Fluid Delivery Device With Adhesive Cannula And Needle Guide
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Solution Overview
Problem
Existing fluid delivery devices require frequent skin puncture for medication administration, which is inconvenient and painful, especially for extended periods.
Innovation Solution
A fluid delivery device comprising a body, a cannula, a needle guide, and a septum, configured to adhere to the skin with an adhesive layer, allowing for extended use without repeated needle punctures, featuring a design where the injection needle can exit into an open space within the device or contact a tapered portion, preventing re-penetration and facilitating medication delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a needle is used for frequent skin puncture to deliver medication, then medication can be administered, but user convenience deteriorates and discomfort increases
Solution Approach 1:
The cannula is inserted into the skin beforehand and remains in place, allowing multiple medication deliveries without repeated punctures. The insertion device performs the initial skin penetration action in advance, creating a permanent access route that eliminates the need for subsequent puncture actions.
Solution Approach 2:
The cannula serves as an intermediary component between the external injection needle and the internal tissue space. It provides a pre-established通道 that allows medication delivery without requiring the needle to repeatedly penetrate the skin, thus mediating between the injection mechanism and the target tissue.
2Ease of operation
If a cannula is inserted to allow continuous fluid delivery, then ease of operation improves, but device complexity increases
Solution Approach 1:
Multiple functional components (body, cannula, needle guide, and septum) are merged into a single integrated fluid delivery device. This combination allows continuous fluid delivery while consolidating what would otherwise be separate components into one cohesive unit, managing the complexity through integration rather than multiplication of separate parts.
Solution Approach 2:
The device is designed to perform multiple functions: the body provides structural support and fluid storage, the cannula enables skin penetration and continuous access, the needle guide ensures proper needle positioning, and the septum allows repeated needle insertions. This multi-functionality within a single device structure achieves continuous fluid delivery without requiring multiple separate components.
3Reliability
If the septum is designed to prevent needle re-penetration, then reliability improves, but device complexity increases
Solution Approach 1:
The needle guide incorporates a localized tapered portion with specific geometric properties that create a mechanical barrier against needle re-penetration. This local structural feature, rather than requiring a complex overall device redesign, provides the reliability function by creating a zone of increased resistance in the specific location where needle re-insertion would occur.
Solution Approach 2:
The tapered portion of the needle guide creates an asymmetric geometry that allows needle insertion in one direction while preventing re-penetration in the same direction. The asymmetric shape provides a mechanical stop or increased resistance path that reliability prevents the needle from re-entering the septum after initial penetration, while maintaining ease of initial insertion.
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
Enables prolonged medication administration without frequent skin punctures, enhancing user convenience and reducing discomfort by allowing continuous fluid delivery through a single skin insertion.
Implementation Method 1
The fluid delivery device is configured to adhere to a living being's skin
Data Source
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AI summary
Fluid delivery devices, systems and methods. Some of the fluid delivery devices include a body, a cannula and a septum, and are suited for enabling the delivery of fluid to a user.