Harmonic Positive-Negative Ventilation for Precise Tidal Volume
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Solution Overview
Problem
Traditional high-frequency ventilation systems are large in size, complex in structure, and suffer from carbon dioxide accumulation and low tidal volume control accuracy.
Innovation Solution
A high-frequency respiratory control system with harmonic-controlled positive and negative pressure ventilation, utilizing a high-pressure gas source for positive pressure output and a vacuum source for negative pressure input, with coordinated control of inspiratory and expiratory tube sections to achieve high-frequency ventilation, incorporating safety valves, proportional valves, and flowmeters for precise tidal volume control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional high-frequency ventilation systems are used, then ventilation function is provided, but the system becomes large in size and complex in structure
Solution Approach 1:
The system divides the ventilation process into distinct inspiratory and expiratory phases using separate tube sections (inspiratory tube section and expiratory tube section) that are alternately opened and closed. This segmentation allows each phase to be optimized independently, simplifying the overall structure while maintaining reliable ventilation function.
Solution Approach 2:
The system employs periodic alternation between opening and closing the inspiratory and expiratory tube sections to achieve high-frequency ventilation. The control module periodically switches the tube sections on and off, creating rhythmic positive and negative pressure cycles that simplify the mechanical structure while ensuring continuous effective ventilation.
2Productivity
If traditional high-frequency ventilation systems are used, then ventilation is provided, but carbon dioxide accumulates at the gas supply end
Solution Approach 1:
The system creates periodic negative pressure phases by closing the inspiratory tube section and opening the expiratory tube section, generating vacuum effect that actively removes carbon dioxide from the gas supply end. This periodic creation of negative pressure prevents carbon dioxide accumulation while maintaining high ventilation efficiency.
Solution Approach 2:
The control module monitors the ventilation process and adjusts the timing and duration of tube section opening and closing based on real-time conditions. This feedback mechanism ensures that carbon dioxide removal is optimized while preventing its accumulation, balancing ventilation efficiency with gas composition control.
3Speed
If traditional high-frequency ventilation systems are used, then high-frequency gas flow is generated, but tidal volume control accuracy is low
Solution Approach 1:
The control module incorporates flowmeters and pressure meters to continuously monitor gas flow and pressure during ventilation. Based on this real-time feedback, the system dynamically adjusts the opening and closing timing of tube sections and the duration of positive and negative pressure phases, achieving precise control of tidal volume while maintaining high ventilation frequency.
Solution Approach 2:
The system replaces purely mechanical flow control with a control system that uses sensors (flowmeters, pressure meters) and electronic control to regulate tube section opening and closing. This substitution enables more precise measurement and control of tidal volume while maintaining high-frequency operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This system effectively removes carbon dioxide during expiration, simplifies the structure, reduces the ventilator's size, and enhances tidal volume control accuracy, ensuring stable ventilation without carbon dioxide retention.
Implementation Method 1
the outlet B of the expiratory tube section is connected to a vacuum source
Implementation Method 2
the inlet A of the inspiratory tube section is connected to a gas source
Data Source
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AI summary
This invention relates to the field of ventilator technology, specifically disclosing a high-frequency respiratory control system, method, and ventilator with harmonic-controlled positive and negative pressure ventilation, including: an inspiratory tube section and an expiratory tube section, where the inlet A of the inspiratory tube section is connected to a gas source, the outlet B of the expiratory tube section is connected to a vacuum source, and the outlet C of the inspiratory tube section and the inlet D of the expiratory tube section are both connected to the gas supply end through a third flowmeter and a pressure meter; a control module, used to control the alternate opening and closing of the inspiratory and expiratory tube sections, providing high-frequency gas supply to the patient. This invention uses a vacuum source as negative pressure input, which can effectively control the expiratory volume during the expiration phase, effectively removing carbon dioxide and preventing carbon dioxide retention; it can simplify the structure, reduce the size of the ventilator, and simplify the ventilation control logic by controlling the alternate opening and closing of the inspiratory and expiratory tube sections. This invention can accurately control the tidal volume during ventilation without other interfering factors.