Shunt vs dead space open anesthesia9/21/2023 ![]() The difference in PIP between VCV and PCV-VG was assessed as the primary outcome. Data including other respiratory variables, hemodynamic variables, and arterial blood gases were also collected. ![]() PIP, dynamic compliance (Cdyn) and mean inspiratory pressure (Pmean) were recorded at 5 min after induction of anesthesia (T1), 5 min after pneumoperitoneum(T2), 30 and 60 min after pneumoperitoneum (T3 and T4). The participants were randomly assigned to receive VCV or PCV-VG. MethodsĮighty participants scheduled for laparoscopic surgery were enrolled in this prospective, randomized clinical trial. In this study, we compared respiratory mechanics and circulatory parameters between volume-controlled ventilation (VCV) and PCV-VG in elderly patients undergoing laparoscopic surgery using the laryngeal mask airway supreme (LMA). Pressure-controlled ventilation volume-guaranteed (PCV-VG), delivering a preset tidal volume with the lowest required airway pressure, is being increasingly used during general anesthesia. The peak inspiratory pressure (PIP) is crucial in mechanical ventilation with supraglottic airway device (SAD).
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