Dissolvable Microneedle Tip Loading for Efficient Skin Delivery
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Solution Overview
Problem
Conventional microneedle arrays suffer from inefficient drug delivery due to homogeneous distribution of active components, resulting in significant waste and reduced effective delivery capacity.
Innovation Solution
The development of dissolvable microneedle arrays with active components localized in the needle tips, utilizing unique geometries and fabrication methods such as sequential micro-molding and spin-drying, reduces waste and enhances delivery efficiency by concentrating bioactive agents in the skin-penetrating portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If active components are homogeneously distributed in microneedle arrays, then manufacturing is simplified, but delivery efficiency decreases and waste increases
Solution Approach 1:
The patent applies local quality by concentrating active components specifically in the needle tips rather than homogeneous distribution. The micro-molding process creates zones of high active component concentration at the tips where penetration occurs, while the shafts contain minimal active components. This localized distribution maintains manufacturing simplicity through a single-step process while dramatically improving delivery efficiency by ensuring active components are positioned exactly where needed for skin penetration.
2Productivity
If active components are concentrated in needle tips, then delivery efficiency improves, but manufacturing complexity increases
Solution Approach 1:
The patent employs preliminary action by incorporating active components into the microneedle structure during the initial micro-molding fabrication step, rather than requiring subsequent complex assembly or coating processes. The micro-molding technique allows active components to be embedded in the needle tips during mold preparation, creating the concentrated distribution pattern in advance. This preliminary incorporation simplifies the overall manufacturing process while achieving the desired localized concentration for improved delivery efficiency.
3Manufacturing precision
If homogeneous distribution is used, then manufacturing precision requirements are reduced, but active component waste increases
Solution Approach 1:
The patent applies local quality by creating spatially varying concentrations of active components, with high concentration in the needle tips and low concentration in the shafts. The micro-molding process achieves this by controlling the molding parameters to concentrate active components in the tip regions during fabrication. This localized distribution dramatically reduces active component waste by ensuring materials are placed only where needed for drug delivery, while maintaining reasonable manufacturing precision requirements through the robust micro-molding technique.
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 approach significantly improves drug delivery efficiency by minimizing waste, increasing active component concentration in the needle tips, and enabling simultaneous co-delivery of multiple agents for enhanced immune responses and therapeutic applications.
Implementation Method 1
The microneedle array delivery platforms can be used to deliver a broad range of bioactive components to a patient
Implementation Method 2
The systems and methods disclosed herein include cutaneous delivery platforms based on dissolvable microneedle arrays
Data Source
AI summary
Methods are provided for promoting, reducing, or desensitizing various immune responses by delivery of sub-immunogenic doses of an allergen, alone or with other agents, or by delivery of antigens and adjuvants to a cutaneous microenvironment of a subject. Microneedle arrays can be used in connection with this delivery.