Comparative study between volume-controlled ventilation and pressure-controlled ventilation in prevention of postoperative pulmonary atelectasis in morbidly obese patients undergoing laparoscopic gastric sleeve surgery

Ain-Shams Journal of Anesthesiology

Table 2 PaO₂ (mmHg)

PaO₂	Group (V), VCV (n = 26)	Group (P), PCV (n = 26)	t test	p value
Preoperative	86.53 ± 10.21	86.86 ± 8.41	1.316	0.134
Intraoperative	212.75 ± 20.13	225.85 ± 18.69	4.638	0.011*
30 min after extubation	82.52 ± 8.16	86.60 ± 14.42	0.823	0.346
12 h after extubation	86.55 ± 7.82	83.06 ± 14.24	1.108	0.272
24 h after extubation	87.76 ± 9.12	82.83 ± 13.93	1.176	0.166

This table shows statistically significant increase in intraoperative arterial oxygen tension (PaO₂) in the PCV group compared to the VCV group
t independent sample t test, PCV pressure-controlled ventilation, VCV volume-controlled ventilation
p value > 0.05 NS, *p value < 0.05 S