Portable Ventilator Valve Oscillation for Mucus Mobilization
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Solution Overview
Problem
Conventional ventilators are ill-suited for portable applications due to cumbersome external components and lack sufficient response characteristics to generate high frequency oscillations necessary for effective mucus expulsion in patients with weakened respiratory systems, particularly those requiring breathing augmentation.
Innovation Solution
A portable patient ventilation apparatus with a valve that can switch between variable open and closed positions to induce oscillations during inspiratory and expiratory phases, utilizing a controller and flow sensor to regulate the valve positions and generate high frequency oscillations in the therapeutic breathing gas delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If conventional ventilators use large bore tubes and external components to deliver breathing gas, then sufficient gas delivery capacity is achieved, but the device becomes cumbersome and unsuitable for portable applications
Solution Approach 1:
The patent combines the valve, flow sensor, and controller into an integrated portable apparatus that can be worn by the patient. This merging of components eliminates the need for separate external equipment while maintaining the ability to deliver therapeutic breathing gas and generate oscillations for mucus mobilization.
Solution Approach 2:
The portable ventilator apparatus performs multiple functions: it delivers therapeutic breathing gas, generates high frequency oscillations for mucus mobilization, and monitors patient breathing through flow sensing. This multi-functionality consolidates what would traditionally require multiple separate devices into one portable unit.
2Speed
If conventional devices use vacuum pumps to generate reverse pressure for negative parts of oscillation, then high frequency oscillations are achieved, but the device becomes complex and less responsive
Solution Approach 1:
The patent replaces the mechanical vacuum pump system with an electronically controlled valve system. The valve can rapidly switch between open and closed positions under electronic control, generating the necessary pressure oscillations without requiring complex mechanical vacuum generation equipment. This substitution dramatically improves response time and simplifies the device.
Solution Approach 2:
The valve is controlled to switch periodically between open and closed positions, creating high frequency oscillations in the breathing gas flow. This periodic action generates the pressure variations needed for mucus mobilization through turbulent flow and flutter, achieving the therapeutic effect without vacuum pumps.
3Reliability
If high frequency oscillations are generated to mobilize mucus, then mucus expulsion is enhanced, but the valve must switch rapidly requiring precise control
Solution Approach 1:
The flow sensor provides real-time feedback about the actual gas flow through the patient circuit. The controller uses this feedback to adjust the valve positioning, ensuring that the desired oscillation frequency and amplitude are achieved. This closed-loop control maintains reliable mucus mobilization while adapting to patient breathing variations.
Solution Approach 2:
The valve positioning is dynamically adjusted based on real-time breathing conditions. The controller modulates the valve opening/closing timing and duration to optimize oscillation generation during different phases of the breathing cycle, enhancing mucus expulsion effectiveness while adapting to changing patient needs.
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 system effectively mobilizes mucus within the respiratory tract without the need for complex vacuum pumps, enhancing mucus expulsion and reducing the risk of pathogen growth, while being compact and wearable for portable use.
Implementation Method 1
high frequency pressure/airflow oscillations are selectively generated to mobilize secretions within a patient's respiratory tract
Implementation Method 2
induce turbulence or flutter resulting in pressure spikes that promote the movement of mucus
Data Source
AI summary
A patient ventilator secretion management system is disclosed. The system has a valve with an input in pneumatic communication with a therapeutic breathing gas source. The valve has variable positions, each of which corresponds to a specific flow rate of gas being output therefrom. A patient ventilation interface is in pneumatic communication with the valve over a gas delivery circuit. A controller in communication with the valve regulates the position thereof. The controller sequentially switches the valve from one of the variable positions to another to output a first range of fluctuating flow rates of gas for delivery to the patient ventilation interface during at least a selected one of patient expiratory and inspiratory phases.