Infant Inhalation Device Aerosol Control
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Solution Overview
Problem
Surfactant replacement therapy for premature babies faces challenges due to surfactant's low surface tension, unfavorable viscosity, and tendency to foam, making nebulization and aerosol application inefficient and costly, with high deposition losses and risks associated with intubation.
Innovation Solution
An inhalation therapy device with an aerosol generating system that produces liquid droplets of specific size (1.5-3 μm) and controlled respiratory air flow, minimizing dead volumes and deposition losses, and using a tubular intubation device to deliver the aerosol directly to the lungs, ensuring effective surfactant deposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If surfactant is administered via intubation and mechanical ventilation, then surfactant delivery to lungs is achieved, but risks of glottis injury, trachea injury, and pneumothorax increase
Solution Approach 1:
The patent uses a specialized aerosol generation system as an intermediary device to deliver surfactant. Instead of direct intubation, the surfactant is nebulized into an aerosol form that can be inhaled by the infant, mediating the delivery process to avoid mechanical trauma from tubes and ventilators while still achieving lung surfactant deposition
Solution Approach 2:
The patent replaces the mechanical intubation and ventilation system with a respiratory support system that maintains the infant's own breathing mechanics. The aerosol generation device substitutes for the invasive mechanical ventilation apparatus, allowing surfactant delivery while preserving the infant's natural respiratory drive and avoiding mechanical trauma
2Ease of operation
If surfactant is nebulized as aerosol, then non-invasive administration is achieved, but deposition losses increase and therapy efficiency decreases
Solution Approach 1:
The patent optimizes the physical parameters of aerosol generation, specifically controlling droplet size distribution and aerosol concentration. By adjusting nebulization parameters to produce droplets within an optimal size range, the system maximizes lung deposition efficiency while minimizing losses, making aerosol therapy viable for expensive surfactant
Solution Approach 2:
The patent incorporates feedback control mechanisms to monitor and adjust aerosol generation in real-time. This ensures optimal surfactant delivery efficiency by continuously adapting nebulization parameters to maintain effective deposition while minimizing waste of the expensive surfactant material
3Productivity
If aerosol generation amplitude and frequency are increased, then aerosol generation efficiency is improved, but surfactant foam formation increases
Solution Approach 1:
The patent employs dynamic control of aerosol generation parameters, adjusting amplitude and frequency in a coordinated manner rather than independently. This dynamic optimization allows the system to maintain high aerosol generation efficiency while staying below the threshold for excessive foam formation, adapting parameters in real-time to surfactant properties
Solution Approach 2:
The patent optimizes the relationship between nebulization amplitude and frequency parameters. By finding the optimal parameter combination specific to each surfactant formulation, the system achieves high aerosol generation efficiency while preventing foam formation that would reduce therapy effectiveness
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 device enables efficient and safe aerosol application of surfactant to premature babies, reducing surface tension in alveoli and improving oxygen uptake, while minimizing risks and deposition losses, thus providing a viable alternative to conventional surfactant administration methods.
Implementation Method 1
a piezoelectric oscillator 20 is provided, which is connected to the membrane 13 in such a way that the membrane can be vibrated with the aid of the piezoelectric oscillator 20
Implementation Method 2
the aerosol generator 11 includes a membrane 13, with the aid of which the liquid supplied from the reservoir is nebulized, so that the aerosol generator 11 releases a defined quantity of liquid droplets 2
Implementation Method 3
a device 3 for generating a respiratory air flow 4
Data Source
Figure 1
Figure 1a
Figure 2
AI summary
Inhalation therapy device with a breathing airflow generation unit (3) for generating a breathing airflow (4) and conveying the breathing airflow (4) into a supply line (32); a nebulization chamber (5) with a breathing air supply opening (51) to which the supply line (32) is connected and a section (52) forming an outlet opening (53) with a nozzle (54) for dispensing the liquid droplet/breathing air mixture from the nebulization chamber, and an aerosol generation unit (1) with a membrane (13) and a piezoelectric transducer that vibrates the membrane for nebulizing a fluid and providing liquid droplets; characterized in that the inhalation therapy device is designed to alternately switch the aerosol generation unit (1) on and off via a control signal to the piezoelectric transducer.to switch off, wherein the inhalation therapy device is designed to change ON/OFF switching phases of the aerosol generating device (1) and thereby adjust or set an output rate of the aerosol generating device.