Rotatable Infusion Set Transverse Coupling
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Solution Overview
Problem
Existing infusion devices face issues with cannula withdrawal during uncoupling, leading to potential incomplete or inadequate delivery of medicaments, and have structural limitations that impair wearer comfort and flexibility.
Innovation Solution
A rotatable connection system between structural parts allows for secure and easy coupling/uncoupling of the supply conduit transverse to the cannula's longitudinal axis, preventing unintentional cannula withdrawal and enabling flexible conduit management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the adapter part is removed from the infusion set in the axial direction of the cannula for uncoupling the supply conduit, then the coupling and uncoupling operation is simple, but there is a danger that the cannula may be withdrawn from the injection site unnoticed fully or partially
Solution Approach 1:
The patent changes the uncoupling direction from axial (along the cannula axis) to transverse (perpendicular to the cannula axis). The connector is designed with a coupling direction that is transverse to the longitudinal axis of the cannula, so that when the connector is removed, the cannula cannot be withdrawn accidentally. This dimensional change resolves the contradiction by making the uncoupling operation simple while ensuring cannula retention.
2Ease of manufacture
If the supply conduit is led away from the adapter part in a direction vertical to the direction of setting, then the device structure is standardized, but the device has a relatively high structure which impairs wearer comfort
Solution Approach 1:
The patent introduces a rotatable connection system between the first structural part (cannula holder) and the second structural part (connection port). This allows the supply conduit to be positioned flexibly in different directions while maintaining a compact overall structure. The rotatable mechanism enables the device to adapt to different wearing positions and body contours, improving wearer comfort while maintaining manufacturing standardization.
3Adaptability or versatility
If the adapter part is rotatable relative to the part bearing the cannula, then the device offers flexibility in positioning, but the device complexity increases
Solution Approach 1:
The patent divides the device into two separable structural parts: a first structural part bearing the cannula and a second structural part with the connection port. These parts can be coupled and uncoupled easily, and when coupled, they allow flexible positioning of the supply conduit. The segmentation principle reduces overall device complexity by allowing modular assembly while maintaining positioning flexibility through the rotatable connection between parts.
Data Source
AI summary
An arrangement for introducing a liquid into the body of a patient or for withdrawing a liquid from the body of a patient, including a first structural part carrying a cannula for positioning in the body of the patient, and a second structural part with a connection port for detachably coupling a conduit for supplying or withdrawing a liquid, wherein the first and second structural parts are connected, can be rotated relative to each another and in relative rotational positions form a channel for introducing a liquid from the conduit to the cannula or for withdrawing a liquid from the cannula to the conduit, and whereby movement of the conduit for coupling and uncoupling is transverse to the longitudinal axis of the cannula.