Safety and efficacy of high thoracic epidural analgesia for chest wall surgery in young adolescents: A retrospective cohort analysis and a new standardised definition for success rate.

Background: Chest wall surgery for the correction of pectus excavatum or pectus carinatum has gained increased interest in recent years. Adequate pain treatment, respiratory physiotherapy and early ambulation are key to improving the outcomes. Although thoracic epidural analgesia is highly effective, its safety is controversial, leading to extensive scrutiny and questioning of its role.

Objectives: We hypothesise that thoracic epidural analgesia is effective and well tolerated to use in adolescents, with a high success rate and low pain scores.

Design: Observational retrospective cohort study.

Setting: All adolescent cases in a high-volume academic tertiary chest wall surgery centre between March 1993 and December 2017 were included.

Patients: A total of 1117 patients aged from 12 to 19 years of age and receiving either Ravvitch, Nuss or Abramson chest wall reconstruction for pectus excavatum were identified in our institutional chest wall surgery database. After applying selection and exclusion criteria, 532 patients were included in the current analysis.

Main outcome measures: The primary endpoint of this study was the safety of epidural analgesia, assessed by the incidence of acute adverse events. Secondary endpoints were block success rates using a specific novel definition, and analgesic efficacy using recorded postoperative pain scores.

Results: More than 60% of patients experienced one or more adverse events. However, all events were minor and without consequences. No serious or long-term adverse events were detected. The success rate of thoracic epidural placement was 81%. Low postoperative pain scores were observed.

Conclusion: Thoracic epidural analgesia is an extremely effective pain control technique, with a surprisingly high number of minor adverse events but safe with regard to serious adverse events.

Trial registration: The local research ethics committee approved and registered this study on 16 May 2022 (registration number: S66594).