Table 8.
Ventilation parameters, airway parameters, and Brimacombe scores of the devices.
| Ventilation parameters | ||||||||
|---|---|---|---|---|---|---|---|---|
| Parameter | ProSeal LMA | I-gel | ||||||
| Neutral | Flexion | Extension | Lateral rotation | Neutral | Flexion | Extension | Lateral rotation | |
| Delivered tidal volumes (mL) | 461 ± 68.72 | 452 ± 100.75 | 457 ± 66.28 | 463 ± 66.26 | 481 ± 48.69 | 481 ± 52.67 | 477 ± 50.69 | 478 ± 49.63 |
| Peak airway pressures (cm H2O) | 16 ± 2.52 | 19 ± 6.09 | 15 ± 2.85 | 16 ± 2.59 | 15 ± 2.99 | 17 ± 5.25 | 15 ± 3.39 | 16 ± 3.24 |
| EtCO2 (mm Hg) | 31 ± 2.33 | 31 ± 1.98 | 31 ± 2.24 | 31 ± 2.06 | 31 ± 2.27 | 31 ± 2.02 | 31 ± 2.10 | 31 ± 2.07 |
| LAW-PAW (cm H2O) | 11 ± 5.02 | 12 ± 6.83 | 9 ± 5.18 | 12 ± 4.27 | 6 ± 4.86* | 7 ± 6.23* | 3 ± 4.46* | 6 ± 4.77* |
| Ventilation score (3/2/1/0) | 30/0/0/0 | 29/0/0/1 | 30/0/0/0 | 30/0/0/0 | 30/0/0/0 | 29/1/0/0 | 30/0/0/0 | 30/0/0/0 |
Data shown are mean ± SD or numbers. P < 0.05 is considered significant. * P value < 0.01.
(LAW-PAW, compared with similar positions between I-gel and ProSeal LMA.) LAW-PAW was consistently better for ProSeal LMA than I-gel in all positions. Other parameters including peak airway pressures, tidal volume delivery, and ventilation scores were comparable between the two groups in all positions.