Anesthesia Ventilator Switching Valve Manual Mode
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Solution Overview
Problem
There is a need for a ventilator optimized for intravenous anesthesia that utilizes an open breathing system, capable of both automatic and manual ventilation, as existing ventilators are often dependent on electrical power and lack manual ventilation functionality suitable for intensive care environments.
Innovation Solution
The ventilation system incorporates a switching valve to direct gas flow between automatic and manual ventilation modes, using a pressure sensor to monitor and control the manual ventilation bag's pressure, ensuring proper PEEP pressure maintenance and gas flow management between inhalation and exhalation phases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If a re-breathing circuit with bag-in-bottle ventilator is used for volatile anesthetic agents, then anesthetic gas preservation is improved, but device complexity increases and manual ventilation capability is lost
Solution Approach 1:
The patent removes the bag-in-bottle construction and carbon dioxide absorber from the ventilator system when using intravenous anesthesia. This extraction eliminates the complex isolation mechanisms needed for volatile anesthetic agents, simplifying the device while maintaining anesthetic gas preservation through the alternative intravenous delivery method
Solution Approach 2:
The ventilator is designed to be universally applicable to both volatile anesthetic agents and intravenous anesthesia by incorporating a switching mechanism. The same basic ventilator structure can serve different anesthetic delivery systems, with the bag-in-bottle unit and CO2 absorber being optional components that can be included or excluded based on the anesthetic method used
2Adaptability or versatility
If a dedicated manual bag fill valve is included for power-free operation, then manual ventilation capability is improved, but device complexity increases
Solution Approach 1:
The patent combines the manual bag filling function with the existing automated ventilation system by using the same valve and pressure sensor for both modes. The switching valve integrates the manual and automated pathways, eliminating the need for a separate dedicated manual bag fill valve while maintaining power-free manual ventilation capability
Solution Approach 2:
The switching valve serves dual purposes: it directs gas flow for automated ventilation and enables manual bag filling when activated. This multi-functional component replaces what would otherwise require separate dedicated valves, reducing overall device complexity while maintaining both ventilation modes
3Device complexity
If an open breathing circuit is used for intravenous anesthesia, then device complexity is reduced, but manual ventilation capability is lost
Solution Approach 1:
The patent introduces a dynamic switching mechanism that allows the open breathing circuit to transition between automated and manual ventilation modes. The switching valve dynamically redirects gas flow based on the selected mode, enabling the simplified open circuit to maintain manual ventilation capability when needed
Solution Approach 2:
The manual ventilation bag serves as an intermediary component that bridges the open breathing circuit and manual ventilation requirements. When the switching valve directs flow to the bag, it temporarily stores gas that can then be manually delivered to the patient, enabling manual ventilation without requiring a complex dedicated manual ventilation system
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 solution enables effective manual ventilation during intravenous anesthesia, eliminating the need for a manual bag filling valve and optimizing the ventilator for open-circuit systems, reducing equipment complexity and enhancing operational flexibility.
Implementation Method 1
a pressure sensor to monitor and control the manual bag's pressure
Data Source
AI summary
A ventilation system for intensified breathing that includes both a manual ventilation system and automatic ventilation system. The gas mixture from a gas supply system is supplied to a switching valve that is operable between a manual position and an automatic position. When the switching valve is in the manual position, the inhalation gas from the supply system is guided to a manual ventilation bag. When the ventilation bag is squeezed during manual inhalation, the gas flow from the manual bag is directed to the inhalation limb of the patient circuit. When the manual ventilation bag is released, the pressure within the ventilation bag falls below the exhalation pressure, thereby indicating the beginning of the exhalation phase and the re-inflation of the manual ventilation.