Pulsating Aerosol Therapy Device for Sinus Penetration
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Solution Overview
Problem
Current aerosol therapy devices inadequately deliver aerosols to the paranasal sinuses and central nervous system due to anatomical constraints and the impermeability of the blood-brain barrier, limiting the effectiveness of treatments for sinusitis and CNS disorders.
Innovation Solution
An aerosol therapy device that generates a pulsating airflow with a pressure field, utilizing a twin-port nosepiece and various air flow supply devices, including piezoelectric and thermopneumatic systems, to increase aerosol penetration through the ostia and deliver active agents to the paranasal sinuses and CNS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a continuous aerosol flow is used for nasal therapy, then the aerosol can be delivered to the nasal cavity, but the aerosol cannot effectively penetrate through the small ostia of the paranasal sinuses due to anatomical constraints
Solution Approach 1:
The patent applies periodic action by using a pulsating airflow instead of continuous flow. The airflow is modulated at specific frequencies (e.g., 2-10 Hz) to create pressure oscillations that resonate with the paranasal sinuses, enhancing aerosol penetration through the small ostia. This periodic modulation allows the aerosol to effectively reach the sinuses despite anatomical constraints.
Solution Approach 2:
The patent employs mechanical vibration principles by creating oscillating pressure fields through pulsating airflow. The vibration frequency is tuned to match the natural resonance frequency of the paranasal sinuses, which enhances the oscillation of air through the ostia and improves aerosol deposition in the sinus cavities.
2Quantity of substance
If the blood-brain barrier is impermeable, then it protects the CNS from harmful substances, but it prevents aerosol delivery of therapeutic agents to the CNS
Solution Approach 1:
The patent uses the nasal cavity and olfactory region as an intermediary pathway to bypass the blood-brain barrier. By delivering aerosols directly to the olfactory epithelium and CNS through the nasal passages, the therapy circumvents the impermeable blood-brain barrier and achieves direct CNS targeting.
Solution Approach 2:
The patent transitions from systemic delivery (through bloodstream) to direct local delivery via the nasal-CNS pathway. This dimensional change in delivery route allows therapeutic agents to reach the CNS directly through the nasal mucosa and olfactory nerve pathways, avoiding the blood-brain barrier limitation.
3Quantity of substance
If pressure oscillations are applied to enhance aerosol penetration, then aerosol can reach the paranasal sinuses, but the device complexity increases due to additional components needed to generate pressure fluctuations
Solution Approach 1:
The patent applies multi-functionality by using a single airflow source that simultaneously generates both the aerosol flow and the pressure oscillations. The airflow generator is configured to produce pulsating flow that serves dual purposes: transporting aerosol and creating resonant pressure oscillations for enhanced sinus penetration, thereby avoiding additional complex components.
Solution Approach 2:
The patent merges the aerosol generation function and pressure oscillation generation function into a single integrated system. The airflow source is designed to produce both the carrier gas flow and the modulating pressure waves, combining multiple functions into one component to reduce overall device 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
Enhanced aerosol deposition in the paranasal sinuses and CNS, facilitating improved treatment outcomes for sinusitis and CNS disorders by optimizing aerosol delivery through the use of pulsating airflow and pressure fields.
Implementation Method 1
The device can comprise a piezoelectric element which transforms electrical energy to mechanical energy and thus generates high frequency pulses of air which consist of oscillating pressure fields
Implementation Method 2
The device can comprise a thermopneumatic system which transforms thermal energy to mechanical energy
Implementation Method 3
Due to its anatomical structure, it is thought that the sinus cavity behaves like a kind of Helmholtz resonator, which is a container of gas with an open hole at the end of a neck. Such a container has a specific resonance frequency wherein the air within the neck (airplug) will be most easily moved. An outside variation in air pressure causes the air plug in the neck (i.e., the ostia of the sinuses) to oscillate in and out.
Data Source
AI summary
The present invention relates to an aerosol therapy device, wherein an aerosol is generated in an aerosol generating device and is supplied through a nosepiece to a patient's nasal cavities via a single pulsed main aerosol flow.