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下列检查结果对区分上、下尿路感染没有意义的是()

单选题
2021-12-28 14:45
A、尿白细胞管型
B、B超示肾盂形态异常
C、膀胱穿刺培养示大肠杆菌
D、肾区叩痛
E、外周血WBC明显升高
查看答案

正确答案
C

试题解析
上尿路感染是指肾盂肾炎,下尿路感染主要是膀胱炎,两者的鉴别诊断十分重要,教材和讲义也有明确表述。但本题难点在于各选项表述与教材原文相比,变化较大。考生应在掌握教材内容的基础上,对各选项进行分析与筛选:尿中白细胞管型既提示疾病性质(尿白细胞一感染),又提示部位(管型一肾脏),支持上尿路感染;B超示肾盂形态异常、肾区叩痛、外周血WBC明显升高也支持上尿路感染诊断。但膀胱穿刺培养示大肠杆菌只能证明为真性菌尿,而不能排除上尿路感染,只有膀胱灭菌后的尿标本细菌培养阳性者为肾盂肾炎,阴性者多为膀胱炎。故应选C。

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