Unified Catheter Insertion Tool with Guidewire Advancement
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Solution Overview
Problem
Existing catheter placement procedures require multiple devices for needle insertion, guidewire advancement, and catheter insertion, making the process complex and cumbersome.
Innovation Solution
A unified insertion tool that integrates needle insertion, guidewire advancement, and catheter insertion into a single device, featuring a housing with a hollow needle and a pre-disposed guidewire and catheter, along with advancement assemblies for controlled progression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate devices are used for needle insertion, guidewire advancement, and catheter insertion, then each function can be performed with a dedicated tool, but the overall procedure becomes complex and cumbersome
Solution Approach 1:
The patent combines needle, guidewire, and catheter into a single integrated insertion device. The needle is hollow to allow guidewire passage, and the catheter is pre-positioned over the needle, merging three separate components into one unified tool that performs all three functions (needle insertion, guidewire advancement, catheter placement) through a single device structure.
Solution Approach 2:
The insertion device is designed as a multi-functional tool where the needle serves dual purposes (cutting puncture and guiding the catheter), the guidewire provides both structural support and positioning guidance, and the entire assembly can be advanced as one unit or in sequential steps, allowing a single device to perform multiple distinct medical functions.
2Ease of operation
If multiple separate devices are used for needle insertion, guidewire advancement, and catheter insertion, then each component can be independently controlled, but the insertion procedure becomes time-consuming and inefficient
Solution Approach 1:
The device incorporates dynamic control mechanisms including a ratchet system that allows unidirectional advancement of the catheter over the needle, and a pushrod mechanism that enables controlled guidewire advancement. These dynamic features allow the operator to advance components sequentially or simultaneously as needed, providing flexible control while maintaining efficient insertion workflow.
Solution Approach 2:
The catheter is pre-positioned over the needle and the guidewire is pre-positioned within the needle before the insertion procedure begins. This preliminary arrangement eliminates the need to separately handle and position each component during the procedure, allowing for streamlined sequential advancement while maintaining independent control capability.
3Productivity
If a unified insertion tool is used for needle, guidewire, and catheter advancement, then the procedure is simplified and efficiency is enhanced, but the device structure becomes more complex
Solution Approach 1:
The device employs a nested structure where the guidewire is positioned within the hollow needle lumen, and the catheter is positioned over the needle. This nesting arrangement allows all three components to be contained within a compact unified device structure, achieving space efficiency while maintaining the ability to advance each component independently or together.
Solution Approach 2:
While unified in structure, the device maintains functional segmentation through separate control mechanisms for each component. The needle, guidewire, and catheter can be advanced through distinct motions and control systems, allowing the unified device to function as multiple independent tools would, but with integrated structural benefits.
Data Source
AI summary
An insertion device includes a housing, a sheath, a guidewire, and a wheel assembly. The housing has a distal opening at a distal end and a proximal opening at a proximal end. The sheath is coupled to the proximal end of the housing and has an interior in communication with a proximal opening of the housing. The guidewire extends through the proximal opening and into the sheath. The guidewire includes a feature to limit distal advancement of the guidewire. The wheel assembly is rotatably coupled to the housing and connected to the guidewire such that rotation of the wheel assembly distally advances the guidewire through the distal opening of the housing.