Perfusion Chamber Membrane for Lung Dissolution Analysis
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Solution Overview
Problem
Current methods for studying the dissolution of dry powder drugs in lung tissues are inaccurate, unreliable, and fail to simulate the physiological interactions of drug particles with lung fluids and cells effectively, leading to incomplete understanding of drug fate and potential redistribution or degradation.
Innovation Solution
A device comprising a perfusion chamber with a semi-permeable membrane and a sheet formed organ coated with particles, mimicking the air/blood barrier, where a perfusion fluid flows along the membrane to simulate lung conditions, allowing for the study of particle dissolution and absorption, and incorporating a physicochemical or biological barrier to resemble lung tissue, enabling accurate analysis of drug interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If indirect methods are used to measure dissolution of soluble particles in the lungs (such as appearance of solute in circulation), then measurement is feasible, but measurement precision and reliability are insufficient
Solution Approach 1:
The invention creates a simplified in vitro model that copies the essential features of the lung air-blood barrier using a polycarbonate membrane with porous structure. This model system replicates the dissolution and absorption process without requiring complex in vivo measurements, achieving accurate dissolution rate measurements through a controlled laboratory setup that mimics physiological conditions.
Solution Approach 2:
The polycarbonate membrane acts as an intermediary that simulates the lung air-blood barrier. It provides a controlled interface between the particle suspension (representing lung tissue) and the perfusion fluid (representing blood), enabling precise measurement of dissolution rates while maintaining physiological relevance without the complexity of direct in vivo measurement.
2Adaptability or versatility
If simple dissolution models are used, then device complexity is reduced, but they fail to simulate physiological interactions with lung fluids and cells
Solution Approach 1:
The invention applies local quality by creating distinct functional zones: the polycarbonate membrane provides structural support and porosity control, the particle suspension layer simulates lung tissue with specific physiological properties, and the perfusion fluid system mimics blood flow. Each zone has optimized properties for its specific function, enabling comprehensive physiological simulation while maintaining manageable system complexity.
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 device provides a more accurate and reliable method to determine the dissolution rate of airborne particles, allowing for the evaluation of drug candidates and formulations for respiratory administration, simulating the natural process of the air/blood barrier and enabling the analysis of drug behavior and appearance in the circulatory system.
Implementation Method 1
A semi-permeable membrane, coated on one side with a barrier layer, is arranged to be in fluid contact with the perfusion fluid
Implementation Method 2
The barrier can constitute either a physicochemical- or a biological barrier adapted to resemble or mimic a natural membrane of epithelial cells in the lungs
Implementation Method 3
The perfusion flow will receive the agent dissolved and diffused through the barrier layer and membrane
Data Source
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AI summary
An arrangement and a method for studying the dissolution of particles in the air/blood barrier of the respiratory tract. A device for simulating the interaction of particles (203) delivered to the air/blood barrier of the respiratory tract comprises: a perfusion chamber (101) adapted to receive and deliver a flow of perfusion fluid; a semi permeable membrane (205) coated on one side with a barrier layer (204) adapted to interact with the particles; and a first sheet formed organ (202) having a surface distributed with the particles. The membrane (205) is arranged to be a fluid contact with the perfusion fluid, while the first sheet formed organ (202) is arranged to contact the barrier layer (204) of the membrane (205), in order to simulate the dissolution of the particles (203) in the air/blood barrier when perfusion fluid flows through the perfusion chamber (101), along the membrane (205). Providing a flow of perfusion fluid along the membrane simulates more accurately the natural process of the air/blood barrier.