Wavelet and pain rating index for inhalation anesthesia: A randomized controlled trial

Figure 1 Flowchart describing patient recruitment, randomization, and withdrawal. BMI: Body mass index; PRi: Pain rating index; SBP: Systolic blood pressure; WLi: Wavelet index.

Figure 2 Changes in systolic blood pressure, heart rate, wavelet index, and pain rating index values at major time points during general anesthesia. A: Systolic blood pressure; B: Heart rate; C: Wavelet index; D: Pain rating index. Data are presented as mean ± standard deviation. T0: Baseline; T1: Five min after tracheal intubation; T2: Placement of the patient in the prone position; T3: Incision; T4: Vertebral plate exposure; T5: Placement of pedicle screws; T6: Spinal canal decompression; T7: Interbody fusion; T8: Placement of the fixed link; T9: Placement of drainage tube; T10: Skin closure; T11: Placement of the patient in the recovery position; T12: Tracheal extubation. PRi: Pain rating index; SBP: Systolic blood pressure; WLi: Wavelet index.