Anaes Vivas · The anaesthetic machine
Data viva — a rising inspired CO2 on the capnograph
A data viva on the rising inspired CO2 — the differential (the exhausted soda lime, the stuck valve, the insufficient fresh gas flow), the diagnostic manoeuvre (the increased flow, the valve inspection), and the management.
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Prompt
A capnography trace showing a rising inspired CO2 baseline (the rebreathing) with a normal expiratory plateau. The soda lime indicator is fresh.
Stimulus
A capnography trace showing a rising inspired CO2 baseline (the rebreathing). The expiratory plateau is normal in shape but the whole trace is shifted upward. The soda lime indicator still shows fresh. The fresh gas flow is 500 mL/min. Discuss the differential and the management.
References1ShowHide
- [2]Parthasarathy S, et al. The closed circuit and the low flow systems. Indian J Anaesth, 2013.PMID 24249885