Rail Tension Extraction Device for Metallic Foreign Body Retrieval
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Solution Overview
Problem
Current retrieval devices for removing foreign bodies from the vascular system lack consistent engagement of the target, leading to potentially long procedure times and excess imaging due to the absence of effective imaging capabilities, which is costly and traumatic for patients.
Innovation Solution
A rail tension extraction device comprising a base assembly, engagement assembly with magnetic attraction elements, a securing assembly with a tensioned wire or notch, and a locking assembly that allows for consistent and predictable engagement and locking of metallic targets, facilitating their removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If open surgery is used to remove foreign bodies from the vascular system, then complete removal is achieved, but patient trauma, cost, and recovery time increase significantly
Solution Approach 1:
The patent replaces the mechanical open surgery approach with a magnetic field-based retrieval system. Magnets embedded in the catheter tip attract and secure metallic foreign bodies without requiring surgical incisions, thereby eliminating patient trauma while maintaining effective removal capability
Solution Approach 2:
The patent introduces a magnetic field as an intermediary between the retrieval device and the foreign body. The magnetic field acts as a mediator to attract and hold metallic objects, enabling non-invasive retrieval without direct mechanical contact or surgical intervention
2Device complexity
If conventional retrieval devices are used without imaging capabilities, then device complexity is reduced, but engagement consistency and procedure time worsen
Solution Approach 1:
The patent incorporates radiopaque materials that appear as distinct visual markers on imaging equipment. These visual indicators allow operators to track the catheter and foreign body positions in real-time, ensuring consistent engagement and reducing procedure time without adding complex imaging systems to the retrieval device itself
3Ease of operation
If conventional retrieval devices are used without consistent engagement mechanisms, then device simplicity is maintained, but procedure efficiency and imaging requirements deteriorate
Solution Approach 1:
The patent employs a J-shaped catheter design that naturally curves to follow vascular pathways and positions the magnetic tip optimally for engaging foreign bodies. This curved geometry enables consistent engagement while maintaining ease of operation through simple catheter advancement
Solution Approach 2:
The magnetic elements are pre-positioned at the catheter tip before insertion, ready to immediately attract and secure foreign bodies upon contact. This preliminary positioning ensures consistent engagement from the moment the device reaches the target, improving procedure efficiency without complicating operation
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 enables quick and efficient removal of metallic targets from the vascular system by ensuring consistent engagement and locking, reducing procedure time and minimizing complications, thus improving patient safety and outcomes.
Implementation Method 1
engagement assembly with magnetic attraction elements
Data Source
AI summary
Rail tension extraction devices and methods of extracting target(s) inside a patient's body are disclosed. The device includes a base assembly having a handle and an elongate base. The device additionally includes at least one magnet configured to engage a metallic target, and a capture element received in the base assembly and disposed adjacent to the at least one magnet. The capture element is configured to at least partially surround the metallic target engaged by the at least one magnet. The device further includes an outer tube configured to move relative to the elongate base between a locking position in which a distal end of the outer tube is adjacent the capture element and the at least one magnet to secure the metallic target therebetween, and an unlocking position in which the distal end of the outer tube is spaced from the capture element and the at least one magnet.