Comparison of The Effects Of General Anesthesia and PECS Block Methods on Blood Counts in Patients With Breast Cancer

General anesthesia was performed by muscle relaxant(rocuronium 0,6 mg/kg), opioids(phentanyl 1-2 mcg/kg) and propofol 2mg/kg. Inhation anesthetics and remiphentanyl infusion were used for maintance general anesthesia.

With the help of ultrasonography, at the 2nd rib level, between the fasciae of the pectoralis major and minor muscles at the mid-clavicle level (PECS I block, interpectoral fascial plane block) and at the 4th rib level, at the mid-axillary level, between the fasciae of the pectoralis minor and serratus muscles (PECS II block, pectoroseratal fascial plane block) local anesthesia was applied. In patients who underwent PECS block, a high-frequency linear ultrasonography (Esaote, My LabFive-Genova, Italy) probe and a 50 mm tip insulated needle (echoplex+, Vygon Ecouen-France) were used. 0.200% bupivacaine 15 ml was applied for the PECS I block, and 0.200% bupivacaine 20 ml was applied for the PECS II block, and fascial separation was observed. Sensory control was performed in the breast and axilla area and the patients were taken into surgery.