Guide Wire Surface Friction Zoning for Prolapse Control
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Solution Overview
Problem
Existing guide wires with structural rigidity differences are prone to breaking and have complex structures, leading to increased manufacturing burdens and potential vessel damage during use.
Innovation Solution
A guide wire design featuring a core with varying diameters and a cylindrical body with distinct surface friction regions, where the distal end side has a higher friction coefficient than the proximal end side, allowing for controlled prolapse suppression without a rigidity gap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigidity difference is structurally provided in the guide wire to suppress prolapse progression, then prolapse control is improved, but the guide wire becomes prone to breaking at the rigidity change point and the structure becomes more complicated
Solution Approach 1:
The patent applies parameter changes by modifying the surface friction coefficient along the longitudinal direction of the guide wire instead of changing structural rigidity. The distal end portion is designed with a higher friction coefficient than the proximal end portion, creating a friction difference that suppresses prolapse progression. This approach achieves the desired stability effect without introducing structural rigidity changes that would cause breakage at transition points.
Solution Approach 2:
The patent implements local quality by providing different surface properties at different locations along the guide wire. Specifically, the distal end portion has a higher surface friction coefficient while the proximal end portion has a lower surface friction coefficient. This localized variation in friction properties allows prolapse suppression at the distal end without affecting the overall structural integrity and reliability of the guide wire.
2Stability of the object's composition
If a rigidity difference is structurally provided in the guide wire to suppress prolapse progression, then prolapse control is improved, but the device complexity and manufacturing burden increase
Solution Approach 1:
The patent replaces complex structural rigidity differences with a simpler parameter change approach by varying the surface friction coefficient along the guide wire length. This can be achieved through surface treatments or coating variations without requiring complex multi-component structures, thereby reducing device complexity and manufacturing burden while still achieving effective prolapse control.
Solution Approach 2:
The patent substitutes a mechanical structural solution (rigidity differences through multi-layer structures or varying cross-sections) with a surface property-based solution (friction coefficient variation). This replacement simplifies the overall device structure by eliminating the need for complex mechanical arrangements while achieving the same functional effect of prolapse suppression.
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 design effectively suppresses prolapse progression while reducing the risk of breakage and simplifying the manufacturing process, ensuring a more robust and efficient guide wire structure.
Implementation Method 1
the first region has a surface property different from a surface property of the second region
Data Source
AI summary
A guide wire includes an elongated core, and a cylindrical body disposed outside the core. An outer peripheral surface of the cylindrical body is partitioned into a first region located on a distal end side and a second region located on a proximal end side with respect to the first region. The first region has a surface property different from a surface property of the second region. The guide wire may be configured such that a first covering layer on a surface of the first region, and a second covering layer on a surface of the second region.