Ultrasound-guided continuous erector spinae plane block vs continuous thoracic epidural analgesia for the management of acute and chronic postthoracotomy pain: a randomized, controlled,double-blind trial.

Abstract

Postthoracotomy pain (PTP) is a severe pain complicating thoracic surgeries and its good management decreases the risk of PTP syndrome (PTPS). This randomized controlled study evaluated the efficacy of ultrasound-guided continuous erector spinae plane block (ESPB) with or without dexmedetomidine compared with thoracic epidural analgesia (TEA) in managing acute postoperative pain and the possible emergence of PTPS. Ninety patients with chest malignancies planned for thoracotomy were randomly allocated into 3 equal groups. Group 1: TEA (20 mL of levobupivacaine 0.25% bolus, then 0.1 mL/kg/h of levobupivacaine 0.1%), group 2: ESPB (20 mL of levobupivacaine only 0.1% bolus every 6 hours), and group 3: ESPB (20 mL of levobupivacaine 0.25% and 0.5 μg/kg of dexmedetomidine Hcl bolus every 6 hours). Resting and dynamic visual analog scales were higher in group 2 compared with groups 1 and 3 at 6, 24, and 36 hours and at 8 and 12 weeks. Postthoracotomy pain syndrome incidence was higher in group 2 compared with groups 1 and 3 at 8 and 12 weeks, whereas it was indifferent between groups 1 and 3. The grading system for neuropathic pain score was higher in group 2 compared with groups 1 and 3 at 8 and 12 weeks, whereas it was indifferent between groups 1 and 3. Itching, pruritis, and urine retention were higher in group 1 than in ESPB groups. Ultrasound-guided ESPB with dexmedetomidine is as potent as TEA in relieving acute PTP and reducing the possible emergence of chronic PTPS. However, the 2 techniques were superior to ESPB without dexmedetomidine. Erector spinae plane block has fewer side effects compared with TEA.