Volume-Targeted Minimum Pressure-Control Ventilation for Acute Lung Injury
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Solution Overview
Problem
Current ventilator systems face challenges in providing effective ventilation strategies for patients with acute lung injuries, such as ARDS and H1N1, as they require customized settings and can be uncomfortable, leading to sedation and increased costs, and existing modes like BiLevel ventilation are complex for clinicians to manage.
Innovation Solution
The development of a volume-targeted minimum pressure-control (VCI) breath type that combines benefits of VC+ and BiLevel ventilation, allowing clinicians to set a tidal volume with adjustable pressure support and inverse I:E ratios greater than 4:1, enabling patients to trigger inspirations and providing pressure support during exhalation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If volume-targeted pressure control (VC+) is used to deliver tidal volume, then ventilation precision is improved, but pressure support may be insufficient for patients with acute lung injuries
Solution Approach 1:
The patent merges volume-targeted pressure control (VC+) with airway pressure release ventilation (APRV) to create a hybrid mode that delivers precise tidal volumes while maintaining sufficient pressure support. The system calculates required pressure based on delivered volume and patient compliance, then applies pressure release ventilation principles to ensure adequate pressure support during inspiration and exhalation phases.
2Stress or pressure
If BiLevel ventilation is used to provide pressure support, then pressure support is improved, but device complexity increases making it difficult for clinicians to manage
Solution Approach 1:
The system automatically calculates patient compliance and determines optimal pressure settings based on delivered tidal volumes and patient response. The ventilator self-adjusts inspiration and exhalation pressures without requiring complex manual configuration by clinicians, reducing operational complexity while maintaining effective pressure support.
3Ease of operation
If conventional ventilation modes are used, then ease of operation is maintained, but patient comfort deteriorates leading to sedation requirements
Solution Approach 1:
The system dynamically adjusts ventilation parameters including inspiration pressure, exhalation pressure, and tidal volume based on real-time patient compliance measurements. This dynamic adaptation allows the ventilator to respond to patient needs without requiring complex manual intervention, maintaining ease of operation while significantly improving patient comfort and reducing sedation requirements.
4Manufacturing precision
If tidal volume is strictly controlled, then ventilation precision is improved, but adaptability to patient needs deteriorates
Solution Approach 1:
The system continuously monitors delivered tidal volumes and patient compliance, using this feedback to automatically adjust pressure settings and ventilation parameters. This closed-loop feedback mechanism maintains precise tidal volume control while adapting to changing patient needs and lung compliance, resolving the contradiction between precision and adaptability.
Data Source
AI summary
The systems and methods include providing a volume-targeted minimum pressure-control breath type during ventilation of a patient. The system and methods provide a novel breath type that allows an operator to input a tidal volume and receive some of the benefits of utilizing an airway pressure release ventilation (APRV) breath type in combination with some of the benefits of utilizing a volume-targeted-pressure-control (VC+) breath type.