Optical Skin Patch Adherence Detection for Microneedle Absorption
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Solution Overview
Problem
The existing methods for delivering physiologically active substances through microneedle patches face challenges such as pain, skin damage, and inconsistent absorption due to inadequate adhesion of the patch to the skin, leading to reduced absorption rates of the substances.
Innovation Solution
An electronic device is used to measure skin condition by irradiating light onto the skin, detecting reflective light to assess moisture levels, and generating patch adherence information to determine the adhesive state of the patch, ensuring proper adhesion and absorption of the substances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If microneedle patch is adhered to skin manually, then the patch can be applied to skin, but the adhesion may be insufficient leading to reduced absorption rate of physiologically active substances
Solution Approach 1:
The patent implements a feedback mechanism where an optical sensor detects skin moisture levels and provides real-time information about patch adhesion quality. The system measures moisture content through light absorption changes and feeds this information back to indicate whether the patch is properly adhered, allowing users to verify absorption conditions without compromising the manual application simplicity.
2Reliability
If microneedles penetrate stratum corneum to reach epidermal or dermal layer, then physiologically active substances can be delivered into skin, but skin damage and pain may occur
Solution Approach 1:
The patent changes the physical parameters of the needle system by using microneedles with diameters of 10-100 micrometers, which is significantly smaller than traditional needles. This parameter change allows penetration of the stratum corneum barrier while minimizing damage to deeper skin structures and reducing pain perception, thereby maintaining delivery effectiveness while reducing harmful effects.
3Ease of operation
If patch adhesion is not firm, then application is simple, but physiologically active substances cannot be sufficiently absorbed into skin
Solution Approach 1:
The patent replaces mechanical adhesion verification methods with an optical detection system. Instead of relying on tactile or visual assessment of patch adhesion, the system uses light absorption measurements to detect skin moisture levels, which serve as an indirect indicator of proper patch contact and potential absorption. This substitution maintains application simplicity while providing reliable absorption assessment.
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
This method allows for effective adhesion and absorption of physiologically active substances by providing real-time patch adherence information, enhancing the delivery efficiency and user management of the patch.
Implementation Method 1
irradiating at least one light into skin to which a patch is adhered, detecting at least one reflective light based on an amount of moisture in the skin
Data Source
AI summary
A method for measuring skin by an electronic device is provided. The method for measuring skin by the electronic device includes an operation of irradiating at least one light into skin to which a patch is adhered, an operation of detecting at least one reflected light on the basis of an amount of moisture in the skin, which is changed by physiologically active substances injected through the patch, corresponding to the irradiated light, an operation of generating patch adherence information indicating a skin adhesive state of the patch on the basis of the detection result of the at least one reflected light and an operation of providing the generated patch adherence information to an output unit or a communication unit.