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![]() ![]() 5Division of Anaesthesiology, Vetsuisse Faculty, Zurich, Switzerland.4Department of Anesthesiology, Hospital Privado de Comunidad, Mar del Plata, Argentina.3Anaesthesiology and Perioperative Intensive Care Medicine, Veterinary University Vienna, Vienna, Austria.2Department of Anesthesiology and Intensive Care Medicine, Rostock University Medical Center, Rostock, Germany.1College of Veterinary Medicine, Murdoch University, Perth, WA, Australia.Böhm 2 Anthea Rasis 1 Giselle Hoosgood 1 Ulrike Auer 3 Gerardo Tusman 4 Regula Bettschart-Wolfensberger 5 Johannes P. PaCO2 and PetCO2 increased accordingly (see Figure 3 above).Stephan H. Although the increase in respiratory rate was sufficient to keep V’E constant (7 l/min), V’alv fell by almost 30% (4.7 l/min to 3.4 l/min) due to an identical increase in dead space ventilation. After ten minutes, arterial blood gas measurements showed a pH of 7.17, PaCO2 of 70 mmHg, and PaO2 of 68 mmHg. ![]() The patient’s calculated ideal body weight was 70 kg, Ppeak was 40 cmH2O, V’E was 7 l/min, and V’alv was 4.7 l/min as shown in Figures 1 and 2 below.īased on a goal of 6 ml/kg ideal body weight, the VT was reduced to 350 ml, and the set respiratory rate was increased from 14 b/min to 20 b/min to maintain the same V’E (7 l/min).The decrease in tidal volume was accompanied by a drop in peak pressure to 28 cmH2O and plateau pressure to 24 cmH2O. Arterial blood gas measurements obtained shortly after arrival were: pH 7.36, PaCO2 40 mmHg, and PaO2 65 mmHg. ![]() This patient, for example, was receiving volume-controlled breaths with a set VT of 500 ml at a rate of 14 b/min, an inspired fractional oxygen concentration of 0.60, and positive end expiratory pressure (PEEP) of 8 cmH2O. ![]() Determine the value of V’alv that helped to maintain or reach the desired level of PaCO2. ![]()
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