Loop-Tip Guide Wire Structure for Safer Lesion Crossing
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Solution Overview
Problem
Existing guide wires leave room for improvement in safety, particularly during the treatment of stenosis or occlusion sites in blood vessels.
Innovation Solution
A medical device comprising a main body part and a leading portion with a loop-shaped loop portion formed by a spirally wound coil, where the leading portion is connected to the distal end of the main body part and configured to enter the lesion, enhancing safety and efficiency through improved flexibility, torquability, and visibility under radioscopy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a guide wire uses a conventional straight or simple bent configuration, then it is easy to manufacture and operate, but it causes damage to blood vessels due to poor flexibility and safety
Solution Approach 1:
The guide wire incorporates a loop portion with a curved configuration at the distal end, transforming the conventional straight or simple bent shape into a loop structure. This curvature improvement enhances flexibility and safety by reducing damage to blood vessels during insertion and navigation, while maintaining manufacturability through standard forming processes.
2Productivity
If a guide wire uses a simple structure, then it is easy to manufacture, but it cannot efficiently excavate lesions due to insufficient flexibility and torquability
Solution Approach 1:
The loop portion's curved configuration provides enhanced flexibility and torquability, enabling the guide wire to efficiently navigate and excavate lesions. The loop structure allows better conformability to vascular anatomy and improved mechanical performance during lesion treatment while remaining manufacturable.
Solution Approach 2:
The guide wire applies different structural characteristics to different portions: the loop portion at the distal end has enhanced curvature and flexibility for lesion excavation, while the main body maintains a simpler structure for ease of manufacture and operation. This local differentiation optimizes both efficiency and manufacturability.
3Measurement precision
If a guide wire lacks proper loop formation, then the manufacturing process is simpler, but visibility under radioscopy is reduced
Solution Approach 1:
The loop portion's curved configuration provides enhanced visibility under radioscopy compared to straight or simple bent configurations. The loop structure creates a distinct radiopaque silhouette that improves visualization during the procedure. The loop can be formed using standard manufacturing techniques, balancing visibility improvement with manufacturing ease.
Data Source
AI summary
A medical device includes a main body part and a leading portion including loop-shaped loop portion that is formed by a coil. The coil is formed by a spirally wound wire rod. The leading portion is connected to a distal end of the main body part and can enter a lesion.