Septum Venting in Vascular Access Devices
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Solution Overview
Problem
Current vascular access systems, such as the BD NEXIVA(TM) Closed IV Catheter System, face inefficiencies and risks due to complex procedures and exposure to contamination during the insertion and preparation of vascular access devices, particularly in the handling of vent plugs which can lead to user error and blood exposure.
Innovation Solution
The development of a medical connector device with improved septum venting systems, utilizing gas-permeable vents and biocompatible materials that act as barriers to liquids, along with features like micro tube arrays, laminated film vents, and bi-stable springs to ensure efficient gas escape while preventing liquid leakage, and incorporating protective covers to maintain sterility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a vent plug is used to permit air escape during flashback, then gas venting is enabled, but the system is exposed to contamination risk and requires complex removal/replacement procedures
Solution Approach 1:
The hydrophobic vent is pre-installed and integrated into the catheter system before use, eliminating the need for separate vent plug installation and removal steps. The vent is already in position to permit air escape during flashback while maintaining sterility.
Solution Approach 2:
The hydrophobic vent acts as an intermediary component that selectively permits gas passage while blocking liquid and contaminants. It mediates between the need for air venting and the need to prevent contamination, solving both requirements simultaneously.
2Adaptability or versatility
If the vent plug is removed to replace with another vascular access device, then device replacement is enabled, but the fluid path is temporarily exposed to external contamination
Solution Approach 1:
The hydrophobic vent remains in place and continues to function throughout the entire procedure, including during device replacements. It maintains continuous protection of the fluid path while permitting necessary gas escape, eliminating periods of exposure.
Solution Approach 2:
The vent serves as a permanent intermediary barrier that allows gas communication while blocking liquid and contaminants. This enables device replacements to occur without removing the protective barrier, maintaining sterility while allowing adaptability.
3Ease of operation
If a Luer access device is loosened to permit air escape, then venting is achieved, but user error and inconsistent blood flow control increase
Solution Approach 1:
The hydrophobic vent automatically performs the venting function based on pressure differential without requiring user manipulation. When positive pressure builds during flashback, the vent self-activates to release air, eliminating the need for users to loosen or tighten components.
Solution Approach 2:
The vent's permeability parameter changes based on pressure differential and fluid type. It remains closed to liquids under normal conditions but opens to gases under positive pressure, providing automatic, reliable control without user intervention.
4Object-affected harmful factors
If a traditional vent plug system is used, then air venting is possible, but the number of steps and time required for setup increases
Solution Approach 1:
The hydrophobic vent is merged with the catheter structure itself, becoming an integrated component rather than a separate accessory. This combination eliminates the need for separate vent plug handling steps and reduces setup time.
Solution Approach 2:
The venting capability is prepared in advance as part of the catheter design, so no additional setup steps are required during the procedure. The system is pre-configured to vent air automatically when needed.
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 simplifies the vascular access device setup, reduces the risk of blood exposure and contamination, and enhances the reliability of the vascular access system by ensuring efficient and controlled venting, thus improving user safety and operational efficiency.
Implementation Method 1
the vent including venting material capable for acting as a barrier to liquid while permitting gas to permeate through the material
Implementation Method 2
venting material capable for acting as a barrier to liquid while permitting gas to permeate through the material
Implementation Method 3
bi-stable springs to ensure efficient gas escape while preventing liquid leakage
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A vascular access device may include a septum and a gas permeable vent in communication with at least a portion of the septum. The vent may be capable of venting gas from an extravascular system to which the vascular access device is capable of attaching. A method of venting a medical device may include providing a vascular access device having a septum and forming part of an extravascular system, providing a gas permeable vent in communication with at least a portion of the septum, and venting gas from the extravascular system through the gas permeable vent of the device.