Ventilator Inspiratory Pressure Control for Tidal Volume Maintenance
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Solution Overview
Problem
Mechanical ventilators in volume control mode often reduce inspiratory pressure in response to patient effort, potentially impeding respiratory effort and failing to maintain target tidal volume effectively.
Innovation Solution
A mechanical ventilator system with a pressure generator, sensors, and processors that dynamically adjust inspiratory pressure based on real-time gas and airway parameters to maintain target tidal volume without reducing pressure and impeding respiratory effort, using an airway model to generate multiple real-time pressure set points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If inspiratory pressure is reduced in response to patient effort during volume control mode, then the patient's muscular effort during inhalation is counteracted, but the respiratory effort may be impeded and target tidal volume may not be maintained effectively
Solution Approach 1:
The ventilator dynamically adjusts inspiratory pressure in real-time based on detected patient effort, transitioning from static pressure control to adaptive pressure modulation that responds to changing patient needs during the breath cycle
Solution Approach 2:
The system uses feedback from detected patient effort to continuously adjust inspiratory pressure, creating a closed-loop control mechanism that balances supporting patient effort while maintaining target tidal volume delivery
2Reliability
If inspiratory pressure is maintained at target levels despite patient effort, then target tidal volume is maintained, but the patient's respiratory effort is impeded
Solution Approach 1:
The system changes the pressure parameter dynamically during the inspiratory phase based on detected patient effort, allowing pressure to deviate from target levels temporarily to accommodate patient effort while ensuring overall tidal volume targets are met
3Ease of operation
If pressure is reduced to counteract patient effort, then patient comfort during inhalation is improved, but ventilation effectiveness may be compromised
Solution Approach 1:
The ventilator employs dynamic pressure adjustment that adapts to patient effort in real-time, creating a responsive system that balances comfort with ventilation effectiveness rather than using fixed pressure reduction
Solution Approach 2:
The system monitors patient effort and uses this feedback to modulate pressure appropriately, ensuring that pressure reduction for comfort does not compromise the overall ventilation delivery and tidal volume targets
Data Source
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AI summary
The present disclosure pertains to a mechanical ventilator system configured to deliver a pressurized flow of breathable gas to the airway of a subject. The system is configured to generate the pressurized flow of breathable gas according to a volume control mode therapy regime that delivers a target tidal volume to the subject during inhalation. During an individual inhalation, the system is configured to determine and/or adjust an inspiratory pressure level of the pressurized flow of breathable gas of the volume control mode therapy regime. The inspiratory pressure level is adjusted such that during the inhalation the inspiratory pressure level is not reduced to impede respiratory effort by the subject responsive to the target tidal volume being exceeded during the inhalation. The system comprises one or more of a pressure generator, a subject interface, one or more sensors, one or more processors, a user interface, electronic storage, and/or other components.