| O¨zcengiz [3] 2011 Erdil [4] 2009 Guler [5] 2005 Jia-Yao [6] 2013Masami [7] 2010
 Shukry [8] 2005 Mauricio E [9]2004
 Nidhi [10] 2013
 Qing-tao [11] 2012 Liu [12] 2012 Zhang [13] 2010 Fang [14] 2010 Wen [15] 2012 Cao [16] 2012 Zhu [17] 2011 Zhu [18] 2012 Du [19] 2012 Gan [20] 2011 Xue [21] 2011 Jia [22] 2012 Jin [23] 2011 Zhong [24] 2012 Chen [25] 2012 Wei [26] 2012 Huang [27] 2012 Huang [28] 2011 Zhao [29] 2012 | 3~9 2~7 3~7 2~71~9
 1~10 1~10 8~12 5~13 3~11 2~8 3~10 3~11 3~6 3~8 3~8 3~9 4~7 3~9 2~7 3~12 4~10 2~8 3~7 1~3 5~8 2~8 | esophageal dilatation proceduresadenoidectomy
 adenotonsillectomy strabismus surgery same-day surgery or over-night stay    surgeryoutpatient surgical
 procedures
 Inguinal hernia repair and circumcision
 spinal dysraphism
 tonsillectomy not mention Lower abdominal surgery  Oral and ENT    surgery  Oral and ENT    surgery  High ligation of the hernia sac and circumcisionadenoidectomy
 Laryngeal papilloma resection Inguinal hernia repair and circumcision
 ENT surgery
 Oral, Ophthalmologic, abdominal    surgery adenoidectomy
 Ophthalmologic operation  tonsillectomy High ligation of the processus    vaginalisInguinal hernia repair
 cleft lip and cleft palate repair Hypospadias and ENT surgery
 High ligation of the hernia sac and Orchidopexy
 | 25/25 30/30 30/30 27/2439/42
 23/23 60/30 18/18 80/40 42/21 40/20 30/30 30/30 40/20 40/40 30/30 28/28 150/150 40/40 30/30 40/40 40/40 15/15 46/23 15/15 30/30 20/20 | DEX 2.5 μg/kg, given orally DEX 0.5 μg/kg IV after tracheal intubationDEX 0.5 μg/kg IV,5 min before the end of surgery
 DEX 1 μg/kg, IV
 DEX 0.3 μg/kg IV over 10 min
 after anesthetic induction
 A continuous perioperative infusion of 0.2    μg/kg/h DEX
 DEX 0.15 μg/kg OR 0.3 μg/kg IV after anesthetic    induction
 loading dose: DEX 1 μg/kg,0.5 μg/kg/h to maintain
 loading dose: DEX 0.5 μg/kg OR 1 μg/kg IV over 10    minutes DEX 0.2 μg/kg OR 0.4 μg/kg IV before the end of surgery
 DEX 0.3 μg/kg OR 0.5 μg/kg IV after the start of    surgery
 DEX 0.5 μg/kg IV before the surgery
 DEX 0.5 μg/kg IV before the surgery
 DEX 0.5 μg/kg OR 0.7 μg/kg,iv
 DEX 0.5 μg/kg IV before anesthesia inductionDEX 0.5 μg/kg IV before anesthesia induction
 DEX 1 μg/kg IV after the start of surgery
 DEX 0.5 μg/kg IV before anesthesia induction
 DEX 0.5 μg/kg IV after the start of surgery
 loading dose: DEX 1 μg/kg,1 μg/kg/h to maintain
 DEX 1 μg/kg IV after tracheal intubation
 loading dose: DEX 0.1 μg/kg, and 0.3 μg/kg/h to    maintain
 DEX 1 μg/kg IV before anesthesia induction
 DEX 0.15 μg/kg OR 0.3 μg/kg IV before the surgery
 DEX 1 μg/kg IV, 30 min before the end of surgery
 DEX 0.2 μg/kg IV, 30 min before the end of    surgery DEX 1 μg/kg, iv
 | saline saline placebo salinesaline
 saline saline saline lactated Ringer’s saline saline saline saline saline saline saline saline saline saline saline saline saline saline saline saline saline saline | ⑤  ①②⑤⑥  ①②④⑤⑥  ②③⑤⑥ ③⑤⑥
 ②③⑤⑥  ①③⑤  ①②⑤⑥  ①②③⑤⑥  ④⑤⑥  ⑤  ②⑤⑥  ①⑤⑥  ⑤  ①②③④⑤⑥  ①②③④⑤⑥  ①⑤  ②⑤  ②⑤  ①②⑤⑥  ①③⑤⑥  ①②⑤⑥  ②③⑤⑥  ①⑤  ①⑤  ①②⑤  ①②⑤⑥  | 6 6 6 76
 7 6 7 7 1 1 1 1 1 2 2 1 2 1 6 1 2 2 1 1 1 1 |