Automated Anesthesia Apparatus Flushing Control
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Solution Overview
Problem
Conventional anesthesia apparatuses require manual intervention and are inefficient in flushing out anaesthetic agents from reflector filters and CO2 absorbers between patients, leading to potential contamination and costly filter replacements.
Innovation Solution
An automated anesthesia apparatus with a control unit and gas analyzer that controls gas flow to flush anaesthetic agents through the system, including a PEEP valve and evacuation line, allowing for automated pre-use checks and filter reuse assessment without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If manual flushing procedure is used between patients, then operator control over flushing process is maintained, but manual intervention is required and flushing efficiency is reduced
Solution Approach 1:
The system performs self-flushing automatically without requiring operator intervention. The control unit activates the evaporator and directs gas flow through the reflector filter and breathing circuit to flush anaesthetic agents between patients, making the system self-sufficient and eliminating manual flushing requirements.
Solution Approach 2:
The system performs preliminary flushing actions automatically before the next patient arrives. The control unit initiates the flushing sequence proactively, activating the evaporator and directing gas flow through the entire breathing circuit to ensure anaesthetic agents are removed before the next anaesthesia session begins.
2Loss of substance
If reflector filter is used to recycle anaesthetic, then anaesthetic efficiency is improved, but anaesthetic accumulation in filter requires complete filter replacement
Solution Approach 1:
The system recovers anaesthetic agents from the reflector filter through automated flushing and redirects them through the breathing circuit for potential reuse. Instead of discarding the filter completely, the system recovers the valuable anaesthetic agents trapped in the filter medium and makes them available for the next patient session.
Solution Approach 2:
The system replaces the mechanical filter replacement process with an automated chemical flushing process. Instead of mechanically removing and replacing the filter, the control unit activates the evaporator to generate vapor that chemically interacts with and removes anaesthetic agents from the filter through the breathing circuit.
3Productivity
If automated flushing control is implemented, then flushing efficiency is improved, but system complexity increases
Solution Approach 1:
The control unit performs multiple functions: it controls the evaporator activation, directs gas flow through the reflector filter, manages the breathing circuit, and monitors flushing progress. By making the control unit multi-functional, the system achieves automated efficient flushing without adding separate dedicated components for each function.
Solution Approach 2:
The system merges the flushing function with the existing evaporator and breathing circuit components. The control unit integrates the flushing sequence with the normal anaesthesia delivery system, combining multiple functions (anaesthetic delivery, filter operation, and flushing) into a unified controlled process rather than adding separate independent systems.
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
Enables efficient and automated flushing of anaesthetic agents from the anesthesia apparatus between patients, reducing manual labor and minimizing the need for filter replacements, while ensuring safety for subsequent patients by monitoring anaesthetic concentrations.
Implementation Method 1
The filter adsorbs anaesthetic that is not consumed by the patient and during inhalation re-leases it again so that it is provided to the patient instead of being expired together with the expiration gas
Implementation Method 2
a vaporizer for providing anaesthetic to the inspiration line
Implementation Method 3
a gas analyzer to detect anaesthetic concentration in a gas flow from the inspiration line
Data Source
AI summary
An anaesthesia apparatus has a control unit that controls a gas flow of a flushing gas through at least part of the anaesthesia apparatus so as to flush anaesthetic agent from the apparatus when the apparatus is not connected to a patient. In this way the remaining anaesthetic agent can be removed from the anaesthesia apparatus after use before connecting another patient. Pre-use check of the apparatus can be performed automatically.