The study compared three modes of mask ventilation – manual ventilation (MV), pressure-controlled ventilation (PCV) and volume-controlled ventilation (VCV) – in 152 patients undergoing laparoscopic surgery, with airway pressure limited to 15 cmH₂O and a tidal volume of 6–8 ml/kg. Intra-abdominal pressure (IAP) was measured intravesically and did not decrease significantly in any group after induction of anesthesia. In the VCV group, patients with gastric insufflation had higher IAP than those without it (p=0.031), as well as higher maximum airway pressure in subgroups GI+ in MV (p=0.009) and VCV (p<0.001). The PCV group showed greater delivered tidal volume and lower PaCO₂ (p<0.001). The incidence of postoperative nausea and vomiting (PONV) did not differ between the three regimens, but was higher in the gastric insufflation subgroup (25.8% vs. 11.5%, p=0.012). All regimens reduced IAP comparably, with no differences in gastric insufflation.