患儿,男,8个月,母乳喂养。因排尿困难伴腹胀2天入院。入院后导尿引出小便黄清,拔管后小便仍不能排出,用金属导管导尿,可感硬物碰击声。检:T36.2℃,P108次/分,发育正常,营养中等,眼睑无浮肿,心肺正常,肝脾及两肾未触及.耻骨上膀胱区饱满,叩诊呈浊音。实验室检 Child, male, 8 months, breastfeeding. Due to dysuria with abdominal distension 2 days admission. Urine catheterization leads to yellow urine after admission, urination after extubation still can not be discharged, catheterization with a metal catheter can be felt hard objects hit the sound. Check: T36.2 ℃, P108 times / min, normal development, moderate nutrition, edema without edema, normal heart and lung, liver and spleen and the two kidneys did not touch the suprapubic area of ​​the bladder full, percussion was voiced. Laboratory test