Evaluation of Drug Spread in Ultrasound-Guided Erector Spina Plane Block With Fluoroscopy

"Patients will be placed in prone position. Mild sedation will be achieved by using 1-2 mg of midazolam and 50-75 µg of fentanyl iv. The application area will be visualized with General Electrics (GE) Logiq e Ultrasound device using 10-12 MHz linear probe or convex probe. Transverse process and erector spinae muscles will be visualised at the target vertebral level. Following local anesthesia (1-2 cc 2% lidocaine) application to the insertion site, a 20 gauge spinal needle will be inserted using the in-plane technique. The needle will be advanced up to the transverse process under ultrasound guidance. After confirming needle position with hydrodissection, 40 mg triamcinolone, 10 cc 0,5% bupivacaine, 10 cc radiopaque contrast agent solution will be injected. Imaging will performed in AP and lateral positions with fluoroscopy immediately and 30 minutes after the injection to evaluate intectate spread."