Erector Spinae Block Using a Dexmedetomidine Versus Magnesium Sulfate as an Adjuvant to Bupivacaine

"After induction of general anesthesia the patients will be flipped to the prone position and ESP block was performed using, a high frequency linear ultrasound probe placed longitudinally 2 to 3 cm lateral to the 10th thoracic vertebrae, and the trapezius and erector Spinae muscles identified.~An 18-G Tuohy needle passed along the plane of the transducer until its tip hit the transverse process of T10; the needle was then withdrawn slightly.~Total volume of 25 ml was injected including 20 mL 0.25% bupivacaine plus 3.75 ml NS and 125 mg MgSO4 (1.25ml)."

"After induction of general anesthesia the patients will be flipped to the prone position and ESP block was performed using, a high frequency linear ultrasound probe placed longitudinally 2 to 3 cm lateral to the 10th thoracic vertebrae, and the trapezius and erector Spinae muscles identified.~An 18-G Tuohy needle passed along the plane of the transducer until its tip hit the transverse process of T10; the needle was then withdrawn slightly.~Total volume of 25 ml was injected including 20 mL 0.25% bupivacaine plus dexmedetomidine 1ug/kg."