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Item Open Access ERECTOR SPINAE PLANE BLOCK IN ABDOMINAL SURGERY: A META-ANALYSIS(Frontiers in Medicine, 2022) Viderman, Dmitriy; Aubakirova, Mina; Abdildin, Yerkin G.Background: Abdominal surgery is one of the most definitive and mainstay treatment options for abdominal pathologies in clinical practice. Acute postoperative pain is a major challenge in the postoperative period. Although opioids are commonly used for analgesia after major abdominal surgeries, they can lead to side effects, such as nausea and vomiting, constipation, pruritus, and life-threatening respiratory depression. Regional anesthetic techniques are commonly used to prevent or minimize these side effects. The objective of this meta-analysis is to assess the effectiveness of erector spinae plane block (ESPB) and standard medical (no block) pain management after major abdominal surgeries. Methods: We searched for articles reporting the results of randomized controlled trials on ESPB and no block in pain control published before May 2021. Results: The systematic search initially yielded 56 publications, 49 articles were excluded, and seven randomized clinical trials were included and analyzed. We extracted the data on postoperative opioid consumption, the efficacy of pain relief, time to the first opioid demand, and the rate of postoperative complications in the ESPB group and no block group. Conclusions: Opioid requirement and time to first analgesic request were significantly reduced in the ultrasound-guided ESPB group, but pain scores, nausea, and vomiting did not differ significantly after pooling the results of the block and no block studies. There were no reports on serious complications related to ESPB.Item Open Access INTRAVENOUS VERSUS EPIDURAL ROUTES OF PATIENT-CONTROLLED ANALGESIA IN ABDOMINAL SURGERY: SYSTEMATIC REVIEW WITH META-ANALYSIS(Journal of Clinical Medicine, 2022) Viderman, Dmitriy; Tapinova, Karina; Nabidollayeva, Fatima; Tankacheev, Ramil; Abdildin, Yerkin G.Objective: To compare the intravenous and epidural routes of patient-controlled anesthesia in abdominal surgery. Methods: We searched for randomized clinical trials that compared the intravenous and epidural modes of patient-controlled anesthesia in intra-abdominal surgery in adults. Data analysis was performed in RevMan 5.4. Heterogeneity was measured using I2 statistic. Risk of bias was assessed using the Jadad/Oxford quality scoring system. Results: Seven studies reporting 529 patients were included into the meta-analysis. For pain at rest, the mean difference with 95% confidence interval (CI) was −0.00 [−0.79, 0.78], p-value 0.99, while for pain on coughing, it was 0.43 [−0.02, 0.88], p-value 0.06, indicating that patient-controlled epidural analgesia (PCEA) was superior. For the sedation score, the mean difference with 95% CI was 0.26 [−0.37, 0.89], p-value 0.42, slightly favoring PCEA. For the length of hospital stay, the mean difference with 95% CI was 1.13 [0.29, 1.98], p-value 0.009, favoring PCEA. For postoperative complications, the risk ratio with 95% CI was 0.8 [0.62, 1.03], p-value 0.08, slightly favoring patient-controlled intravenous analgesia (PCIVA). A significant effect was observed for hypotension, favoring PCIVA. Conclusions: Patient-controlled intravenous analgesia compared with patient-controlled epidural analgesia was associated with fewer episodes of hypotension. PCEA, on other hand, was associated with a shorter length of hospital stay. Pain control and other side effects did not differ significantly. Only three studies out of seven had an acceptable methodological quality. Thus, these conclusions should be taken with caution