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BACKGROUND: This study compares the analgesic effects and dermatomal blockade distributions of single and double injection bilateral thoracic paravertebral block (TPVB) techniques in patients undergoing reduction mammaplasty. METHODS: After obtaining ethics committee approval, 60 patients scheduled for bilateral reduction mammaplasty were included in the study. Preoperatively, the patients received one of single (Group S: T3-T4) or double (Group D: T2-T3 & T4-T5) injection bilateral TPVBs using bupivacaine 0.375% 20 ml per side. All patients were operated under general anesthesia. The T3-T6 dermatomal blockade distributions on the midclavicular line were followed by pin-prick test for 30 min preoperatively and 48 h postoperatively. All patients received paracetamol 1 g when numeric rating scale (NRS) pain score was ≥ 4, and also tramadol 1 mg/kg when NRS was ≥ 4 again after 1 h. The primary endpoint was NRS pain scores at postoperative 12th h. The secondary endpoints were dermatomal blockade distributions and NRS scores through the postoperative first 48 h, time until first pain and the analgesic consumption on days 1 and 2. RESULTS: Fifty-two patients completed the study. The NRS pain scores at 12th h were similar (right side: P = 0.100, left side: P = 0.096). The remaining NRS scores and other parameters were also comparable within the groups (P ≥ 0.05). Only single injection TPVB application time was shorter (P < 0.001). CONCLUSIONS: The single injection TPVB technique provided sufficient dermatomal distribution and analgesic efficacy with the advantages of being faster and less invasive.
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INTRODUCTION: Ultrasound guided caudal epidural block (CEB) and transversus abdominis plane block (TAPB) are two techniques which are used for pain management after inguinal hernia surgeries (IHR). CEB is accepted as gold standard for lower abdominal surgeries while TAPB is more popular. OBJECTIVE: It is aimed to compare ultrasound guided CEB and TAPB for postoperative pain scores, additional analgesic requirement and chronic pain development in pediatric bilateral open IHR. STUDY DESIGN: Seventy patients aged 1-7 years undergoing bilateral open IHR were included in this prospective, randomized, double-blinded study. Patients were randomized into group T (Bilateral TAPB) and group C (CEB). Postoperative FLACC (Face, Legs, Activity, Cry, Consolability) scores were evaluated for pain density. Additional analgesic requirement, length of hospital stay was also recorded. Chronic pain is evaluated within a subgroup by using "revised Bieri faces pain scale" in the postoperative second month. RESULTS: Postoperative 15th, 30th, 45th min, first, second hour FLACC scores were similar in both groups (P > 0.05). In group C, FLACC scores at postoperative sixth and 24th were significantly higher than group T (1 (0-5) vs 0 (0-2); 1 (0-3) vs 0 (0-2), respectively; P < 0.001). Additional analgesic requirement in the postoperative 24 h was found to be statistically higher in Group C (56.7%) than in Group T (20%) (P < 0.01). Chronic pain development did not differ between the groups (P > 0.05). Length of hospital stay was found to be shorter in patients in Group T compared to patients in Group C [10 (5-14) vs 16 (5-18) hours, respectively; P < 0.01)]. DISCUSSION: Our results exhibited that TAPB and CEB for bilateral IHR have similar early analgesic efficacy in children. However; CEB patients experienced higher FLACC scores at the postoperative sixth and 24th hours, and the need for additional analgesics was higher and the length of hospital stay was longer comparing to TAPB. Of note, chronic pain was not observed in any of our subgroup patients (n = 21) who are older than four years. CONCLUSION: For bilateral IHR, US-guided CEB and TAPB have similar analgesic efficacy in the first six hours, postoperatively, However, TAPB appears to be slightly superior than CEB in terms of subacute pain and length of stay which is still not clinically distinctive.
