Maintenance of anaesthesia corresponds to the period in which surgical procedures are being carried out or the patient is being ventilated. Anaesthesia can be maintained with:
To these basic formats, other agents are added according to circumstances, e.g. regional analgesia or muscle relaxants where artificial ventilation is required.
There are no set levels for the concentration of anaesthetic agent - they should be titrated according to the physiological characteristics of the patient and the type of operation.
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