Efficacy of local dexmedetomidine add-on for spermatic cord block anesthesia in patients undergoing intrascrotal surgeries: Randomized controlled multicenter clinical trial

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Abstract

Study objective: The objective of this study was to evaluate the effect of adding dexmedetomidine (DEX) to bupivacaine on the quality of spermatic cord block anesthesia and postoperative analgesia. Design: This is a randomized, double-blind study. Setting: This study was performed in an educational and research hospital. Patients: One hundred twenty adult males were scheduled for intrascrotal surgeries. Interventions: Patients were divided into two groups: group B received 10 mL of bupivacaine 0.25% for spermatic cord block and intravenous 50 µg of DEX and group BD received 10 mL of bupivacaine 0.25% added to 50 µg of DEX (9.5 mL bupivacaine 0. 25% + 0.5 mL [50 µg] DEX) for spermatic cord block, and for masking purposes, the patients received isotonic saline intravenously. Measurements: Time to first analgesic request, analgesic consumption, and visual analog scale (VAS) pain score in the first 24 hours postoperatively were assessed. Main results: Time to first rescue analgesic was significantly delayed in group BD in comparison with group B, median (interquartile) range, 7 (6-12) hours versus 6 (5-7) hours, (p=0.000), the mean cumulative morphine consumption (mg) in the first postoperative 24 hours was significantly lower in group BD compared with group B, 8.13±4.45 versus 12.7±3.79, with a mean difference (95% CI) of -4.57 (-6.06 to -3.07) (p=0.000); also, there was a significant reduction of VAS pain score in group BD in comparison with group B at all measured time points, VAS 2 hours (1.28±0.9 vs 1.92±0.8), VAS 6 hours (2.62±1.5 vs 3.93±1.2), VAS 12 hours (2.40±1.1 vs 3.57±0.65), VAS 24 hours (1.90±0.68 vs 2.53±0.62) (p=0.000) Conclusion: The addition of 50 µg of DEX to bupivacaine 0.25% in spermatic cord block for intrascrotal surgeries resulted in delay of first analgesic supplementation, reduction of postoperative analgesic consumption as well as improvement of the success rate of the block.

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Hetta, D. F., Kamal, E. E., Mahran, A. M., Ahmed, D. G., Elawamy, A., & Abdelraouf, A. M. S. (2017). Efficacy of local dexmedetomidine add-on for spermatic cord block anesthesia in patients undergoing intrascrotal surgeries: Randomized controlled multicenter clinical trial. Journal of Pain Research, 10, 2621–2628. https://doi.org/10.2147/JPR.S145305

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