Table 2. Tracheal Intubation and Extubation.
| Variable | No. (%) | P Value | |
|---|---|---|---|
| Sellick Group (n = 1735) | Sham Group (n = 1736) | ||
| Tracheal intubation | |||
| Intubation time, median (IQR), s | 27 (19-40) | 23 (15-37) | <.001 |
| Intubation time >30 s | 792 (47) | 677 (40) | <.001 |
| Missing values, No. | 42 | 49 | NA |
| Operator | .33 | ||
| Senior anesthesiologist | 184 (11) | 162 (9) | |
| Junior anesthesiologist | 439 (25) | 465 (27) | |
| Senior nurse anesthetist | 990 (57) | 970 (56) | |
| Junior nurse anesthetists | 109 (6) | 125 (7) | |
| Missing values, No. | 13 | 14 | NA |
| Use of a bougie | 536 (21) | 546 (21) | .63 |
| Missing values, No. | 1 | 0 | NA |
| No. of attempts | |||
| 1 | 1585 (92) | 1589 (92) | .19 |
| 2 | 119 (7) | 126 (7) | |
| >2 | 28 (2) | 18 (1) | |
| Missing values, No. | 3 | 3 | NA |
| More than 1 operator | 70 (4) | 82 (5) | .32 |
| Missing values, No. | 5 | 4 | NA |
| Cormack and Lehane grade | |||
| 1 | 1285 (74) | 1381 (80) | <.001 |
| 2 | 270 (16) | 256 (15) | |
| 3 | 133 (8) | 76 (4) | |
| 4 | 42 (2) | 17 (1) | |
| Missing values, No. | 5 | 6 | NA |
| Interruption of the cricoid pressure | 246 (14) | 86 (5) | <.001 |
| Missing values, No. | 5 | 5 | NA |
| Improvement in Cormack and Lehane Grade after cricoid pressure interruption | 152 (62) | 28 (33) | <.001 |
| Missing values, No. | 1 | 1 | .55 |
| Vomiting | 6 (0.3) | 4 (0.2) | |
| Missing values, No. | 1 | 0 | |
| Difficult tracheal intubation | 72 (4) | 51 (3) | |
| More than 2 attempts | 51 | 39 | .05 |
| Other technique used | 31 | 21 | |
| Missing values, No. | 1 | 0 | |
| Impossible tracheal intubation | 0 | 1 | NA |
| Missing values, No. | 1 | 0 | >.99 |
| Mask ventilation required | 23 (1) | 20 (1) | NA |
| Missing values, No. | 2 | 0 | .64 |
| Oxygen desaturation (<92%) | 67 (4) | 66 (4) | NA |
| Missing values, No. | 4 | 0 | .92 |
| Tracheal extubation | |||
| Postoperative extubation | 1676 (97) | 1687 (97) | .42 |
| Missing values, No. | 3 | 1 | NA |
| Patients with NDMR and extubated | 930 (54) | 962 (55) | .29 |
| Missing values, No. | 1 | 0 | NA |
| Train-of-4 measurementa | 817 (88) | 835 (87) | .45 |
| Train-of 4, median (IQR), %a | 97 (91-100) | 97 (91-100) | .86 |
| Missing values, No. | 3 | 2 | NA |
| Reversal agent administereda | 515 (56) | 464 (56) | .78 |
| Missing values, No. | 3 | 1 | NA |
| Swallowing reflex present | 1659 (99) | 1667 (99) | .84 |
| Missing values, No. | 62 | 56 | NA |
| Postoperative dyspnea | 9 (0.5) | 11 (0.6) | .66 |
| Missing values, No. | 51 | 47 | NA |
| Postoperative oxygen desaturation (<92%) | 60 (4) | 62 (4) | .88 |
| Missing values, No. | 68 | 51 | NA |
| Postoperative NIV | 2 (0.1) | 5 (0.3) | .45 |
| Missing values, No. | 51 | 45 | NA |
| Postoperative tracheal reintubation | 2 (0.1) | 2 (0.1) | >.99 |
| Missing values, No. | 50 | 45 | NA |
| Traumatic complication | 17 (1) | 9 (0.5) | .11 |
| Missing values, No. | 3 | 0 | NA |
Abbreviations: IQR, interquartile range; NA, not applicable; NDMR, nondepolarizing muscular relaxant; NIV, noninvasive ventilation.
a
Results are provided for patients with NMDR and extubated.