Percutaneous Administration Device with Nested Needle and Adhesive Pad
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Solution Overview
Problem
Conventional percutaneous infusion devices are complex, requiring skilled techniques for setup and use, leading to potential needlestick injuries and inadequate administration of medicinal substances due to improper needle insertion depth, and are not suitable for self-administration at home.
Innovation Solution
A medical fluid delivery device with a lower assembly attached to the skin and an upper assembly that encloses the needle, allowing easy activation without visible needle penetration, featuring a releasable locking mechanism to maintain needle stability and a biasing member for secure insertion, and an adhesive layer for skin preparation and enhancement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional infusion devices are designed for hospital use by skilled clinicians, then the device can ensure proper needle insertion and medication delivery, but the device becomes complex and requires skilled techniques for setup and maintenance
Solution Approach 1:
The device is divided into two main assemblies: a lower assembly that attaches to the skin and an upper assembly that contains the needle and activates via button press. This segmentation allows each component to have a specialized function while simplifying the overall operation for self-administration.
Solution Approach 2:
The device is designed to be self-activating through a simple button press mechanism that automatically deploys the needle and initiates medication delivery. The releasable locking mechanism automatically secures the needle in place, eliminating the need for skilled clinician intervention during setup and maintenance.
2Loss of information
If the needle is made visible for patient awareness, then the patient can understand the device function, but the patient experiences fear and risk of needlestick injury
Solution Approach 1:
The needle is nested within the upper assembly housing, which encloses it during storage and transport. The needle is only exposed during the activation process when the upper assembly is pressed against the skin, and even then, it remains protected within the device structure. This nesting approach eliminates the need for the needle to be visibly exposed while maintaining device functionality.
3Manufacturing precision
If the needle insertion depth is precisely controlled, then the medication can be delivered to the correct tissue layer, but the insertion process requires skilled techniques and time
Solution Approach 1:
The device uses a predetermined needle length and depth configuration that is optimized for subcutaneous delivery. The upper assembly is designed to be pressed against the skin at a specific angle and depth, automatically achieving proper needle insertion without requiring the user to control insertion parameters manually. This parameter optimization ensures consistent delivery to the correct tissue layer while simplifying operation.
4Reliability
If the device requires multiple steps for skin preparation and securing, then the device can ensure proper placement and sanitation, but the process becomes time-consuming and complex
Solution Approach 1:
The lower assembly includes a pre-adhered skin pad that is already prepared and sanitized before use. The adhesive layer is pre-applied to the skin pad, eliminating the need for separate skin preparation steps. The user simply needs to attach the lower assembly to the cleaned skin area, and the device is ready for activation, significantly reducing setup time while maintaining proper placement and sanitation standards.
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
Facilitates easy, safe, and effective self-administration of medicinal substances by reducing fear and risk of needlestick injury, ensuring proper needle placement, and enhancing skin health through pre-administration active substances.
Implementation Method 1
an adhesive layer for skin preparation and enhancement
Implementation Method 2
delivering at least one first active substance to the skin prior to engagement of the upper assembly for preparing the skin for penetration
Data Source
AI summary
A medical delivery device is provided for delivering a medicinal substance into a user's body. An upper assembly includes a housing having a cavity configured for accommodating a needle. A lower assembly includes a receptacle member having an opening configured for accommodating insertion of the upper assembly, and a base member having an upper body and a recess formed on a top surface of the upper body for receiving the receptacle member. A base pad has an adhesive layer disposed on a lower surface of the pad, and being at least partially attached to a bottom side of the base member. The lower assembly is attached to a skin of the user using the base pad. As the upper assembly transitions from an upper position to a lower position relative to the lower assembly, the needle travels downwardly to penetrate the skin for facilitating administration of the medicinal substance.