ASSESSMENT OF THE EFFECTIVENESS OF ANALGESIA AFTER UPPER EXTREMITY SURGERY IN CHILDREN WITH ULTRASOUND-GUIDED BRACHIAL PLEXUS BLOCKS AT NGHE AN OBSTETRIC AND PEDIATRIC HOSPITAL FROM 02/2022 TO 10/2022. YHCĐ. 2022;63(chuyên đề 3-HN Sản Nhi Nghệ An). doi:10.52163/yhc.v63i8.508