Effectiveness of Erector Spinae Plane Block for Percutaneous Arthrodesis of Spinal Fractures

"Erector spinae plane block Procedure:~* Ultrasound scan with protective sleeve and sterile gel. Research of the thoracic spine process between T8 (for thoracic arthrodesis) and T12 (for lumbar arthrodesis)~* Once the thorny process is identified, horizontal shift to the transverse process.~* When the transverse process is spotted, sagittal rotation of the ultrasound probe~* Skin puncture with an 80 mm hyperechogenic needle in the plane of the ultrasound probe. The needle will be placed in contact with the transverse process~* Injection, after aspiration, of the solution prepared blindly by the anesthesiologist performing the procedure. For the ESPB group, a long-acting local anaesthetic: ropivacaine 3.75 mg/mL, 30 mL.~* Repetition of the gesture for the transverse controlateral process"

"Procedure for the Erector spinae plane block Procedure by NaCl 0.9%:~* Ultrasound scan with protective sleeve and sterile gel. Research of the thoracic spine process between T8 (for thoracic arthrodesis) and T12 (for lumbar arthrodesis)~* Once the thorny process is identified, horizontal shift to the transverse process.~* When the transverse process is spotted, sagittal rotation of the ultrasound probe~* Skin puncture with an 80 mm hyperechogenic needle in the plane of the ultrasound probe. The needle will be placed in contact with the transverse process~* Injection, after aspiration, of the solution prepared blindly by the anesthesiologist performing the procedure. For the control group: saline isotonic serum 30 mL.~Repetition of the gesture for the transverse controlateral process"