protection Basket
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Solution Overview
Problem
Current embolic protection devices restrict blood flow when deployed and are difficult to retrieve after use during stenosis procedures in the vasculature.
Innovation Solution
An embolic protection device with a reticulated body having a singly staggered strut configuration that minimizes flow restriction and is easy to collapse and retrieve, comprising a basket with a filter portion for capturing emboli, and a balloon catheter assembly for deployment and retrieval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current embolic protection devices are deployed within the vasculature, then emboli are captured, but blood flow is restricted
Solution Approach 1:
The device employs a reticulated body structure with interconnected struts forming a porous network that allows blood to flow through while intercepting emboli. The porous configuration enables differential passage based on size, permitting blood cells to pass while capturing larger embolic material.
Solution Approach 2:
The filter portion of the device has a different structural configuration compared to the basket portion, with the reticulated body providing localized filtering capability at the distal end while maintaining structural integrity throughout. This local differentiation allows blood flow preservation in the filter region while maintaining emboli capture function.
2Reliability
If current embolic protection devices are deployed within the vasculature, then emboli are captured, but the device is difficult to retrieve
Solution Approach 1:
The device incorporates a dynamic collapse mechanism where the reticulated body and basket structure can transition from an expanded deployed state to a compressed retrieved state. The interconnected struts are designed to flex and fold upon application of retrieval force, enabling easy withdrawal through the catheter.
Solution Approach 2:
The collapsed device nests within the delivery catheter for retrieval, with the compressed reticulated body and basket fitting inside the catheter lumen. This nested configuration facilitates minimally invasive removal through the vascular access site.
3Ease of operation
If the basket includes a reticulated body with staggered struts, then the device is easy to collapse and retrieve, but manufacturing complexity increases
Solution Approach 1:
The reticulated body is constructed from discrete strut segments that are interconnected at junctions, allowing the structure to be manufactured using modular techniques. The staggered configuration is achieved by systematically arranging these segments in a repeating pattern, simplifying the manufacturing process while maintaining the desired mechanical properties.
Data Source
AI summary
An embolic protection device for capturing emboli during treatment of a stenotic lesion in a body vessel is disclosed. The device comprises a basket and a filter attached to the basket. The basket has a deployed state and an undeployed state. The basket includes a reticulated body having an outer diameter. The reticulated body includes a plurality of struts connected together in a singly staggered configuration distally along a longitudinal axis to a distal end. The plurality of struts of the reticulated body is configured to fold along the longitudinal axis. The basket has a proximal stem proximally extending from the body. The filter portion has a lip attached to the distal end defining an opening of the filter portion when the basket is in the deployed state for capturing emboli. The filter portion extends from the lip to a filter end.