Ventilatory Therapy With Probe Breaths for Airway Stability
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Solution Overview
Problem
Existing respiratory therapies, such as CPAP and non-invasive ventilation, face challenges in maintaining upper airway stability due to varying sleep states, posture, and disease progression, leading to inefficiencies and discomfort, particularly in patients with conditions like OSA and CSR.
Innovation Solution
A system that automatically adjusts the base pressure of ventilation therapy by detecting apneas and airway patency through respiratory flow rate analysis, delivering probe breaths, and adjusting the EPAP to maintain airway stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CPAP and non-invasive ventilation are used to treat respiratory disorders, then ventilatory support is provided to patients, but upper airway stability cannot be maintained due to varying sleep states, posture, and disease progression
Solution Approach 1:
The system dynamically adjusts the base pressure of ventilation therapy in response to detected apneas and airway patency changes. The controller automatically modifies EPAP levels based on real-time respiratory flow rate analysis, allowing the system to adapt to varying sleep states, posture changes, and disease progression, thereby maintaining upper airway stability throughout the night
Solution Approach 2:
The system continuously monitors respiratory flow rate and detects apneas through automated analysis. This feedback information is used to automatically adjust the base pressure settings, creating a closed-loop control system that responds to actual airway conditions rather than relying on fixed manual settings, thus improving both reliability and adaptability
2Adaptability or versatility
If manual adjustment of ventilation pressure is used, then device complexity is reduced, but adaptability to changing patient conditions deteriorates
Solution Approach 1:
The system performs self-adjustment of ventilation parameters through automated detection and control algorithms. The controller independently analyzes respiratory flow rates, detects apneas, and modifies pressure settings without requiring manual intervention, enabling the device to self-optimize based on real-time patient conditions while managing complexity through integrated design
3Reliability
If fixed base pressure ventilation is used, then ease of operation is improved, but effectiveness deteriorates due to inability to respond to apneas and airway changes
Solution Approach 1:
The system incorporates continuous feedback through automated respiratory monitoring and apnea detection algorithms. This enables the ventilation system to automatically respond to changing airway conditions and apneic events, maintaining effectiveness through adaptive pressure adjustment while simplifying operation through hands-free automated control
Solution Approach 2:
The system replaces manual mechanical adjustment mechanisms with automated electronic control algorithms. The controller uses software-based detection and analysis to automatically modify pressure settings, substituting the need for manual user intervention with intelligent automated systems that maintain ventilation effectiveness without compromising ease of use
Data Source
AI summary
Apparatus for treating a respiratory disorder in a patient comprises a pressure generator configured to deliver a flow of air at positive pressure to an airway of the patient through a patient interface, a sensor configured to generate a respiratory flow rate signal of the patient, and a controller. The controller may be configured to control the generator to deliver ventilation therapy having a base pressure and a pressure support through the patient interface, detect an apnea from the signal representative of respiratory flow rate of the patient, control the generator to deliver one or more probe breaths to the patient during the apnea, determine patency of the patient's airway from a waveform of the respiratory flow rate signal in response to one of the one or more probe breaths and adjust a set point for pressure of the ventilation therapy in response to the apnea.