Spider Occlusion Device Frame and Membrane Integration
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Solution Overview
Problem
Current vascular occlusion devices, such as inflatable balloons and embolization coils, are either temporary or require significant time for tissue growth to occlude a body vessel effectively, posing risks and complexity due to the need for multiple devices.
Innovation Solution
A spider-shaped vascular occlusion device is created using a frame with flexible arcuate legs and a biocompatible material, where the legs are attached to a base layer formed on a mandrel, forming a membrane to occlude the vessel quickly and securely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If embolization coils are used to occlude a blood vessel, then the occlusion is permanent, but it takes a significant period of time for tissue to grow and fully occlude the vessel
Solution Approach 1:
The device segments the occlusion function into two parts: the frame structure (spider shape) provides immediate mechanical occlusion, while the biocompatible material provides immediate barrier function. This segmentation allows both permanent and rapid occlusion simultaneously, eliminating the time delay associated with tissue growth alone.
Solution Approach 2:
The invention combines the frame structure (made of shape memory material or flexible polymer) with biocompatible material (such as Dacron, Teflon, or other synthetic graft materials) to create a composite occlusion device. This composite structure provides both immediate mechanical blockage and biological integration, achieving permanent occlusion without waiting for tissue growth.
2Stability of the object's composition
If a spider shaped device with embolization coil is used to prevent dislodgment, then coil stability is improved, but the device complexity increases due to requiring two separate devices
Solution Approach 1:
The invention merges the frame structure and the biocompatible material into a single integrated device. The frame is constructed with legs that are directly attached to or covered by the biocompatible material, creating one unified occlusion device that combines the stabilizing function with the occlusion function, eliminating the need for separate coil and spider device delivery.
3Reliability
If a spider shaped device is used to occlude a blood vessel, then occlusion is achieved, but blood may continue to flow past the coil and spider device until full occlusion occurs
Solution Approach 1:
The biocompatible material is applied locally to specific portions of the frame legs, creating localized barrier regions that prevent blood flow past the device. The material can be disposed as a coating on the legs or as discrete segments, providing targeted occlusion where needed while maintaining the overall structural integrity of the spider device.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device provides rapid and reliable occlusion of blood vessels, reducing the risk of injury and simplifying the procedure by using a single device with a biocompatible material that forms a durable membrane to prevent blood flow.
Implementation Method 1
The liquid biocompatible material is releasably disposed from the source onto the outer surface of the mandrel and is allowed to dry into a solid biocompatible base layer
Implementation Method 2
the biocompatible material forms a membrane extending along and between each of the arcuate legs
Data Source
AI summary
An apparatus and method for making an occlusion device for occluding a body vessel. The apparatus and method include providing a frame and a mandrel. The frame has a hub extending along a longitudinal axis from a proximal end to a distal end. A plurality of arcuate legs are attached to the hub and extend distally. The arcuate legs are flexible and have inner surfaces defining an inner profile in an unconstrained state. The mandrel has an outer surface corresponding to the inner profile of the occlusion device. A base layer of a biocompatible material is disposed on the outer surface of the mandrel. The frame is placed on the outer surface with the base layer between the frame and the mandrel. The frame is attached to the base layer such that the biocompatible material forms a membrane extending along and between the arcuate legs.