V-clip Needle Shield With Low Friction Surface
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Solution Overview
Problem
Current vascular access systems face challenges in reducing the withdrawal force and friction encountered when removing a needle through a needle tip shield device, which can lead to accidental needle sticks and discomfort during the process.
Innovation Solution
The implementation of a needle tip shield assembly with a V-clip and low friction surfaces, such as polytetrafluoroethylene (Teflon) or soft metals, between the needle and the V-clip, or on the needle itself, to minimize friction and withdrawal force during needle removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a needle tip shield device is used to capture the needle tip and prevent accidental needle sticks, then safety is improved, but the withdrawal force and friction increase as the needle is withdrawn through the shield device
Solution Approach 1:
The patent applies parameter changes by modifying the surface properties of the needle tip shield device. Specifically, it uses low friction coatings (such as polytetrafluoroethylene/Teflon) or soft metal coatings on the surfaces that contact the needle during withdrawal. This changes the friction parameter between the needle and shield surfaces, reducing the withdrawal force from high friction metal-on-metal contact to low friction contact, thereby resolving the contradiction between safety and ease of withdrawal
Solution Approach 2:
The patent employs composite materials by combining different materials with complementary properties. The needle tip shield device integrates structural components (for safety and needle containment) with low friction or soft metal coating materials (for reduced withdrawal force). This composite approach allows the device to simultaneously achieve high safety through robust needle capture and low withdrawal force through the specialized coating surfaces
2Reliability
If a needle tip shield device is used to secure the needle tip, then safety is improved, but grating sensations and discomfort occur during needle withdrawal
Solution Approach 1:
The patent changes the surface friction parameter by applying low friction coatings (polytetrafluoroethylene/Teflon) or soft metal coatings to the needle tip shield device surfaces. This parameter modification eliminates the grating sensations caused by high-friction metal-on-metal contact during needle withdrawal, while the underlying structural design maintains safety through secure needle tip capture
Solution Approach 2:
The low friction coating or soft metal coating acts as an intermediary layer between the needle surface and the shield device structure. This intermediary material reduces direct metal-to-metal contact, eliminating grating sensations and discomfort during withdrawal, while still allowing the shield to effectively capture and secure the needle tip for safety
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
This solution significantly reduces the force required to withdraw the needle and eliminates grating sensations, enhancing safety and ease of use by securely containing the needle tip within the shield device.
Implementation Method 1
The needle cap has a needle shield and at least one low friction surface. The low friction surface resides between the needle shield and the needle.
Implementation Method 2
low friction surfaces, such as polytetrafluoroethylene (Teflon) or soft metals, between the needle and the V-clip, or on the needle itself
Data Source
Figure 1
Figure 2
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AI summary
A V-clip needle shield device (58) for use with an extravascular system (10), the V-clip needle shield comprising a first arm (62) and a second arm (64) joined by an elbow and a structure having at least one low friction surface, wherein the structure having the low friction surface (40) resides between the V-clip needle shield and a needle (30) of the extravascular system.