Continuous Erector Spinae Plane Block or Thoracic Epidural Analgesia Following Video Assisted Thoracic Surgery

US probe will be placed longitudinally 2-3 cm lateral to the T5 transvers process. From superior to inferior, three muscles will be visualized on the hyperechoic transverse process; trapezius (upper), rhomboideus major (middle), erector spinae (lower). The block needle will be inserted cranio caudal direction and then for correction of the needle 5 ml saline will be injected deep into the erector spina muscle fascia. Following confirmation of the correct position 20G catheter will be inserted 5 cm in caudal direction. 20 ml %0.25 bupivacaine will be administered for block.

Local infiltration with 2% of lidocaine under the skin, in T4/T5 intervertebral space will be administered. An 18 G Tuohy needle will be inserted at T4/T5 intervertebral space to identify epidural space using the loss of resistance technique. 20G catheter will be inserted 3-4 cm in caudal direction in the epidural space. Bolus dose of 0.125% bupivacaine 10 ml will be administered through the catheter after the negative aspiration for blood or cerebrospinal fluid