Abstract
Pain contributes to flail chest morbidities. The aim of this study was to compare the analgesic effects of ultrasound-guided erector spinae plane block (ESPB) with thoracic epidural analgesia (TEA) in patients with traumatic flail chest. Sixty patients aged 18 - 60 years, ASA I-II, with unilateral flail chest were allocated into TEA group with a loading dose of 6 ml bupivacaine 0.25% and 2 μg/ml fentanyl and ESPB group with a loading dose of 20 ml bupivacaine 0.25% and 2 μg/ml fentanyl. This was followed by continuous infusion of 6 ml/hour bupivacaine 0.125% and 2 μg/ml fentanyl in both groups for 4 days. Pain scores at rest and on coughing, rescue analgesic consumption, PaO2/FIO2 ratio, PaCO2, pulmonary functions and adverse events were recorded. In both groups, Visual Analog Scale (VAS) scores at rest and on coughing were significantly decreased after block initiation as compared to pre-block value. At all-time points, VAS scores at rest and on coughing were insignificantly different between both groups. PaO2/FIO2 ratio, forced vital capacity (FVC) and forced expiratory volume in 1 second (FEV1) were significantly increased and respiratory rate, PaCO2, were significantly decreased as compared to pre-block values of the same group without significant difference between both groups. The incidence of hypotension was significantly higher in TEA group than ESPB group. ESPB can achieve adequate analgesia in traumatic flail chest equivalent to that of TEA with significant improvement of arterial oxygenation and pulmonary functions and without serious adverse effects.
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