Table 1 Baseline characteristics of patients and surgery

Age (yr)

46.2 (40.0–57.0)

Female, n(%)

87.0 (71.3)

BMI (kg/m²)

23.0 (20.4–26.0)

WC (cm)

81.1 (72.0–87.0)

NC (cm)

34.8 (32.7–37.5)

HC (cm)

94.7 (88.0-100.4)

Operation Duration (min)

151.5 ± 61.1

Anesthesia Duration (min)

206.6 ± 72.0

Pneumoperitoneum Duration (min)

88.2 ± 38.8

ASA, n(%)

I

12 (9.8)

II

103 (84.4)

III

7 (5.7)

Tube size (mm), n(%)

7

87 (71.3)

7.5

34 (27.9)

8

1 (0.8)

Mallampati classification, n(%)

I

37(30.3)

II

85(69.7)

Tracheal tube cuff pressure at T₀ (cmH₂O)

41.0 (29.0−53.3)

Peritoneal insufflation pressure (mmHg)

T₁

12.5 ± 1.2

T₂

12.4 ± 1.1

T₃

12.4 ± 1.3