Anesthesia Breathing Circuit Pre-Conditioning Process
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Solution Overview
Problem
Current anesthesia apparatuses with breathing circuits face challenges in rapidly initiating inhalation anesthesia while ensuring patient monitoring and avoiding disconnection during the process, especially in half-closed rebreathing systems where gas concentration and pressure monitoring are inadequate.
Innovation Solution
A process where a gas mixture is circulated in the breathing circuit until a preset anesthetic concentration is reached, then switched to allow patient connection, using infrared optical measurement for concentration detection and adjustable components like radial flow compressors and valves to control gas delivery and patient connection states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If high fresh gas flow is used for a long time to exchange gases in the breathing system, then the desired anesthetic concentration is achieved, but the initiation time becomes excessively long
Solution Approach 1:
The patent applies preliminary action by pre-conditioning the breathing circuit with the anesthetic gas mixture before patient connection. The system circulates and conditions the gas mixture in the breathing circuit to achieve the desired anesthetic concentration in advance, then quickly connects the patient to receive the pre-prepared anesthetic atmosphere, eliminating the need for prolonged high-flow gas delivery after connection.
2Speed
If direct feed of fresh gas with volatile anesthetic is used in a half-open system, then rapid initiation of anesthesia is achieved, but monitoring of pressure and gas concentration cannot be ensured
Solution Approach 1:
The patent introduces an intermediary closed breathing circuit system between the fresh gas source and the patient. This closed circuit acts as a mediator that allows precise control and monitoring of gas concentration and pressure through sensors and flow meters, while still enabling rapid anesthetic delivery by pre-conditioning the circuit before patient connection.
3Speed
If a separate fresh gas outlet is used in a half-open system, then rapid anesthesia initiation is guaranteed, but the patient must be disconnected and reconnected after initiation
Solution Approach 1:
The patent merges the fresh gas delivery system with the patient breathing circuit by using a closed circuit system where the fresh gas outlet integrates with the breathing circuit. This allows the patient to remain continuously connected while receiving the pre-conditioned anesthetic gas mixture, eliminating the need for disconnection and reconnection procedures.
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 rapid and safe anesthesia initiation without patient disconnection, ensuring continuous monitoring and optimal gas supply by maintaining preset concentrations throughout the process.
Implementation Method 1
The anesthetic concentration set in the first operating state in the breathing circuit may be detected by means of an infrared optical measurement
Data Source
AI summary
An anesthesia apparatus with a breathing circuit (1) has improved initiation of anesthesia for the patient. The gas mixture dispensed into the breathing circuit (1) is circulated in a first operating state without release to a patient until a preset anesthetic concentration is set in the breathing circuit (1). The respiration of the patient connected to the anesthesia apparatus takes place in a subsequent second operating state with the gas mixture set in the first operating state.