Postoperative Analgesic Effects of Different Doses of Epidural Hydromorphone Coadministered with Ropivacaine after Cesarean Section: A Randomized Controlled Trial

Table 2

Results for VAPSs at 2, 4, 6, 12, and 24 h after injecting epidural hydromorphone and total analgesic requirement (PCIA with sufentanil) in the first 24 h.

	Group H0 ()	Group H1 ()	Group H2 ()	Group H3 ()
2 h	0.9 ± 0.6	0.95 ± 0.5	0.65 ± 0.6	0.6 ± 0.5
4 h	2.8 ± 0.9	2.4 ± 0.7	1.3 ± 0.9	0.7 ± 0.6
6 h	2.8 ± 0.7	2.7 ± 0.7	2.1 ± 0.7	0.8 ± 0.7
12 h	3.1 ± 0.8	2.9 ± 0.7	2.8 ± 0.6	1.0 ± 0.9
24 h	3.2 ± 0.7	3.1 ± 0.6	3.2 ± 0.7	2.5 ± 0.8
Total sufentanil required at 24 h (μg)	90 ± 26	75 ± 29	54 ± 32	15 ± 16

Data are mean ± SD. versus group H0. VAPSs = visual analogue pain scores. PCIA = patient-controlled intravenous analgesia.