Comparison of Erector Spinae Plane Block and Intravenous Patient-controlled Analgesia in Percutaneous Nephrolithotomy

In patients who underwent general anesthesia, after the surgical procedure was completed, after sterility was ensured for the ESP group while the patient was in the lateral position for the ESPB procedure, the linear 10-18 MHz USG probe (Esaote MyLab 30, Geneva, Italy) was placed between two transverse processes in the paramedian plane and increased from 1mg/kg to %1 at the T7 level. 20 ml of 0.5 bupivacaine (Buvasin®, Vem, Istanbul, Turkey) + 2% arrhythmic residual SF from 1mg/kg was administered. For patients in the PCA group, 200 mg of tramadol was placed in 100cc of 0.9% NaCl. Set to PCA device. A 50mg loading dose was administered 10 minutes before the patient was extubated. After extubating, a bolus dose of 20 mg was started, with a 30-minute lock-in time, and an infusion dose of 5mg/hour. The 4-hour maximum limit was set to 200 mg.