ESPB vs TPVB for Postoperative Analgesia After the Nuss Procedure

A 21-gauge 100-mm needle will be inserted into the fascial layer beneath the iliocostalis, longissimus, and spinalis muscles. A bolus of 0.25% ropivacaine 0.5 ml/kg will be injected into the fascial layer. Contralateral ESPB will be performed similarly.

A 21-gauge 100-mm insulated needle will be inserted into the paravertebral space via an in-plane parasagittal approach. After perforating the costotransverse ligament, 0.25% ropivacaine 0.5 ml/kg will be injected. Anterior movement of the pleura indicated the appropriate spread of the local anesthetics in the paravertebral space. The process will be repeated on the contralateral side.