Table 2 Ventilator setting in patients depending upon urgency of surgery, ASA score, and BMI

Elective (n = 317)

500 (500–570.8)

368 (326–413)

19 (17–22)

4 (0–5)

50 (40–53)

Emergency (n = 90)

500 (462–600)

386 (330–440)

21 (17–24)

4 (2–5)

50 (45–50.7)

ASA

 1–2 (n = 288)

500 (480–550)

369 (322–419)

19 (16–23)

4 (0–5)

50 (40–55)

 3–4 (n = 99)

525 (500–600)

376 (340–376)

21 (18–24)

4 (2–5)

50 (43–55)

BMI (kg/m²)

 18.5–24.9 (n = 97)

500 (455–550)

379 (334–423)

17^b (14–20)

4 (1–5)

50 (45–53)

 25–29.9 (N = 130)

500 (489–577)

369 (321–428)

19^b (16–22)

4 (0–5)

50 (40–55)

 30–34.9 (N = 81)

500 (500–575)

360 (325–398)

21^b (18–24)

4 (0–5)

50 (40–52)

 35–39.9 (n = 28)

545 (492–600)

389 (330–432)

23^b (20–26)

4 (0–5)

50 (40–52)

> 40 (N = 28)

500 (477–550)

356 (306–414)

24^b (22–27)

5 (2–5)

48 (40–50)