Magnetic Localization Marker Prongs to Prevent Tissue Migration
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Solution Overview
Problem
Magnetic markers used for surgical localization can migrate or become dislodged in tissues with regeneration or increased vascularity, leading to inaccurate lesion identification and compromised therapeutic outcomes.
Innovation Solution
A magnetic marker deployment system featuring a body with resilient prongs that expand and engage with tissue upon deployment, preventing migration or dislodgement, using a cannula with lateral apertures or narrowed regions to maintain the marker in a compressed state during insertion and expand for secure placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the time between implantation and surgical removal of the marker is increased to improve patient experience and allow separate procedures, then the convenience and flexibility of treatment planning are improved, but the risk of marker migration or dislodgement increases due to tissue regeneration and vascularity
Solution Approach 1:
The marker is pre-loaded into the cannula in a compressed, stable state before implantation. The resilient prongs are预先 compressed to fit within the cannula lumen, and upon deployment, they automatically expand to engage with the tissue, creating immediate anchoring that prevents migration during the extended time period between procedures
Solution Approach 2:
The marker transitions from a static compressed state during storage and implantation to a dynamic expanded state after deployment. The resilient prongs dynamically change shape - compressed within the cannula for precise delivery, then expanding upon release to engage tissue and prevent migration, adapting to the mechanical requirements of each phase
2Reliability
If the marker is designed with resilient prongs that expand after deployment to engage with tissue and prevent migration, then the marker stability and reliability are improved, but the device complexity and structural requirements increase
Solution Approach 1:
The marker body is segmented into multiple resilient prongs that can independently deform and expand. This segmentation allows each prong to function as an independent anchoring element, providing enhanced stability through distributed engagement with the tissue while maintaining a relatively simple overall structure that can be compressed into the cannula
Solution Approach 2:
The physical parameters of the marker - specifically the shape and volume of the resilient prongs - change after deployment. The prongs transition from a compressed configuration within the cannula to an expanded configuration in tissue, utilizing elastic deformation to achieve anchoring without requiring complex mechanical components or additional actuators
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 system effectively secures the marker in place, ensuring accurate localization and reducing migration risks, particularly in tissues with regeneration or increased vascularity.
Implementation Method 1
at least one resilient prong extending from the body, the at least one resilient prong configured to have an expanded state and a compressed state
Data Source
AI summary
A deployment system for a magnetic marker includes a cannula having a lumen, an open distal end, and a at least one lateral aperture; and a magnetic marker having a body and at least one resilient prong extending from the body, the at least one resilient prong configured to have an expanded state and a compressed state, wherein the magnetic marker is configured to be stored in the expanded state within the lumen of the cannula such that at least a portion of the at least one resilient prong is within a corresponding lateral aperture of the at least one lateral aperture of the cannula, wherein the lumen has a diameter configured to compress the at least one resilient prong of the magnetic marker into the compressed state during deployment of the magnetic marker.