Ventilation System Volume Band Control
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Solution Overview
Problem
Current mechanical ventilation modes suppress natural variability in respiratory patterns, leading to discomfort and inadequate respiratory support, especially during weaning from ventilator support, as they fail to maintain safe volume limits and allow for appropriate tidal volume modulation.
Innovation Solution
A method and system for controlling mechanical lung ventilation that maintains inhaled volumes within a pre-established range by monitoring inspiratory volumes and adjusting pressure levels to ensure volumes remain within safe limits, allowing for natural variability while preventing insufficient or excessive air and oxygen inhalation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If controlled pressure mode is used to allow patient flow modulation, then patient comfort is improved, but tidal volume control is lost resulting in inadequate respiratory support
Solution Approach 1:
The system continuously monitors actual tidal volume delivered to the patient and uses this feedback to dynamically adjust the pressure support level. When volume exceeds the target range, the system reduces pressure support; when volume is below target, it increases pressure support. This closed-loop feedback mechanism enables the system to maintain precise volume control while preserving patient's natural flow modulation capability, thus resolving the contradiction between comfort and precision.
2Manufacturing precision
If volume controlled mode is used to ensure fixed tidal volume, then respiratory support precision is improved, but flow synchronization with patient effort is lost resulting in patient discomfort
Solution Approach 1:
The system dynamically switches between volume control and pressure control strategies based on real-time patient-ventilator interaction. During the inspiratory phase, it allows pressure-driven flow to synchronize with patient effort; during expiration, it enforces volume targets. This dynamic adaptation enables the system to maintain volume precision while accommodating patient's natural breathing rhythm, thereby resolving the contradiction between precision and comfort.
3Reliability
If pre-defined target volume is maintained to ensure safe ventilation limits, then ventilation safety is improved, but natural variability in breathing pattern is suppressed
Solution Approach 1:
The system segments the volume control into a target range rather than a single fixed value, allowing natural variability within safe boundaries. By defining a volume band with upper and lower limits around the target volume, the system maintains safety through boundary enforcement while permitting physiological variability within the band. This segmentation approach resolves the contradiction between safety and adaptability by allowing both simultaneously.
Data Source
AI summary
The present disclosure refers to a system to control mechanical lung ventilation with volume band, more particularly a system to manage respiratory cycles in patients. Preferably, said respiratory cycles are controlled under pressure, so that the volumes as inspired by the patient are maintained within a volume range, comprising a lower volume limit and an upper volume limit, which are previously determined.