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Table 2 Anaesthetic outcomes. Values are presented as frequency (%), mean (SD) and median [IQR, min - max]

From: Supreme™ laryngeal mask airway use in general Anesthesia for category 2 and 3 Cesarean delivery: a prospective cohort study

Characteristic

All Parturients n = 584

Category 2 Parturients n = 193

Category 3 Parturients n = 391

Effect measure (95% CI)

P - value

Airway insertion attempt, n(%)c

   

−0.01 (0.08, −0.09)

0.7367

1st attempt insertion success

574 (98.3)

189 (97.9)

385 (98.5)

  

2nd attempt insertion success

10 (1.7)

4 (2.1)

6 (1.5)

  

Time to effective ventilation (second), mean (SD)a

15.6 (4.4)

15.3 (4.5)

15.7 (4.4)

0.48 (−0.29, 1.25)

0.2230

Peak airway pressure (cm H2O), median [IQR, min - max]b

18 [15–21, 11–32]

17 [14–19, 11–27]

18 [16–22, 11–32]

1.00 (0.26, 1.74)

<0.0001

Seal pressure (cm H2O), median [IQR, min - max]b

27 [25–30, 17–39]

27 [24–29, 18–36]

28 [25–30, 17–39]

1.00 (0.36, 1.64)

0.0003

Seal – Peak airway pressure (cm H2O), median [IQR, min - max]b

9 [5–13, −8 - 24]

9 [6–13, −8 - 13]

9 [5–13, −3 - 24]

0.00 (−1.11, 1.11)

0.3594

Cuff volume (mL), mean (SD)a

25.0 (2.9)

25.0 (2.6)

25.0 (3.0)

0.03 (−0.44, 0.5)

0.9073

Number of attempts at orogastric tube insertion, median [IQR, min - max]b

1 [1–1, 1–1]

1 [1–1, 1–1]

1 [1–1, 1–1]

1.0000

Volume of gastric aspirate (mL), mean (SD)a

14.2 (14.3)

12.1 (7.4)

15.2 (16.6)

3.16 (1.21, 5.11)

0.0016

pH of gastric aspirate, mean (SD)a

2.3 (0.8)

2.4 (0.9)

2.3 (0.8)

−0.08 (−0.24, 0.07)

0.2845

Respiratory rate (breaths /minute), median [IQR, min - max]b

12 [12–12, 10–17]

12 [12–12, 10–15]

12 [12–12, 10–17]

0.5250

Tidal volume (mL), median [IQR, min - max]b

480 [450–500, 360–650]

470 [450–500, 360–600]

480 [450–500, 380–650]

10.00 (−2.48, 22.48)

0.0002

pH on laryngeal surface, mean (SD)a

7.0 (0.5)

7.0 (0.6)

7.1 (0.4)

0.04 (−0.05, 0.13)

0.3985

  1. Note: Effect measure is expressed as amean difference with 95% CI, bdifference in median with 95% CI or crisk difference with 95% CI