Antiseptic Cap Syringe With Nested Tip Chamber
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Solution Overview
Problem
Catheters, especially chronic venous catheters, face challenges such as occlusion due to thrombosis and infection risks during use, requiring effective anticoagulant and antiseptic solutions to maintain patency and sterility, but existing methods are not fully effective in preventing reflux and ensuring safe locking procedures.
Innovation Solution
An antiseptic cap and syringe combination with a syringe barrel, plunger, and tip cap design that includes a proximal and distal chamber for engaging the antiseptic cap, preventing rotational movement and ensuring secure attachment to the catheter access point, using antiseptic solutions like citrate salts and antimicrobial agents to prevent infection and occlusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tip cap is designed to receive an antiseptic cap, then the antiseptic cap can be securely stored and engaged, but the device complexity increases due to additional chambers and engagement mechanisms
Solution Approach 1:
The tip cap is designed with a proximal chamber and a distal chamber nested within it, where the distal chamber receives and secures the antiseptic cap. This nesting arrangement allows the antiseptic cap to be stored within the tip cap structure itself, ensuring secure engagement while maintaining a compact overall design.
2Reliability
If ribs are added to prevent rotational movement between the tip cap and antiseptic cap, then reliability improves, but manufacturing complexity increases
Solution Approach 1:
Rather than making the entire tip cap complex, ribs are added only to the distal chamber where they are needed to engage with the antiseptic cap and prevent rotational movement. This localized addition of features maintains simplicity in other areas of the device while achieving the desired reliability.
Data Source
AI summary
A syringe assembly including: (1) a syringe barrel defining a chamber; (2) a plunger mounted in the chamber and moveable with respect to the barrel; and (3) a cap assembly containing a cap and an absorbent material is removably attached to the plunger. An antiseptic cap and syringe combination includes a syringe barrel having an access point connection, and a tip cap having a proximate chamber and a distal chamber. The proximate chamber releasably receives and engages the access point connection of the syringe, and the distal chamber removably receives and engages an antiseptic cap.