Expandable Vascular Retrieval Device for Thrombus Extraction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current medical systems for removing occlusions from vessels, such as thrombi, are limited by their inability to effectively handle large vascular structures, calcified material, and require multiple catheters, leading to inefficiencies and increased complexity, with a lack of flexibility in device sizing and poor distal protection during thrombectomy procedures.
Innovation Solution
A recanalization system with an elongate member featuring a distal and proximal element that can radially expand, contract, and rotate, allowing for dynamic adjustment to match the size of the occlusion within the vessel, and includes a sensor system to monitor force exerted on the vessel wall, along with an aspiration system for efficient removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a wire structure is used to remove thrombus, then the thrombus can be grasped and extracted, but distal protection from secondary emboli is poor due to open-ended structure
Solution Approach 1:
The retrieval device is divided into multiple segments including a proximal body, distal body, and intermediate section. The proximal body provides distal protection while the distal body engages the thrombus, allowing simultaneous achievement of extraction capability and embolic protection through segmented design.
Solution Approach 2:
The retrieval device is nested within a delivery catheter during insertion, allowing the device to be compactly delivered through the catheter lumen. Once deployed, the retrieval device can be expanded to engage the thrombus while maintaining protection through the nested configuration of proximal and distal bodies.
2Adaptability or versatility
If multiple co-axial catheters are used for different functions, then comprehensive thrombectomy capability is achieved, but device complexity and manufacturing cost increase
Solution Approach 1:
Multiple functional elements (proximal body for protection, distal body for thrombus engagement, intermediate section for flexibility) are merged into a single integrated retrieval device that can be delivered through one catheter, eliminating the need for multiple co-axial catheters while maintaining comprehensive thrombectomy capability.
Solution Approach 2:
The retrieval device performs multiple functions through its design: the proximal body provides distal protection, the distal body engages and retrieves thrombus, and the intermediate section provides flexibility for navigation. This multi-functional design replaces multiple specialized catheters with a single universal device.
3Ease of manufacture
If fixed-diameter instrumentation is used, then device manufacturing is simplified, but flexibility in matching device size to thrombus size is reduced
Solution Approach 1:
The retrieval device incorporates expandable elements that can dynamically adjust their diameter to match the thrombus size. The proximal and distal bodies can be expanded from a compressed delivery state to an operational state, providing adaptability to different thrombus dimensions while maintaining manufacturing simplicity through a standardized expandable structure.
Data Source
AI summary
A system for dislodging and removing occlusions from a vascular vessel. The system includes a handle and an elongate member, the elongate member including an occlusion dislodging member adapted to axially move, radially expand and contract, and rotate to dislodge vessel occlusions. The handle is adapted to selectively induce the axial movement, radial expansion and contraction, and rotation of the occlusion dislodging member.