Anaes SAQs · Breathing systems & circuits
The circle system and the low-flow anaesthesia
The circle + low-flow SAQ — the unidirectional valves, the soda lime (Ca(OH)2 + CO2 → CaCO3 + H2O + heat), the APL valve, the reservoir bag; the low-flow technique (start high, reduce, increase the vaporiser setting, monitor the inspired agent and O2).
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Target exams
ANZCAFRCAABAEDAIC
Prompt
Describe the components of the circle breathing system, the principle of the CO2 absorption, and the conduct of the low-flow anaesthesia (a fresh gas flow below 1 L/min).
Question
Describe the components of the circle breathing system, the principle of the CO2 absorption, and the conduct of the low-flow anaesthesia (a fresh gas flow below 1 L/min, as defined in the stem).
References2ShowHide
- [1]Feldman JM, et al. Carbon Dioxide Absorption During Inhalation Anesthesia: A Modern Practice. Anesth Analg, 2021.PMID 32947290
- [2]Parthasarathy S, et al. The closed circuit and the low flow systems. Indian J Anaesth, 2013.PMID 24249885