Optimized Proportional Assist Ventilation for Patient Effort Control
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Solution Overview
Problem
Current proportional assist ventilation (PA) systems require operator input for percent support settings, leading to potential patient effort imbalances, resulting in muscle fatigue or atrophy due to inadequate or excessive effort, and lack the ability to dynamically adjust ventilation parameters to maintain desired treatment metrics.
Innovation Solution
The introduction of an optimized proportional assist (OPA) breath type, which calculates and delivers a target airway pressure based on a desired patient effort range, allowing the ventilator to adjust the percent support setting to maintain patient effort within a specified range and optimize treatment metrics by periodically recalculating and adjusting the airway pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If proportional assist ventilation uses fixed percent support settings based on operator input, then the system is simple to operate, but patient effort becomes unbalanced leading to muscle fatigue or atrophy
Solution Approach 1:
The ventilator continuously monitors patient effort through flow sensors and dynamically adjusts the percent support setting based on real-time feedback about actual patient effort levels, preventing both muscle fatigue and atrophy by maintaining effort within target ranges
Solution Approach 2:
The system transitions from static, operator-defined percent support settings to dynamic, automatically adjusting settings that adapt in real-time to patient needs, allowing the ventilation support level to change continuously based on measured patient effort
2Device complexity
If proportional assist ventilation uses manual percent support settings, then the device complexity is low, but the system cannot dynamically adjust to maintain desired treatment metrics
Solution Approach 1:
The ventilator system performs self-adjustment by automatically calculating and modifying percent support settings based on real-time patient effort measurements, eliminating the need for continuous manual intervention while maintaining optimal treatment metrics
Solution Approach 2:
The system dynamically changes the percent support parameter based on real-time patient effort measurements and pre-defined target ranges, allowing automatic adaptation of ventilation parameters to maintain desired treatment outcomes
3Device complexity
If the ventilator delivers fixed target airway pressure, then the control system is simple, but patient effort varies leading to inadequate or excessive muscle work
Solution Approach 1:
The system uses feedback from flow sensors to continuously measure patient effort and automatically adjusts target airway pressure to maintain patient effort within a desired range, preventing both inadequate and excessive muscle work
Solution Approach 2:
The target airway pressure transitions from a fixed value to a dynamically adjusted parameter that changes in real-time based on patient effort measurements, ensuring optimal patient effort throughout the ventilation process
Data Source
AI summary
This disclosure describes systems and methods for providing an optimized proportional assist breath type during ventilation of a patient. The disclosure describes a novel breath type that delivers a target airway pressure calculated based on a desired patient effort range to a triggering patient.