Transparent Needle Hub Flashback Pathway for Real-Time Vein Confirmation
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Solution Overview
Problem
Existing intravenous catheters lack effective mechanisms for real-time or near real-time visualization of blood flashback during vein access, which is crucial for confirming proper placement and reducing insertion complications.
Innovation Solution
A catheter system with a flow control plug and transparent needle hub that includes a flashback pathway with a channel and vents, allowing for unobstructed, sharp-contrast visualization of a small volume of blood, facilitating real-time vein confirmation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional intravenous catheter without a dedicated flashback pathway is used, then the device structure remains simple, but the ability to visualize blood flashback in real-time is insufficient
Solution Approach 1:
The catheter system divides the flashback visualization function into a separate pathway (channel) within the hub body, distinct from the main catheter lumen. This segmentation allows blood to be directed through a dedicated observation path, improving visualization reliability without complicating the overall catheter structure.
Solution Approach 2:
The hub body acts as an intermediary structure that receives blood from the needle and redirects it through a controlled pathway to the observation area. This intermediary mechanism enables reliable blood flashback visualization while maintaining a relatively simple catheter design.
2Measurement precision
If blood flows freely through the needle hub, then the device structure remains simple, but the visualization of blood flashback is obstructed and lacks sharp contrast
Solution Approach 1:
The hub body incorporates a specific local structure (channel with observation area) that provides sharp contrast for blood visualization. This localized quality enhancement in the hub structure improves measurement precision of blood flashback without requiring complex modifications throughout the entire device.
Solution Approach 2:
The observation area within the channel provides a background that creates sharp contrast with blood, enhancing the visual detection of blood flashback. This contrast mechanism improves visualization precision while maintaining a relatively simple hub structure.
3Measurement precision
If the needle hub is made transparent for blood observation, then blood visualization is improved, but the structural strength and sealing capability may be compromised
Solution Approach 1:
Only the specific observation area of the hub body is made transparent, while other structural portions maintain their normal material properties and strength. This localized transparency approach improves blood observation precision without compromising the overall structural strength of the hub.
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
Provides real-time or near real-time visualization of vein access with a small amount of blood, enhancing the accuracy and efficiency of intravenous catheter placement.
Implementation Method 1
The flow control plug may include one or more vents, which may include a porous membrane or microgrooves that may vent air while containing blood
Implementation Method 2
the needle hub may be constructed of a clear or transparent material, which may facilitate observation blood within the flashback pathway
Implementation Method 3
the needle hub may include a lens, which may facilitate observation of blood within the flashback pathway
Implementation Method 4
the flow control plug may be constructed of a white material, which may provide a sharp contrast when blood flows into the flashback pathway
Data Source
Figure 1A
Figure 1B
Figure 1C~1D
AI summary
A catheter system may include a catheter adapter, a catheter extending distally from the distal end of the catheter adapter, and a needle hub coupled to the catheter adapter. The needle hub may be transparent, and a needle may be secured within the needle hub. The catheter system may also include a flow control plug coupled to the proximal end of the needle hub. In some embodiments, a flashback pathway may be disposed between an outer surface of the flow control plug and an inner surface of the needle hub. In some embodiments, the catheter system may include an inner barrel and an outer barrel, and the inner barrel and the needle hub may be configured to move proximally within the outer barrel to retract the needle. The flashback pathway may be disposed between an outer surface of the needle hub and an inner surface of the inner barrel.