Table 3. Slow wave activity saturation on emergence from anesthesia.
Slow wave activity saturation (SWAS) fitting outcome is sub-categorized as graded or abrupt based on the slow wave emergence trajectory gradient. SWAS parameters represent the mean ±SD across participants. The table describes the hypnotic agent, whether any co-induction agents were present and the surgery details. Abbreviations: N/A, not applicable; Gyn, gynaecological; Gen, general surgical; Orth, orthopaedic, Vasc, vascular; Urol, urological.
| Emergence | STUDY 1 | STUDY 3 | STUDY 4 |
|---|---|---|---|
| Anesthetic agent | Propofol | Desflurane | Mixed |
| Co-induction agents | No | Yes | Yes |
| Type of surgery | N/A | Gyn: 54; Gen: 37; Orth: 11 |
Gyn: 129; Gen: 121; Orth: 4;Vasc: 66; Urol: 30; Other: 4 |
| Severity grading of surgery | N/A | 1: 0; 2: 51; 3: 51; 4: 0 | 1: 51; 2: 102; 3: 83; 4: 18 |
| No of datasets | 16 | 102 | 254 |
| Successful fits | 15 (94%) | 71 (71%) | 175 (69%) |
| 1: Graded response | 14 (88%) | 50 (49%) | 110 (43%) |
| 2: Abrupt response | 1 (6%) | 21 (20%) | 65 (26%) |
| Failed fits | 1 (6%) | 31 (31%) | 79 (30%) |
| 1: No plateau | 1 (6%) | 16 (16%) | 42 (16%) |
| 2: Flat response & EMG | 0 (0%) | 15 (15%) | 37 (14%) |
| SWAS parameters | |||
| Pswas (dB) | 19.9±4.0 | 18.1±3.7 | 16.7±4.8 |
| Ceswas | 2.1±0.7 | 0.65±0.39 (MAC) | 0.47±0.33 (MAC) |
| Pbaseline (dB) | 8.6±2.6 | 8.1±4.4 | 6.5±5.9 |
| Gradient (degrees) | 83.4±7.5 | 87.7±2.9 | 87.8±6.4 |