Guide Wire Luer Hub Backward Insertion
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Solution Overview
Problem
The challenge lies in efficiently inserting a thin guide wire with a floppy U-bend configuration into the lumen of a medical catheter, as existing methods often require manual manipulation of the wire, which can be difficult and prone to errors, especially when the guide wire needs to be threaded in the conventional forward direction.
Innovation Solution
A guide wire luer hub with an elongated hub body featuring multiple lumen sections of varying diameters and taper angles is designed to facilitate the insertion of the guide wire, allowing for a coaxial tubing configuration that aligns the guide wire lumen with the hub's centering section, enabling smooth entry and reducing the risk of obstruction by the U-bend configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a guide wire with a floppy U-bend configuration is inserted into a catheter inner body in the conventional forward direction, then the guide wire can be properly positioned, but the manipulation becomes difficult and error-prone due to the U-bend obstruction
Solution Approach 1:
The patent inverts the conventional insertion approach by providing a backward-opening luer connector that allows the guide wire to be inserted from the distal end of the catheter forward to the proximal end, rather than the conventional proximal-to-distal insertion. This inversion resolves the U-bend obstruction problem while maintaining proper guide wire positioning.
Solution Approach 2:
The luer connector acts as an intermediary device that facilitates guide wire insertion by providing a structured pathway with tapered sections. The connector's internal geometry, including the tapered distal section and backward-opening configuration, mediates between the guide wire's U-bend configuration and the catheter inner body, enabling smooth passage without direct manipulation of the floppy wire.
2Adaptability or versatility
If manual manipulation methods are used to thread the guide wire, then flexibility is maintained, but the process becomes time-consuming and prone to operator error
Solution Approach 1:
The luer connector is designed to perform the guide wire insertion function automatically through its self-aligning tapered geometry and backward-opening configuration. The structure guides the wire through the catheter inner body without requiring active manual manipulation, allowing operators to simply insert the wire into the connector and let the device do the work, thereby reducing both time and error potential.
Solution Approach 2:
The patent changes the geometric parameters of the insertion pathway by incorporating tapered sections with specific angles and a backward-opening luer connector configuration. These parameter changes transform the insertion process from a complex manual manipulation task into a simple push-through action, maintaining adaptability while dramatically reducing time and error risk.
3Reliability
If the guide wire lumen is aligned with the hub's centering section, then misalignment and obstruction risks are reduced, but the hub structure becomes more complex with multiple lumen sections
Solution Approach 1:
The hub is segmented into multiple functional lumen sections, each with specific geometric characteristics. The first lumen section provides initial guidance, the second tapered lumen section provides centering, and the third lumen section connects to the catheter. This segmentation allows each section to perform its specific alignment function independently, achieving high reliability through distributed functionality rather than a single complex mechanism.
Data Source
Figure 1A~1B
Figure 2~3
Figure 4A~4B
AI summary
A guide wire luer hub has an elongated hub body with a longitudinal lumen having a plurality of transitions between different lumen sections with different diameters and/or taper angles. The guide wire luer hub is adapted for use with a coaxial guide wire tubing extending from a catheter control handle, where the coaxial tubing has an outer cover or tubing coaxially surrounding a guide wire inner body with a lumen adapted to receive a guide wire, including a guide wire having a floppy, U-bend distal end.