CPAP Ventilator Valve Adaptation for Spontaneous Breathing Loss
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Solution Overview
Problem
Existing ventilators require time-consuming and error-prone conversions to switch between leakage and valve hose systems, limiting their versatility and making CPAP therapy dependent on spontaneous breathing, which can lead to reduced gas exchange and patient risk when spontaneous breathing decreases.
Innovation Solution
A ventilator with a control unit that determines the breathing phase and adjusts pressure settings to maintain constant CPAP pressure, increasing IPAP as needed to ensure minimum ventilation, using sensors to monitor tidal volume and breathing effort, and a valve system that adapts to breathing phases without requiring adapter modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a ventilator is designed to support both leakage and valve hose systems, then adaptability is improved, but device complexity increases due to multiple connection ports and pressure ports
Solution Approach 1:
The ventilator is designed with a universal connection system that can accommodate both leakage hose systems and valve hose systems through a single standardized connection interface. The control unit automatically detects the hose type and adjusts operating parameters accordingly, eliminating the need for separate connection ports for different hose systems while maintaining full compatibility with both types.
2Adaptability or versatility
If adapters are installed to switch between hose systems, then adaptability is improved, but ease of operation deteriorates due to time-consuming installation and error-prone conversion
Solution Approach 1:
The ventilator incorporates automatic detection functionality that identifies the connected hose type (leakage or valve system) without requiring manual configuration or adapter installation. The control unit autonomously adjusts operating parameters and valve control signals based on the detected hose type, enabling seamless switching between hose systems through simple physical connection without any conversion steps.
3Ease of operation
If CPAP mode requires a leakage hose system, then ease of operation is improved, but adaptability deteriorates because CPAP cannot be used with valve hose systems
Solution Approach 1:
The ventilator implements dynamic control of the exhalation valve that adapts to different hose systems during CPAP therapy. When a valve hose system is detected, the control unit dynamically adjusts valve opening timing and duration to maintain continuous gas flow and CO2 elimination, enabling CPAP therapy with valve hose systems through real-time parameter adaptation while preserving the simplicity of CPAP operation.
4Ease of operation
If spontaneous breathing is required for gas exchange in CPAP mode, then ease of operation is improved, but reliability deteriorates when spontaneous breathing decreases leading to reduced gas exchange
Solution Approach 1:
The ventilator incorporates feedback mechanisms through sensors that continuously monitor respiratory parameters such as flow, pressure, and tidal volume. When spontaneous breathing decreases and gas exchange becomes insufficient, the control unit receives feedback signals and automatically adjusts support levels, transitioning from pure CPAP mode to assisted ventilation modes that provide mandatory breaths while maintaining airway pressure, thereby ensuring reliable gas exchange regardless of spontaneous breathing status.
Data Source
Figure 1A
Figure 1B
Figure 2A~2D
AI summary
A ventilator for respiratory gas supply comprising a respiratory gas source, a control unit, a storage unit, a pressure sensor device and/or a flow sensor device, a replaceable respiratory gas hose, at least one connection port for the respiratory gas hose, a patient interface and a valve, wherein the control unit is configured to determine the respiratory phase - inspiration and expiration - of the patient from the signals of the pressure sensor device and/or the flow sensor device, to determine the patient's current tidal volume during successive inspirations and expirations, to compare at least a first, predetermined volume threshold for the tidal volume with the current tidal volume, and to determine whether the current tidal volume falls below the first volume threshold and, in response to such a fall below the threshold,to control breathing gas source 2 to set a second pressure (IPAP) for the breathing gas for inspiration and to control breathing gas source 2 to set the CPAP pressure for the breathing gas for expiration.