• Mauricio Arce Villalobos, Giorgio Veneziano, Rebecca Miller, Ralph J Beltran, Senthil Krishna, Dmitry Tumin, Kevin Klingele, and Joseph D Tobias.
• Department of Anesthesiology & Pain Medicine, Nationwide Children's Hospital, Columbus, OH, USA.
• J Pain Res. 2019 Jan 1; 12: 997-1001.

AbstractBackground:There continues to be focus on the value of regional and neuraxial anesthetic techniques when combined with general anesthesia to improve postoperative analgesia. The reported advantages include decreased postoperative opioid requirements, decreased medication-related adverse effects, decreased hospital length of stay, and increased patient satisfaction. Orthopedic procedures of the hip may be amenable to such techniques as there is significant postoperative pain with the requirement for hospital admission and the administration of parenteral opioids. Given the surgical site, various regional anesthetic techniques may be used to provide analgesia including caudal epidural anesthesia (CEA) or lumbar plexus blockade (LPB). Purpose: The objective of this study was to assess the effectiveness of LPB versus CEA as an analgesic thechnique for patients undergoing elective hip surgery from the opioid consumption and pain scores perspective. Patients and methods: The current study retrospectively reviews our experience with CEA and LPB for postoperative analgesia after hip surgery in the pediatric population. Regional anesthesia technique was reviewed as well as opioid requirements and pain scores. Results: The study cohort included 61 patients, 29 who received an LPB and 32 who received CEA. No difference was noted in the demographics between the two groups. Intraoperative opioid use was 0.7 (IQR: 0.5, 1.1) mg/kg of oral morphine equivalents (MEs) in the LPB group compared to 0.6 (IQR: 0.5, 0.9) in the CEA group (p=0.479). Postoperative opioid use over the first 48 hrs was 4 (IQR: 1, 6) mg/kg of oral ME in the LPB group, compared to 2 (interquartile range [IQR]: 1, 3) in the CEA group (p=0.103). Over the first 24 hrs after surgery, the median pain score in the LPB group was 5 (IQR: 1-6), compared to 3 (IQR: 0, 5) in the CEA group (p=0.014).Conclusion: These retrospective data suggest a modest postoperative benefit of CEA when compared to LPB following hip surgery in the pediatric population. Postoperative pain scores were lower in patients receiving CEA; however, no difference in the intraoperative or postoperative opioid requirements was noted between the two groups.

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