Lung ultrasound score evaluation of the effect of pressure-controlled ventilation volume-guaranteed on patients undergoing laparoscopic-assisted radical gastrectomy

Table 1 Comparison of general patient characteristics

Indicators	Control group (n = 51)	Research group (n = 52)	χ2/t	P value
Sex (male/female)	25/26	24/28	0.085	0.771
Age (years)	58.78 ± 8.01	61.13 ± 7.40	1.547	0.125
Body mass index (kg/m2)	21.49 ± 2.40	22.12 ± 3.01	1.173	0.244
Duration of pneumoperitoneum (minutes)	66.25 ± 12.89	64.63 ± 13.6	0.620	0.537
ASA grade (II/III)	28/23	25/27	0.480	0.488

ASA: America Society of Anesthesiologists.

Table 2 Comparison of postoperative pulmonary complications, n (%)

Indicators	Control group (n = 51)	Research group (n = 52)	χ2	P value
Pneumonia	3 (5.88)	0 (0.00)
Hypoxemia	7 (13.73)	4 (7.69)
Bronchospasm	2 (3.92)	2 (3.85)
Atelectasis	5 (9.80)	3 (5.77)
Pneumothorax	2 (3.92)	1 (1.92)
Total	19 (37.25)	10 (19.23)	4.135	0.042