Background and Objectives: To determine the efficacy of unilateral transversus abdominis plane (TAP) block versus wound local infiltration for postoperative pain following laparoscopic radical prostatectomy (LRP). Methods: Data of consecutive patients who underwent extraperitoneal LRP and received either wound infiltration or unilateral TAP block for analgesia were retrospectively analyzed. The patients were divided into 2 groups based on the technique used. We compared pain intensity scores and on-demand analgesic use both during the hospital stay and post-discharge between the 2 groups. Results: A total of 48 patients were included, 27 received unilateral TAP blocks (group 1) and 21 were managed with wound infiltration (group 2). The unilateral TAP block group showed lower median pain scores on postoperative days (POD) 1 with pain scores being 0.2 (0–4) and 0.8 (0–4), respectively (p < 0.05). On POD2, the median pain intensity was 0.9 (0–5) and 1.6 (0–6) in groups 1 and 2, respectively (p < 0.05). The median number of on-demand analgesic doses during the POD1 was 0.2 (0–2) and 0.4 (0–2) in groups 1 and 2, respectively (p = 0.19). On POD2, the patients received 0.5 (0–2) and 1.1 (0–3) on-demand doses in groups 1 and 2, respectively (p < 0.05). Conclusion: Unilateral TAP block might improve pain control more pronounced after LRP than wound infiltration.

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