1 Introduction
1.1 Monitoring the hypnotic component of anesthesia
1.2 The qCON
2 Methods
2.1 Data for time delay estimation
2.2 Data for evaluation of qCON at state transitions
2.2.1 Evaluation of time delay
2.2.2 Evaluation of the qCON at LOR and ROR
2.3 Statistical analysis
3 Results
3.1 Time delay of the qCON
Transition | Target qCON range | Time delay (s) (mean (SD)) | Time delay (s) [median (range)] |
---|---|---|---|
Suppression → adequate anesthesia | qCON ≥ 40 | 46 (4) | 44 (41–67) |
Suppression → awake/sedation | qCON ≥ 80 | 45 (2) | 45 (41–47) |
Adequate anesthesia → awake/sedation | qCON ≥ 80 | 26 (5) | 25 (16–38) |
Awake/sedation → adequate anesthesia | qCON ≤ 60 | 21 (5) | 20 (11–36) |
Adequate anesthesia → suppression | qCON < 3 | 52 (4) | 51 (48–63) |
Awake/sedation → suppression | qCON < 3 | 52 (4) | 50 (49–62) |
3.2 Performance of qCON between LOR and ROR
LOR (± 30 s) | LOR (± 60 s) | ROR (± 30 s) | ROR (± 60 s) | |
---|---|---|---|---|
All data | 0.63 [0.50–0.75] | 0.74 [0.62–0.85] | 0.61 [0.47–0.74] | 0.76 [0.63–0.87] |
SQI > 50 | 0.69 [0.52–0.84] | 0.85 [0.72–0.95] | 0.61 [0.47–0.74] | 0.76 [0.63–0.87] |
SQI > 75 | 0.76 [0.58–0.92] | 0.90 [0.77–0.99] | 0.62 [0.47–0.77] | 0.79 [0.67–0.90] |