Helical Medical Marker with Non-Circular Windings for Stable Anchoring
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Solution Overview
Problem
Existing medical markers with helical coil designs have a weak anchoring effect, making it difficult for them to stably remain at a predetermined site in a patient's body.
Innovation Solution
A medical marker with a helical body where the unit windings have a non-perfect circular shape, overlapping terminal and start ends, and convex portions that act as anchors, ensuring stable positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a helical coil marker with moderately uneven surface is used, then the marker can follow changes in shape, size, or position of anatomical site, but the anchoring effect is weak and stability at predetermined site is poor
Solution Approach 1:
The patent applies asymmetry by designing unit windings with non-circular cross-sections (e.g., triangular, rectangular, or other polygonal shapes) instead of conventional circular windings. This asymmetric geometry creates convex portions that protrude from the outer circumference of the helical body, providing enhanced anchoring effect while maintaining the ability to adapt to anatomical site changes
Solution Approach 2:
The patent implements local quality by creating convex portions at specific locations (vertex regions) of the unit windings that have different geometric properties from other regions. These localized convex portions provide concentrated anchoring points that enhance stability without compromising the overall flexibility and adaptability of the helical body
2Reliability
If unit windings are contiguously aligned with overlap and phase difference, then anchoring effect is enhanced, but manufacturing precision requirements increase
Solution Approach 1:
The asymmetric non-circular unit winding design inherently creates distinct vertex regions that serve as natural reference points for overlap and phase difference control during manufacturing, making it easier to achieve consistent anchoring effects
Solution Approach 2:
The patent specifies predetermined overlap amounts and phase differences between adjacent unit windings as design parameters, allowing manufacturers to plan and control the anchoring geometry in advance during the manufacturing process rather than relying on post-manufacturing adjustments
Data Source
AI summary
A medical marker is provided that will remain at a predetermined site in a patient's body. The medical marker includes a helical body obtained by making a linear body in a helical shape. When the helical body is viewed from an axial direction of the helical body, a winding shape of a unit winding constituting one winding of the helical body is a non-perfect circle, and a plurality of the unit windings contiguously aligned in the axial direction overlap at a terminal end part of one of the adjacent unit windings and a start end part of the other of the adjacent unit windings. As a result, there is a phase difference in the winding shape by an amount of overlap.