Elastic Snare Loop for Tissue Retention
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Solution Overview
Problem
Conventional snare devices often fail to recapture and retain severed tissue effectively, as the tissue may eject or disappear from the medical professional's field of view, complicating the resection process during procedures like Endoscopic Mucosal Resection and polypectomy.
Innovation Solution
A medical device featuring a snare loop with an elastic member that transitions from an unexpanded to an expanded state, allowing for tissue engagement and retention, combined with a snare handle to control the snare loop's movement and a sheath for deployment, ensuring the tissue is securely captured and aspirated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional snare device is used to resect tissue, then the snare loop can sever the tissue, but the severed tissue may eject or disconnect from the snare, disappearing from the field of view and complicating recapture
Solution Approach 1:
The elastic member transitions from a two-dimensional unexpanded state (in the plane of the snare loop) to a three-dimensional expanded state (outside the plane of the snare loop), creating a retaining structure that extends in a new dimension to prevent tissue ejection while maintaining the original snare loop shape for effective severing
2Reliability
If the snare loop shape is altered to retain tissue, then tissue retention may improve, but the snare loop's ability to effectively sever tissue may be compromised
Solution Approach 1:
The device is segmented into functionally independent components: the snare loop maintains its original shape for effective tissue severing, while the elastic member provides tissue retention functionality. This segmentation allows each component to optimize its specific function without compromising the other
Solution Approach 2:
The elastic member transitions from a two-dimensional unexpanded state (in the plane of the snare loop) to a three-dimensional expanded state (outside the plane of the snare loop), creating a retaining structure that extends in a new dimension to prevent tissue ejection while maintaining the original snare loop shape for effective severing
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 efficient severing and retention of tissue without affecting the snare loop's shape, allowing for reliable recapture and resection, improving procedural efficiency by preventing tissue ejection and maintaining visibility.
Implementation Method 1
an elastic member that connects at least two sides of the snare loop, wherein the elastic member is configured to transition from an unexpanded state where the elastic member is in a plane of the snare loop to an expanded state where the elastic member is outside the plane of the snare loop
Data Source
AI summary
A medical device may include a snare loop and an elastic member that connects at least two sides of the snare loop. The elastic member is configured to transition from an unexpanded state where the elastic member is in a plane of the snare loop to an expanded state where the elastic member is outside the plane of the snare loop. The snare loop has a same shape when the elastic member is in the unexpanded shape and the expanded shape.