Electronic Vaporizer Closed-Loop Anesthesia Control
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Solution Overview
Problem
Manual vaporizer systems for anesthesia delivery are prone to human error and require significant clinician attention, leading to suboptimal anesthesia levels in patients, and many facilities cannot afford to replace existing systems with closed-loop control systems.
Innovation Solution
An electronic vaporizer system that measures end tidal concentration of anesthetic agents and automatically adjusts delivery to maintain a desired concentration, compatible with existing ventilator systems and capable of integration with depth of anesthesia monitors for precise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual vaporizer systems are used for anesthesia delivery, then device complexity is reduced and ease of operation is improved, but reliability deteriorates due to human error and suboptimal anesthesia levels
Solution Approach 1:
The patent implements a closed-loop control system that continuously measures end-tidal anesthetic concentration and uses this feedback to automatically adjust vaporizer delivery, eliminating human error while maintaining system compatibility through retrofittable sensors and controllers
Solution Approach 2:
The system performs self-regulation by automatically controlling anesthetic vapor delivery based on real-time patient response measurements, freeing clinicians from manual adjustment tasks while ensuring consistent target concentration maintenance
2Reliability
If closed-loop control systems are deployed to eliminate human error, then reliability is improved, but device complexity increases and ease of operation deteriorates
Solution Approach 1:
The closed-loop system autonomously monitors patient response and self-adjusts vaporizer settings without requiring clinician intervention, transforming a complex control task into a simple retrofittable addition to existing vaporizer infrastructure
3Manufacturing precision
If automated control is implemented to maintain desired end tidal concentration, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
Real-time measurement of end-tidal anesthetic concentration provides continuous feedback to the controller, which automatically adjusts vaporizer delivery to maintain precise target concentrations, achieving manufacturing-level precision through retrofittable sensor integration
Solution Approach 2:
Manual mechanical adjustment of vaporizer settings is replaced with electronic control systems that use sensors and algorithms to achieve precise concentration control, substituting mechanical precision with electronic measurement and control
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
The electronic vaporizer system provides safe and precise control of anesthesia delivery, reducing human error and allowing clinicians to focus on other aspects of patient care, while being retrofittable to existing systems.
Implementation Method 1
a gas sensor configured to measure end tidal concentration of the anesthetic agent and exhalation gasses from the patient
Implementation Method 2
a vaporizer unit that vaporizes the anesthetic agent from the sump and delivers the vaporized agent to a patient breathing circuit
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
An electronic vaporizer system includes an anesthetic sump containing anesthetic agent, a vaporizer unit that vaporizes the anesthetic agent from the sump and delivers the vaporized agent to a patient breathing circuit, and a gas sensor configured to measure end tidal concentration of the anesthetic agent and exhalation gasses from the patient. A control system is configured to receive the measured end tidal concentration of anesthetic agent and compare the measured end tidal concentration to a desired end tidal concentration to be maintained for the patient. The vaporizer unit is then automatically controlled to deliver an amount of vaporized agent to the patient based on the comparison.