Protective Priming Cap for Self-Sealing Luer Valves
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Solution Overview
Problem
Current medical administration systems face challenges in priming self-sealing male Luer connectors without fluid leakage, particularly with toxic or expensive medications, and there is a need for a method to protect the connectors from damage and infection.
Innovation Solution
A protective cap system for self-sealing male Luer connectors that includes a reservoir device with a hydrophobic filter, allowing air to vent while keeping liquid within the reservoir, and an outer housing that slides to activate the internal valve for priming, providing mechanical protection and preventing fluid exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the connector is left unsealed for priming, then air can be purged from the line, but fluid may leak and be wasted or exposed to clinicians
Solution Approach 1:
The cap assembly acts as an intermediary device between the connector and the environment during priming. It provides a controlled interface that allows air to escape through the hydrophobic filter while preventing uncontrolled fluid leakage, thus mediating between the need for priming and the need to prevent waste
Solution Approach 2:
The hydrophobic filter is a porous material that allows gas molecules to pass through while repelling liquid. This enables air to be vented during priming while the hydrophobic properties prevent fluid from leaking through the filter, solving the contradiction between needing to purge air and preventing fluid waste
2Ease of operation
If the connector is left unsealed for priming, then air can be purged from the line, but the connector tip is exposed to damage and infection
Solution Approach 1:
The cap assembly is attached to the connector before priming begins, providing preliminary protection to the connector tip. The cap remains in place throughout the priming process, shielding the tip from environmental contaminants and potential damage while still allowing the priming function to occur
Solution Approach 2:
The hydrophobic filter provides a selective barrier that protects the connector interior from external contaminants while allowing air to pass through. This porous structure enables protection without compromising the air venting function needed for priming
3Object-affected harmful factors
If a protective cap is added to the connector, then the connector tip is protected from damage and infection, but the device complexity increases
Solution Approach 1:
The cap assembly serves multiple functions simultaneously: it protects the connector tip from damage and infection, allows air to vent during priming, prevents fluid leakage, and can be easily attached and removed. By combining these functions into a single device, the complexity increase is minimized while achieving multiple protective and operational benefits
Solution Approach 2:
The cap assembly acts as a temporary intermediary component that is attached only when needed for priming and protection. It is not a permanent part of the connector system, allowing the base connector to remain simple while adding functionality only when required
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 cap system effectively vents air during priming, retains liquid within the reservoir, and protects the connector tip from damage and infection, ensuring no fluid is wasted or exposed during the process.
Implementation Method 1
a second opening at which is disposed an hydrophobic filter
Data Source
Figure 1
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AI summary
A cap for use in priming a medical connector that has a distal end at which is disposed a distal connection tip with an aperture through which fluid may flow, and the connector having an internal valve. The cap has a reservoir device with an internal volume and a first opening at a proximal end that is connected with the aperture of the connection tip. The reservoir has a second opening at which is disposed an hydrophobic filter for allowing gases to vent to the atmosphere while retaining liquid in the reservoir device. Over the reservoir device is mounted a slidable housing device used to activate the internal valve of the connector to a flow configuration at which fluid flows from the connector into the reservoir device. The user monitors the reservoir device and when gas has been vented so that only liquid remains, the user slides the housing device to de-activate the connector to the non-flow configuration at which the connector draws back into itself the liquid stored in the reservoir. The cap is then disconnected from the connector with the connector being primed.