Vessel Filter Removal Device with Proximity Detector
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Solution Overview
Problem
Current vessel filter removal and repositioning methods are invasive and require complex visualization procedures, making it difficult to non-invasively engage and remove filters due to the challenge of determining proximity to the filter.
Innovation Solution
A vessel filter repositioning or removal device equipped with a detector and gripper system that includes a collapsible cone gripper and various detection methods (electrical, mechanical, magnetic, optical) to accurately detect and securely grasp the filter, allowing for minimally invasive removal or repositioning without the need for extensive imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex visualization procedures (MRI, X-Ray) are used to locate the vessel filter, then the filter can be accurately located, but the procedure becomes invasive and complex
Solution Approach 1:
The patent introduces an intermediary detection system (acoustic, optical, or electromagnetic sensors) that mediates between the vessel filter and the external monitoring equipment. This intermediary allows real-time detection of the filter's position and engagement status without requiring complex imaging procedures, thus resolving the contradiction between accurate location and procedure complexity
Solution Approach 2:
The patent replaces mechanical visualization systems (MRI, X-Ray) with non-mechanical detection methods such as acoustic sensors that detect vibrations from filter engagement, optical sensors that detect light changes, or electromagnetic sensors that detect field changes. This substitution eliminates the need for complex imaging equipment while maintaining detection accuracy
2Ease of operation
If traditional removal methods are used without proximity detection, then the procedure is simpler, but the ability to non-invasively engage and remove filters is compromised
Solution Approach 1:
The patent implements feedback mechanisms where sensors continuously monitor the proximity between the removal device and the vessel filter, providing real-time information to the operator. This feedback loop enables non-invasive engagement by allowing the operator to precisely control the approach and contact points, thus making the procedure easier while solving the proximity detection difficulty
Solution Approach 2:
The vessel filter incorporates self-detecting features such as acoustic emissions during engagement, optical markers, or electromagnetic signatures that automatically signal its position and engagement status. This self-service capability eliminates the need for complex external detection systems, enabling non-invasive engagement while simplifying the detection process
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
Enables precise and minimally invasive removal or repositioning of vessel filters, reducing trauma and the need for complex visualization techniques by using a detector-linked gripper system to securely engage and retrieve the filter.
Implementation Method 1
various detection methods (electrical, mechanical, magnetic, optical) to accurately detect and securely grasp the filter
Implementation Method 2
various detection methods (electrical, mechanical, magnetic, optical) to accurately detect and securely grasp the filter
Implementation Method 3
various detection methods (electrical, mechanical, magnetic, optical) to accurately detect and securely grasp the filter
Implementation Method 4
The device may be retrieved from the deployed site by compressing the radially expanded legs and the associated baskets into a compacted size for retrieval
Implementation Method 5
The body of such a filter is usually formed from biocompatible materials, including compressible spring metals and shape memory materials, to allow easy expansion and compression of the filter within the vessel
Implementation Method 6
The hooks on the radially expandable legs may further comprise materials more elastic than the legs to permit the hooks to straighten in response to withdrawal forces and to facilitate withdrawal from the endothelium layer without risk of significant injury to the vessel wall
Data Source
Figure 1~2D
Figure 3~4B
Figure 5A~5E
AI summary
A medical device removal system includes a vessel filter repositioning or removal device to remove and/or reposition a medical device, such as a vessel filter. The system includes a gripper to grip a medical device that is located within a body vessel, and a detector, linked to the gripper, to detect the proximity of the medical device to the gripper. The system may also include an output to indicate a signal from the detector.