Comparative Study Between Erector Spinae Plane Block Versus Combined Pectoralis and Serratus Interfascial Plane Blocks for Post-operative Analgesia After Thoracic Surgery.

The aim of this study is to evaluate the effect of combined pectoralis II and serratus interfascial plane blocks in comparison with erector spinae plane block on post-operative analgesia after thoracic surgeries.

Inclusion Criteria: * Body mass index (BMI) from 20 - 35 kg/m2. * ASA physical status I\&II . Exclusion Criteria: * Patients with signs of active infection or infection at the site of block placement. * Refusal of consent. * History of any motor or sensory deficits as peripheral neuropathy * History of stroke with residual muscle weakness * multiple sclerosis * pre-existing sensory loss as diabetic neuropathy, spinal cord injury * spine abnormalities as kypholordosis. * Hypersensitivity or allergy to the drugs used for block. * Patients with coagulopathy or on anticoagulant therapy. * Extended incision not covered by the block (posterior or medial extended incision).