Comparison of the Efficacy of Erector Spina Plane Block and Thoracic Epidural Analgesia After Thoracotomy

Interfascial plane (area) blocks are blocks in which the local anesthetic agent is injected into the potential area between the two fasciae. The ESPB we used in our study is a member of interfascial plane blocks. The erector is applied between the spinal muscle and the transverse process, spreading the drug from the injection site to both cranial and caudal. Unlike other defined interfascial plane blocks, ESPB can show paraspinal block characteristics since the injection site is above the transverse process.