Interventions
All ultrasound-guided fascial plane blocks were performed before extubation at the end of surgery, in accordance with the rules of asepsis/antisepsis. In both blocks, a low-frequency convex transducer (2–5MHz, LOGIQ V1, GE Healthcare, USA) and block needles (21 G, 100mm, SonoPlex STIM Pajunk, Germany) were used. As a local anesthetic agent, 25mL of 0.25% bupivacaine (Marcaine®, Astra Zeneca, US) was used bilaterally.