Subcutaneous Infusion Set with Rotating Septum Cap
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Solution Overview
Problem
Conventional catheter infusion sets are complex, bulky, and uncomfortable, lacking a simple priming method and discreet wearability, which hinders user mobility and comfort.
Innovation Solution
A subcutaneous infusion set design featuring a multiple septum system with a rotatable septum cap and blunt cannula, allowing 360-degree movement and reduced component count for easier manufacturing and user convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional catheter infusion sets are used, then fluid delivery function is provided, but the device becomes complex and bulky
Solution Approach 1:
The patent combines multiple components into a single integrated hub structure that houses the septum, catheter connection, and extension set connection. This merging of components reduces the overall device complexity and bulk while maintaining all necessary fluid delivery functions through the integrated design.
Solution Approach 2:
The infusion set is divided into distinct functional modules: a base portion with hub, a rotatable extension set, and a separate catheter assembly. This segmentation allows each component to be optimized independently while simplifying the overall structure and reducing complexity through modular design.
2Ease of operation
If conventional infusion sets with rigid tubing placement are used, then structural stability is maintained, but user comfort and mobility are reduced
Solution Approach 1:
The extension set is designed to rotate up to 360 degrees around the base hub, transforming the rigid, fixed tubing placement into a dynamic, adaptable configuration. This rotational capability allows the tubing to move with the user's body, improving comfort and mobility while maintaining stable fluid delivery through the rotating connection.
3Reliability
If multiple septa are used in the infusion set, then fluid communication control is improved, but manufacturing complexity increases
Solution Approach 1:
Multiple septa are integrated into a single hub structure rather than being separate components. This merging maintains the fluid communication control functions of multiple septa (priming access, infusion access, sealing) while simplifying manufacturing by reducing the number of discrete parts that need to be assembled.
4Reliability
If conventional infusion sets are designed, then medicament delivery function is provided, but construction costs are high
Solution Approach 1:
The hub structure integrates multiple functions (septum housing, catheter connection, extension set connection, priming chamber) into a single molded component. This merging reduces the total number of parts, simplifies assembly, and lowers construction costs while maintaining reliable medicament delivery through the integrated fluid pathways.
Solution Approach 2:
The hub structure serves multiple functions simultaneously: it houses the septum for controlled access, connects the catheter for fluid delivery, interfaces with the extension set for priming and flushing, and provides structural support. This multi-functionality reduces the need for separate components, lowering manufacturing costs while maintaining delivery reliability.
Data Source
AI summary
A method of coupling an extension set hub comprising a blunt cannula, with an infusion set comprising a base, an upper septum, a lower septum, and a septum cap enclosing said upper and lower septa, said septum cap comprising at least one radial port and at least one axial port, the method comprising the steps of affixing said base to a skin surface of a user, moving said extension set hub in a direction substantially parallel to said base until said blunt cannula passes through said radial port and between said upper septum and said lower septum within said septum cap, and rotating said extension set hub about said base until reaching a desired position.