MRI Access Device with Spiral Opening for Single-Visit Intervention
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Solution Overview
Problem
Current interventional MRI procedures are limited due to the unavailability of suitable tools, requiring multiple patient visits for visualization, diagnosis, and treatment, and relying on image fusion techniques that can lead to inaccuracies and complications.
Innovation Solution
Development of advanced access devices, treatment devices, and methods that allow for direct visualization and manipulation of tissues under MRI, enabling single-visit procedures by using elongate tubular members that expand within the body and specialized devices that can be advanced and manipulated within bodily passages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple imaging modalities and image fusion techniques are used to guide intervention, then diagnostic accuracy is improved, but procedural complexity and potential for error increase
Solution Approach 1:
The patent combines visualization, biopsy, and treatment capabilities into a single integrated MRI-guided procedure using one access device with multiple functional components, eliminating the need for separate procedures and image fusion techniques while maintaining diagnostic accuracy
Solution Approach 2:
The access device is designed with multi-functionality, serving as both a visualization guide and a treatment delivery system, allowing all interventional steps to be performed through a single device under MRI guidance without requiring additional imaging modalities
2Reliability
If multiple patient visits are required for visualization, biopsy, and treatment, then each procedure can be optimized separately, but total treatment time and patient burden increase
Solution Approach 1:
The patent merges visualization, biopsy, and treatment into a single integrated procedure performed during one patient visit, eliminating the need for multiple separate visits while maintaining the reliability of each individual procedure through MRI guidance and a unified device design
Solution Approach 2:
The continuous MRI guidance throughout the entire integrated procedure ensures uninterrupted visualization and real-time feedback, allowing all steps from visualization through treatment to be performed continuously in a single session without breaking the diagnostic thread
3Measurement precision
If software image fusion is used to guide biopsy, then MRI and ultrasound data can be combined, but image overlay inaccuracies and tissue compression artifacts occur
Solution Approach 1:
The patent uses the access device itself as a physical intermediary that provides real-time MRI visualization of its position, eliminating the need for software-based image fusion and providing accurate spatial information without image overlay artifacts or tissue compression effects
Data Source
AI summary
Example access devices, treatment devices, and kits useful in performing treatment under magnetic resonance imaging and related methods are described. An example access device includes an elongate tubular member formed of an MRI compatible material and moveable between a first, unexpanded configuration and a second, expanded configuration. The elongate tubular member has a central lengthwise axis, a proximal end, a distal end, an axial length, and a main body that defines a circumferential wall, a lumen, a proximal opening, a distal opening, and a main body opening. The main body opening is arranged in a spiral relative to the lengthwise axis and extends circumferentially along the circumferential wall. The main body opening extends along the entire axial length of the elongate tubular member from the proximal end to the distal end.