Aerosolizing Device for Uniform Sample Wetting
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Solution Overview
Problem
Current methods for exposing epithelial cells at the air-liquid interface to aerosolized substances are inefficient, with low deposition rates, non-uniform distribution, and high operational complexity, limiting their use in pharmaceutical and toxicity studies, especially for larger aerosol particles and liquid aerosols.
Innovation Solution
A device and method that generate an aerosol cloud without external airflow, allowing it to descend and form a mist for uniform distribution on samples, using a nebulizer positioned above the sample to create a cloud with sufficient density and initial velocity for rapid and homogeneous wetting, achieving high deposition efficiency and reproducibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If aerosol is transported by air flow to cells, then transport efficiency is improved, but deposition uniformity deteriorates
Solution Approach 1:
The patent removes the air flow transport mechanism from the system entirely. Instead of using air flow to carry aerosol to cells, the aerosol is generated directly above the cell culture and allowed to settle under gravity, eliminating the source of non-uniform deposition while maintaining efficient transport.
Solution Approach 2:
The patent inverts the conventional approach by positioning the aerosol generator above the cells rather than below or to the side. This upward-to-downward orientation allows gravity to assist aerosol settlement onto the cells, improving both transport efficiency and deposition uniformity simultaneously.
2Reliability
If aerosol deposition relies on diffusion and sedimentation, then deposition occurs, but deposition rate is too slow
Solution Approach 1:
The patent employs a nebulizer device that uses pneumatic principles to generate aerosol. The nebulizer creates fine droplets through high-velocity gas flow, producing an aerosol with optimal characteristics for rapid settlement onto cells while maintaining high deposition rates.
Solution Approach 2:
The patent optimizes aerosol parameters including particle size distribution, concentration, and initial velocity by adjusting nebulizer operating conditions. These parameter changes enable the aerosol to settle rapidly onto cells through gravity while maintaining uniform distribution, achieving both reliable deposition and high deposition rates.
3Productivity
If electrostatic charging is used for aerosol deposition, then deposition efficiency is improved, but device complexity increases
Solution Approach 1:
The patent removes the electrostatic charging component entirely from the system. By relying on gravity-driven settlement of aerosol generated by a simple nebulizer, the system achieves adequate deposition efficiency without the complexity of electrostatic fields, charging mechanisms, and associated control systems.
4Speed
If direct spraying is used for aerosol application, then application speed is improved, but distribution uniformity deteriorates
Solution Approach 1:
The patent positions the aerosol generator in a centralized location above the cell culture surface, creating a radially symmetric aerosol distribution pattern. This geometric arrangement allows aerosol to settle uniformly across the entire cell surface from a central source, achieving both rapid application and uniform distribution.
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 enables fast, efficient, and uniform coating of samples with aerosols, achieving high deposition efficiencies (70-95%) and reproducibility, reducing exposure time to minutes, and allowing for accurate dosimetry and biological response analysis.
Implementation Method 1
generate an aerosol cloud without external airflow, allowing it to descend and form a mist for uniform distribution on samples
Implementation Method 2
create a cloud with sufficient density and initial velocity for rapid and homogeneous wetting, achieving high deposition efficiency
Data Source
AI summary
A device for wetting at least one sample by means of an aerosol, the device has: side walls, a base region which is bounded by the side walls, the base region adapted for receiving or interacting with a positioning device for positioning the sample, a cover region, which sits vertically opposite the base region and is bounded by the side walls. The device forms an exposure chamber and an aerosolizing device for producing an aerosol, which is arranged in the vicinity of the cover region. The aerosolizing device is arranged above the base region in such a way that the aerosolizing device at least partially covers the base region in a vertical plan view. A method for wetting at least one sample by an aerosol is also provided that includes the steps of: providing at least one sample, producing a cloud above the at least one sample in a position which at least partially covers the base region in a vertical plan view, and allowing the cloud to descend in the direction of the sample.