Microneedle Application Device with Force Feedback Sensing
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Solution Overview
Problem
The challenge in microneedle application technology lies in ensuring proper device positioning to avoid operator error and variability across different skin sites, which affects the consistent delivery of therapeutic molecules and data reliability in research contexts.
Innovation Solution
A microneedle application device equipped with a feedback sensor that generates output corresponding to forces between the skin and the device, allowing for precise positioning and orthogonal array deployment, thereby enhancing the consistency and reliability of microneedle array application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If microneedle applicator devices are used without feedback sensing, then the device complexity is reduced, but the positioning precision and reliability of microneedle array deployment deteriorate due to operator error and variability across different skin sites
Solution Approach 1:
The patent implements feedback sensing through force sensors that detect the interaction forces between the microneedle applicator device and the skin surface. The sensors provide real-time feedback signals to a control system that adjusts the device positioning and microneedle deployment to maintain optimal force levels, thereby improving positioning precision while managing device complexity through automated control.
Solution Approach 2:
The patent replaces manual mechanical positioning with an automated control system that uses force sensor feedback to electronically adjust the device position and deployment parameters. This substitution of mechanical manual adjustment with sensor-based automated control improves positioning precision while the complexity is managed through software control algorithms.
2Reliability
If microneedle arrays are deployed without force feedback, then the ease of operation is improved, but the reliability of molecule transport and data consistency deteriorates due to improper deployment and operator error
Solution Approach 1:
The force feedback system continuously monitors the interaction forces during microneedle deployment and provides real-time signals to the control system. This feedback enables automated adjustment of deployment parameters to ensure proper microneedle penetration and molecule transport, thereby improving reliability while the automated control maintains ease of operation by reducing the need for operator skill and judgment.
Solution Approach 2:
The microneedle applicator device performs self-adjustment based on force sensor feedback, automatically correcting positioning and deployment parameters without requiring continuous manual intervention. This self-service capability improves reliability by ensuring consistent proper deployment while maintaining ease of operation as the system autonomously manages the deployment process.
3Measurement precision
If force sensing is implemented in the microneedle applicator device, then the measurement precision of application forces is improved, but the device complexity increases due to additional sensors and control systems
Solution Approach 1:
The force sensors provide measurement precision by detecting interaction forces between the device and skin. The sensor signals are fed back to a control system that uses this precise force information to automatically adjust deployment parameters, thereby achieving accurate force measurement while managing device complexity through automated feedback control that eliminates the need for complex manual monitoring and adjustment mechanisms.
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
The solution provides real-time feedback for proper device orientation and force distribution, ensuring consistent microneedle array deployment and improving data reliability across various skin sites, facilitating more effective transdermal delivery of therapeutic agents.
Implementation Method 1
The feedback sensor is capable of generating an output corresponding to forces between the target skin location and the microneedle application device
Data Source
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Figure 4B
AI summary
A microneedle application device for moving a microneedle array toward a target skin location includes a feedback sensor. The feedback sensor is operably connected to the microneedle application device, and is capable of generating an output corresponding to forces between the target skin location and the microneedle application device.