Phasic Respiratory Therapy Gas Delivery
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Solution Overview
Problem
Conventional respiratory therapy devices are inefficient in providing ventilation, especially for non-intubated patients, and fail to effectively flush CO2 from anatomical deadspaces, leading to rebreathing and inadequate oxygen delivery.
Innovation Solution
A respiratory therapy system that delivers insufflation gas during the expiratory phase to flush CO2 from deadspaces, followed by oxygen-enriched gas during the inspiratory phase, using a transtracheal catheter and a gas delivery device with independent control valves for synchronized gas delivery, optimized for portable and home use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional respiratory therapy devices deliver oxygen continuously, then oxygen delivery is maintained, but oxygen consumption is excessive and ventilation effectiveness is reduced
Solution Approach 1:
The system delivers gases in periodic phases synchronized with the patient's breathing cycle: insufflation gas during expiratory phase and oxygen-enriched gas during inspiratory phase. This periodic delivery pattern reduces overall oxygen consumption while maintaining effective ventilation through coordinated phasic gas exchange
Solution Approach 2:
The breathing cycle is segmented into distinct phases with different gas delivery strategies: expiratory phase receives insufflation gas for deadspace flushing, while inspiratory phase receives oxygen-enriched gas for oxygenation. This segmentation allows optimized oxygen usage by delivering it only when needed during inspiration
2Object-generated harmful factors
If insufflation gas is delivered continuously, then deadspace flushing is improved, but oxygen consumption increases and breathing cycle synchronization is lost
Solution Approach 1:
Insufflation gas delivery is restricted to the expiratory phase only, creating a periodic pattern that flushes deadspace CO2 effectively while avoiding continuous oxygen consumption. The system switches to oxygen-enriched gas during the inspiratory phase, optimizing the timing of each gas type delivery to match physiological needs
3Productivity
If phasic gas delivery is implemented, then oxygen consumption is reduced and ventilation is maximized, but device complexity increases
Solution Approach 1:
The system utilizes the patient's own breathing cycle to trigger and synchronize gas delivery phases. The breathing movements themselves provide the timing signal for switching between insufflation and oxygen-enriched gas phases, eliminating the need for complex external synchronization mechanisms and reducing overall 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 approach minimizes oxygen consumption while maximizing ventilation, effectively reducing CO2 rebreathing and enhancing oxygenation, even in non-intubated patients, by utilizing a smaller quantity of oxygen and leveraging readily available insufflation gases like air.
Implementation Method 1
delivering a quantity of insufflation gas to the patient for a predetermined expiratory flushing period
Implementation Method 2
delivering a quantity of oxygen-enriched gas to the patient for a predetermined oxygen therapy period
Data Source
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AI summary
A respiratory therapy system that includes a gas delivery device enabled to deliver a quantity of oxygen-enriched gas and a quantity of insufflation gas is disclosed. The respiratory therapy system further provides a transtracheal catheter coupled to the gas delivery device. Additionally, the gas delivery device is enabled to deliver the quantity of insufflation gas during a first portion of a breathing cycle of a patient and to deliver the quantity of oxygen-enriched gas during a second portion of the breathing cycle.