Department of Pediatric Surgery Chinese PLA General Hospital Beijing 100853 China;
Department of Pediatric Surgery Chinese PLA General Hospital Beijing 100853 China;
Department of Pediatric Surgery Chinese PLA General Hospital Beijing 100853 China;
Department of Pediatric Surgery Chinese PLA General Hospital Beijing 100853 China;
Department of Pediatric Surgery Chinese PLA General Hospital Beijing 100853 China;
Pediatric surgery; Developmental hip dislocation; Pediatric care; Postoperative complications; Perineal swelling;