Variable-Diameter Guide Wire Segmented Delivery
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Solution Overview
Problem
Existing medical guide wires fail to ensure smooth delivery of implant instruments into curved blood vessels due to inadequate pushing force, leading to kinking or deformation of the instruments, which hinders successful deployment and adherence to the vessel wall.
Innovation Solution
A medical guide wire with a variable-diameter metal core, multiple coils, and helical delivery elements made of polymer materials, providing segmented pushing forces and a bondage element to prevent deformation and ensure precise positioning of the implant instrument, along with a protective casing to prevent bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only a boss is provided on the guide wire for pushing force, then the structure is simple, but the implant instrument is likely to be kinked or deformed in circuitous blood vessels
Solution Approach 1:
The guide wire is divided into multiple functional segments: a boss at the proximal end for initial pushing force, and a delivery element at the distal end for continued support. This segmentation allows different parts of the implant instrument to receive distributed pushing force, preventing kinking and deformation while maintaining structural feasibility.
Solution Approach 2:
The delivery element acts as an intermediary component between the operator's pushing action and the implant instrument. It transmits and distributes the pushing force along the length of the implant instrument, ensuring even resistance distribution and preventing localized stress that could cause deformation.
2Ease of operation
If the implant instrument is pushed through highly bent blood vessels, then delivery can be achieved, but the resistance is large causing kinking or deformation
Solution Approach 1:
The pushing force is segmented and applied at multiple locations along the implant instrument (proximal end via boss, distal end via delivery element). This distributes the resistance encountered in bent blood vessels across multiple points, preventing concentration of force that would cause kinking or deformation.
Solution Approach 2:
The delivery element is designed with specific material properties (polymer material with appropriate elasticity) and structural parameters (helical structure, specific dimensions) that allow it to flex and adapt to the curvature of blood vessels while maintaining sufficient pushing force to overcome resistance without deforming the implant instrument.
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 guide wire enables integral delivery of implant instruments into blood vessels by distributing resistance evenly and allowing for readjustment of the instrument's position, reducing the risk of kinking and ensuring effective deployment and adherence to the vessel wall.
Implementation Method 1
the delivery element provides a pushing force in a segmented manner to make each segment of the implant instrument receive even resistance by rubbing the inner wall of the implant instrument
Implementation Method 2
the delivery element is a polymer material strip film or a hollow polymer material pipe
Data Source
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AI summary
A medical guide wire comprises a metal core (1), a coil (2), a delivery element (3) and a boss (4). The metal core (1) has a variable-diameter structure, which consists of a linear structure (1-3), a stepped structure (1-2) and a linear structure (1-1) from a proximal end to a distal end. The number of the coil (2) is one or more, and the coil(s) is/are fixed on the linear structure (1-1) and the stepped structure (1-2) at the distal end of the metal core (1). The number of the delivery element (3) is one or more, and the delivery element(s) is/are fixed to the stepped structure (1-2) of the metal core (1). The boss (4) is fixed on the stepped structure (1-2) of the metal core (1) behind the delivery element (3). When the medical guide wire is delivering an implant instrument, the delivery element on the medical guide wire makes each segment of the implant instrument receive even resistance by rubbing the inner wall of the implant instrument, thereby integrally delivering the implant instrument into the human lumen.