Results of EIT and arterial blood gas measurements (mean ± SD) in 6 horses for the first 6 hours (t1-t6) after recovery from anaesthesia.

ROI = Region of interest 1–4; tfillr = Filling time for each region (1dors, 2dors, 3dors, 4mid, 5vent, 6vent, 7vent); tinflr = Inflation period for each region (1dors-7vent); RR = Respiratory rate; VTEIT = Tidal volume as calculated from the EIT signal; PaCO2 = Arterial partial pressure of carbon dioxide; PaO2 = Arterial partial pressure of oxygen. Values are percentages unless otherwise stated.