• Jian He, Lei Zhang, Wan You He, Dong Lin Li, Xue Qin Zheng, Qi Xia Liu, and Han Bin Wang.
• Department of Anesthesiology, The First People's Hospital of Foshan, Foshan City, China.
• Pain Res Manag. 2020 Jan 1; 2020: 1035182.

MethodsEighty-eight patients undergoing THA were randomized to receive 0.33% ropivacaine (Group QLB, n = 44) or saline (Group Con, n = 44) for QL3 block. Spinal anesthesia was then performed. Pain intensity was assessed using the visual analog scale (0: no pain to 10: worst possible pain). The primary outcome was pain scores recorded at rest at 3, 6, 12, 24, 36, and 48 h and on standing and walking at 24, 36, and 48 h postoperatively. Secondary outcomes were analgesic consumption, side effects, the 10-meter walking speed on day 6, and patient satisfaction after surgery.ResultsPostoperative pain intensity was significantly lower in Group QLB compared to Group Con at rest after 3, 6, 12, 24, 36, and 48 h (p < 0.001) and during mobilization after 24, 36, and 48 h (p < 0.001). Morphine use was significantly lower in Group QLB compared to Group Con during 0-24 h (16.0 ± 7.1 vs. 34.1 ± 7.1 mg, p < 0.001) and during 24-48 h (13.0 ± 4.0 vs. 17.4 ± 4.6 mg, p < 0.001) postoperatively. The 10-meter walking speed was higher in Group QLB compared to Group Con, both at comfortable (0.79 ± 0.13 vs. 0.70 ± 0.14 m/s, p=0.012) and at maximum speeds (1.18 ± 0.26 vs. 1.06 ± 0.22 m/s, p < 0.001). Incidences of nausea (7.3% vs. 31%, p=0.006), vomiting (7.3% vs. 26.2%, p = 0.022), and urinary retention (9.8% vs. 28.6%, p=0.030) were lower in Group QLB than in Group Con.ConclusionsUltrasound-guided QL3 block is an effective pain management technique after THA.Copyright © 2020 Jian He et al.

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