One-Handed Guidewire Insertion Device with Elastic Seal
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Solution Overview
Problem
Existing guidewire insertion devices require two-handed operation and necessitate the guidewire to be installed after needle placement, due to air/fluid leakage issues, and are often bulky and difficult to control.
Innovation Solution
A compact, one-handed guidewire insertion device with a syringe featuring a plunger and a valve assembly that prevents substantial air/fluid leakage, allowing the guidewire to be pre-installed and ensuring minimal air entry during operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional syringe design is used for guidewire insertion, then the device structure is simple, but air/fluid leakage occurs during operation requiring two-handed operation and post-needle-placement guidewire installation
Solution Approach 1:
The syringe plunger is segmented into multiple functional components: a plunger body, a separate valve assembly with elastic seal, and a flange. This segmentation allows the valve assembly to be integrated into the plunger structure to prevent air/fluid leakage while maintaining overall device functionality.
Solution Approach 2:
The valve assembly is merged with the plunger structure, combining the sealing function with the plunger's existing guidewire passage and flange. The elastic seal is positioned within the plunger body to create a integrated sealing mechanism that prevents leakage during guidewire insertion.
2Ease of operation
If existing guidewire insertion devices are used, then the basic insertion function is achieved, but the devices are bulky and exhibit difficult-to-control lever effects
Solution Approach 1:
The guidewire is pre-installed through the plunger and needle assembly before the insertion procedure. The valve assembly is pre-configured with the elastic seal positioned to engage the guidewire. This preliminary configuration eliminates the need for bulky adjustment mechanisms during the procedure and reduces lever effects by establishing a compact, pre-assembled structure.
3Productivity
If the guidewire is pre-installed in the syringe, then operation efficiency is improved, but air/fluid leakage occurs during needle placement
Solution Approach 1:
An elastic seal acts as an intermediary element between the guidewire and the syringe plunger. This elastic seal creates a reliable sealing interface that prevents air/fluid leakage while allowing the guidewire to be pre-installed and move freely during the insertion procedure.
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 device enables efficient one-handed operation with improved control and reduced air leakage, allowing for precise guidewire placement and minimizing procedural complexity.
Implementation Method 1
The valve assembly has at least one elastic seal around the installed guidewire
Implementation Method 2
The valve assembly is configured to prevent substantial air/fluid leakage during needle placement
Data Source
AI summary
A device for one-handed insertion of a guidewire includes a mounting/gripping member and an actuator carriage. A syringe mounted on the mounting/gripping member has a barrel and a plunger containing a valve assembly. A guidewire is installed through a passage in the plunger. The valve assembly engages the guidewire with at least one elastic seal in an interference fit. The carriage has a guidewire feed and a trigger. The trigger can slide the carriage axially along the mounting/gripping member, which moves the plunger forwardly and backwardly. While a user holds the mounting/gripping member, the trigger can be moved with a digit and another digit of the same hand engages the guidewire between the digit and the guidewire feed and advances it through the syringe, sensing the degree of resistance encountered by a portion of the guidewire.