Breathing Gas Supply System with Dynamic Mode Switching
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Solution Overview
Problem
Current ventilation systems lack a comprehensive solution for providing high flow rates while seamlessly switching between pressure-supported and pressure-controlled ventilation modes, which can lead to high peak pressures and inadequate support for patients.
Innovation Solution
A system comprising a breathing gas source, control unit, pressure control module, flow control module, pressure sensor device, flow sensor device, and user interface that alternately activates these components to manage breathing gas pressure and flow, incorporating a humidifier, oxygen source, and nebulizer to support spontaneous breathing with adjustable oxygen admixture and heating, ensuring efficient gas exchange and reduced breathing effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If volume-controlled ventilation is used to deliver a set tidal volume, then the minute ventilation can be calculated from tidal volume and respiratory rate, but high peak pressures can occur and a maximum pressure alarm limit must be set
Solution Approach 1:
The system dynamically switches between volume-controlled and pressure-supported ventilation modes based on real-time patient respiratory parameters. The control unit monitors respiratory effort and adjusts the ventilation mode accordingly, allowing the system to adapt to changing patient needs and avoid sustained high peak pressures while maintaining effective minute ventilation.
Solution Approach 2:
The system changes the control parameter from fixed tidal volume to variable pressure support levels. By adjusting the pressure support level rather than maintaining a fixed volume, the system can deliver adequate ventilation while preventing excessive peak pressures, as the pressure is actively controlled and adjusted during the breath.
2Object-affected harmful factors
If pressure-supported ventilation is used to support patient respiratory drive, then high peak pressures cannot occur and breathing is gentler, but the system cannot provide high flow rates
Solution Approach 1:
The system dynamically adjusts the ventilation mode based on real-time respiratory parameters. When high flow rates are needed, the system switches to volume-controlled mode; when pressure support is preferred, it switches to pressure-supported mode. This dynamic adaptation allows the system to provide both high flow rates and gentle pressure-supported ventilation as needed.
Solution Approach 2:
The system combines multiple ventilation modes (volume-controlled and pressure-supported) within a single device, allowing it to perform both high flow rate delivery and gentle pressure support. The control unit integrates both control strategies and switches between them based on patient needs, making the system universally applicable to different ventilation requirements.
3Ease of operation
If a single ventilation mode is used, then the system is simple to operate, but it cannot seamlessly switch between pressure-supported and pressure-controlled ventilation to address different patient needs
Solution Approach 1:
The system automatically monitors patient respiratory parameters and self-adjusts the ventilation mode without requiring manual intervention. The control unit continuously evaluates respiratory effort and switches between ventilation modes autonomously, maintaining ease of operation while achieving high adaptability to different patient needs.
Solution Approach 2:
The system uses real-time feedback from respiratory sensors to automatically adjust the ventilation mode. The control unit receives continuous data on respiratory parameters and uses this feedback to determine when to switch between volume-controlled and pressure-supported modes, achieving adaptability while keeping the user interface simple.
Data Source
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AI summary
The invention relates to a system for supplying breathing gases, comprising a breathing gas source, a control unit, a pressure control module, and a flow control module, wherein a pressure sensor device, a flow sensor device, and a user interface for specifying parameters of the breathing gas supply or for exchanging data are also provided. The control unit alternately activates the pressure control module and the flow control module, wherein the pressure control module controls the breathing gas source to specify a breathing gas pressure in the range of 0 to 90 mbar, and wherein the flow control module controls the breathing gas source to specify a breathing gas flow rate in the range of 0 to 90 l/min.