Perioperative Nerve Blockade Reduces Acute Postoperative Pain after Orthognathic Surgery

Table 3

Postoperative pain parameters.

	Preblock group	No preblock group	value
	12.5 [0.0–50.0]	50.0 [31.3–77.5]	0.001
	17.5 [4.0–30.0]	30.0 [16.3–45.3]	0.034
VASAUC_6 (mm × day)	3.5 [2.0–7.2]	7.4 [5.1–10.0]	0.0007
VASAUC_12 (mm × day)	9.5 [6.4–13.7]	15.0 [7.6–22.9]	0.042
VASAUC_18 (mm × day)	15.7 [10.3–23.1]	29.3 [18.9–37.2]	0.0002
VASAUC_24 (mm × day)	17.6 [12.7–27.2]	39.5 [22.9–46.9]	0.001
VASAUC (mm × day)	214.4 [96.2–263.1]	273.3 [141.8–399.7]	0.093
Analgesic requirement period (days)	7.2 [6.1–10.0]	8.1 [6.1–10.2]	0.215
Number of days with pain (days)	12.7 [8.7–14.5]	12.6 [7.9–14.4]	0.422

Preblock group, nerve blockade was performed before emergence from general anesthesia; no preblock group, nerve blockade was not performed before emergence from general anesthesia. VAS, visual analog scale; VASAUC, VAS score area under the curve; VASAUC_6, VASAUC for postoperative hour 6; VASAUC_12, VASAUC for postoperative hour 12; VASAUC_18, VASAUC for postoperative hour 18; VASAUC_24, VASAUC for postoperative hour 24; denotes the operative pain intensity at return to the ward. denotes the operative pain intensity 1 hour after the patient returned to the ward. The number of days with pain denotes the number of days required for postoperative pain to reach 0/100 on the VAS. N, number of patients. Preblock group, N = 22; no preblock group, N = 34. Data are presented as median (interquartile range) values. The t-test was performed to determine the difference between two groups in spite of the analgesic requirement period and number of days with pain, which was performed with the Welch t-test.  < 0.05;  < 0.005.