Article Figures & Data
Figures
- Figure 1
- Consolidated standards of reporting trials flow diagram of the study.
Tables
- Table 1
- Comparison of patients’ demographic data, Mallampati scores, intubation, surgery, and anesthesia times.
Characteristics Group 1 n (33) Group 2 n (33) P-value Mean±SD Median (min–max) Mea±SD Median (min–max) Age (year) 31.00±6.16 32 (19-41) 30.52±5.57 31 (19-40) 0.739** Weight (kg) 80.42±16.98 81 (51-110) 79.67±12.92 78 (58-105) 0.839** Length (m) 1.64±0.06 1.65 (1.51-1.75) 1.64±0.06 1.63 (1.52-1.75) 0.938* BMI (kg/m2) 29.77±5.48 29.76 (21.39-38.06) 29.49±3.91 30 (21.26-35.86) 0.812** Mallampati score (I/II/III) 9/16/8 13/12/8 0.306* Intubation time (second) 13.21±4.47 12 (6-22) 13.79±5.69 12 (6-30) 0.974* Operation time (minute) 49.58±9.63 50 (30-75) 52.48±9.42 50 (40-75) 0.250* Anesthesia time (minute) 58.42±10.61 57 (35-90) 63.27±12.50 60 (45-90) 0.113* *Mann-Whitney U test, **Independent-samples t-tests, SD: standard deviation, Min: minimum, Max: maximum, Group 1: 3 minutes at normal tidal volume, Group 2: 30 seconds with the 4 deep vital capacity technique, BMI: body mass index
Time Group 1 n (33) Group 2 n (33) P-value* Mean±SD Median (min–max) Mean±SD Median (min–max) T1 91.97±3.5 92 (81–97)c 93.85±4.67 95 (82–99)b 0.012 T2 90.33±5.42 92 (74–97)c 90.24±5.41 91 (78–98)b 0.908 T3 58.94±5.52 60 (49–69)b 57.15±4.36 58 (49–64)a 0.081 T4 55.39±4.77 58 (46–60)a 55.18±4.18 57 (46–60)a 0.287 P-value† <0.001 <0.001 Group 1: 3 min at normal tidal volume, Group 2: 30 s with the 4 deep vital capacity technique. SD: standard deviation, Min: minimum, Max: maximum, T1: after preoxygenation, T2: immediately after intubation, T3: at the 3rd min after intubation, T4: at the 7th min after intubation, *P-value: Comparison between groups. †P-value: Compared within the group, a-c: There is no difference between times with the same letter in a group.
Time Group 1 n (33) Group 2 n (33) P-value* Mean±SD Median (min.–max.) Mean±SD Median (min.–max.) T1 81.64 ± 7.07 83 (62–91)c 84.27 ± 9.89 88 (56–95)b 0.025 T2 76.27 ± 6.54 77 (66–89)c 80.85 ± 8.34 82 (62–98)b 0.009 T3 53.70 ± 6.07 54 (42–65)b 51.58 ± 3.86 51 (45–60)a 0.086 T4 49.21 ± 4.24 50 (41–54)a 49.30 ± 3.95 50 (41–54)a 0.732 P-value† <0.001 <0.001 * Mann-Whitney U test; †Friedman test, SD: standard deviation; Min: minimum; Max: maximum, Ggoup 1: 3 min at normal tidal volume, Group 2: 30 s with the 4 deep vital capacity technique, T1: after preoxygenation, T2: immediately after intubation, T3: at the 3rd min after intubation, T4: at the 7th min after intubation, *P-value: Comparison between groups. †P-value: Compared within the group, a-c. There is no difference between times with the same letter in a group.
Time Group 1 (n: 33) Group 2 (n: 33) P-value* Mean±SD Median (min.–max.) Mean±SD Median (min.–max.) T1 0.52±0.23 0.58 (0.09–1)b 0.47±0.33 0.42 (0–1)b 0.342 T2 0.27±0.20 0.29 (0–0.71)a 0.39±0.31 0.33 (0–1)ab 0.173 T3 0.20±0.22 0.12 (0–0.62)a 0.24±0.22 0.25 (0–0.67)a 0.427 T4 0.15±0.17 0.17 (0–0.48)a 0.23±0.24 0.20 (0–0.9)a 0.226 P-value† <0.001 <0.001 * Mann-Whitney U test, †Friedman test, SD: standard deviation, Min: minimum, Max: maximum, Group 1: 3 min at normal tidal volume, Group 2: 30 s with the 4 deep vital capacity technique, T1: after preoxygenation, T2: immediately after intubation, T3: at the 3rd min after intubation, T4: at the 7th min after intubation, *P-value:comparison between groups. †P-value: Compared within the group, a-b: There is no difference between times with the same letter in a group.
Time ORİ Coefficient FeO2 FiO2 T1 ORİ r 0.031 0.113 p 0.805 0.366 T2 ORİ r 0.189 0.155 p 0.129 0.214 T3 ORİ r 0.246 0.270 p 0.047 0.028 T4 ORİ r 0.390 0.372 p 0.001 0.002 r: Spearman’s Rho correlation coefficient, T1: after preoxygenation, T2: immediately after intubation, T3: at the 3rd min after intubation, T4: at the 7th min after intubation, ORI: oxygen reserve index, FeO2: fraction of exhaled O2, FiO2: Fraction of inspired O2
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