Modified Thoracolumbar Interfascial Plane Block Versus Erector Spinae Plane Block For Enhancement Of Quality of Recovery After Lumbar Spine Surgery: A Prospective Randomized Controlled Study.

Inclusion Criteria: * Patient scheduled for elective lumbar spine fixation 2-3 levels. * American Society of Anesthesiologists(ASA) class I-III. Exclusion Criteria: * 1\. Obese patients (Body Mass Index\> 35). 2. Patients with neurological deficits, cardiopulmonary disease, hepatic or renal impairment. 3\. Patients with history of severe allergies to local anesthetics or other medications used during the procedure. 4\. Patients with history of coagulation disorder or anticoagulants. 5. Patients with emergency surgeries or re-do surgeries. 6. Patients with systemic infections or infections at the site of injection. 7. Patients with Psychiatric illnesses. 8. Patients with history of drug addiction