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Fasciculations after succinylcholine and arterial oxygen tensions.

Wallon and colleagues investigated the accuracy of delivery of tidal volume by four anaesthesia ventilators (Aysis, FLOW-i, Primus, and Zeus) resulting from different ventilator settings, such as PEEP, tidal volume, inspiratory pause, and fresh gas ﬂ ow, in combination with different lung mechanics parameters. The experiments were performed in a laboratory environment at room temperature and in dry circuit conditions. A Fleisch pneumotachograph was used as a reference to measure the in-spired tidal volume. Gas volumes were normalized in body temperature and pressure when saturated with water vapour (BTPS) conditions for all ventilators and the reference system. Unfortu-nately, the calculations were based on incorrect premises, and the validity of the results and conclusions presented in the paper can therefore be questioned. We present the mistakes made in the original paper 2 and explain how to correct them. We also describe how this alters the conclusions of the study.