Medication Delivery Base Part With Retractable Cannula
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Solution Overview
Problem
Existing medication delivery devices do not allow for subcutaneously positioned cannulas and sensors to be oriented differently on a single patch or mounting surface, and they do not enable the retraction of cannulas without removing the base part.
Innovation Solution
A base part with fastening means for a detachable reservoir/delivery part, allowing fluid flow between the reservoir and base part, and featuring openings for subcutaneously positioned cannulas and sensors, enabling the use of soft cannulas and providing a mechanism for cannula retraction without removing the base part.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single patch or mounting surface is used for subcutaneous positioning, then the device structure is simplified, but the cannulas and sensors cannot be oriented in different directions
Solution Approach 1:
The device is divided into a base part with mounting surface and a separate detachable reservoir/delivery part. The base part contains multiple openings for subcutaneous positioning of cannulas and sensors, while the reservoir part contains the medication reservoir and delivery mechanism. This segmentation allows the base part to remain on the patient's skin with multiple subcutaneous elements oriented in different directions, while the reservoir can be detached and reattached as needed.
2Ease of operation
If the cannula is integrated into the base part, then the cannula can be retracted, but the base part must be removed to retract the cannula
Solution Approach 1:
The device separates the base part (which remains on the patient's skin) from the reservoir/delivery part (which can be detached). The cannula is positioned such that its subcutaneous portion is anchored in the base part while the external portion can be retracted independently. This allows the cannula to be retracted by simply pulling on the external portion without removing the entire base part from the patient's skin.
3Adaptability or versatility
If a detachable reservoir/delivery part is used, then the device is more flexible, but the fluid connection between reservoir and base part must be reliably established and maintained
Solution Approach 1:
The base part includes pre-formed openings and fluid pathways that are ready to receive the reservoir/delivery part. The reservoir part includes corresponding connection features that align with these openings. When the reservoir part is attached to the base part, fluid-tight connections are automatically established through these pre-configured interfaces, ensuring reliable fluid flow without requiring additional assembly steps.
Data Source
AI summary
The invention concerns a base part for a medication delivery device, the base part comprising a connection part and a moveable part. The moveable part, which moves relative to the connection part, is capable of guiding fluid paths from a medication delivery port to a first cannula or sensor and a second cannula or sensor. The base part also comprises guiding means which can direct each cannula or sensor to its subcutaneous position.