PK/PD Levobupivacaine with and Without Epinephrine After Ultrasound Guided ESP Block

"The block will be performed under ultrasound vision at T5 level, with the patient seated.~Once the ultrasound image is achieved, a 100 mm, 20 G Stimuplex needle will be punctured and a solution of levobupivacaine 0.25% with epinephrine 5 ug / ml until completing a volume of 20 ml in fractional form."

"The block will be performed under ultrasound vision at T5 level, with the patient seated.~Once the ultrasound image is achieved, a 100 mm, 20 G Stimuplex needle will be punctured and a solution of levobupivacaine 0.25% without epinephrine 5 ug / ml until completing a volume of 20 ml in fractional form."