[摘要] 目的 研究C反应蛋白(CRP)与降钙素原(PCT)检测对小儿重症肺炎的疗效评估。 方法 研究对象选取2016年1月~2017年4月间我院收治的96例重症肺炎患儿设为观察组,选取同期健康儿童100例作为对照组,采用散射比浊法测量患儿的血浆CRP水平,采用电化学发光法测定PCT水平,对比两组CRP及PCT水平差异,根据疗效将观察组患儿分为治愈组和未治愈组,对比两组患儿的CRP、PCT水平差异,根据存活患儿的疗效情况绘制ROC曲线。 结果 观察组CRP及PCT水平均显著高于对照组,差异有统计学意义(P /6/view-10689322.htm
[关键词] 重症肺炎;C反应蛋白;降钙素原;疗效评估
[中图分类号] R725.6 [文献标识码] A [文章编号] 1673-9701(2018)04-0032-03
[Abstract] Objective To investigate the evaluation efficacy of C-reactive protein (CRP) and procalcitonin(PCT)determination in pediatric severe pneumonia. Methods 96 children patients with severe pneumonia who were admitted to our hospital from January 2016 to Apirl 2017 were selected as observation group. 100 healthy children were selected as the control group. Plasma CRP levels were measured by scatter turbidimetry, the electrochemical luminescence method was used to determine the level of PCT, and the differences of CRP and PCT levels between the two groups were compared. According to the efficacy, the children patients in the observation group were divided into cure group and non-cure group. The differences of CRP and PCT levels were compared between the two groups. ROC curves were drawn based on the efficacy of surviving children patients. Results The levels of CRP and PCT in the observation group were significantly higher than those in the control group, and the differences were statistically significant(P 1 资料与方法
1.1 一般资料
研究对象选取2016年1月~2017年4月间我院收治的96例重症肺炎患儿作为观察组,选取同期健康儿童100例作为对照组,观察组包括男52例,女44例,年龄1~11岁,平均(4.9±1.2)岁;对照组包括男55例,女45例,年龄1~12岁,平均(5.2±1.1)岁。两组患儿的基线资料比较无显著差异(P>0.05)。纳入标准[6]:(1)符合重症肺炎诊断;(2)年龄≤12岁;(3)监护人知情同意参与研究。排除标准:(1)合并其他感染;(2)合并脏器功能衰竭;(3)检测资料不全。
1.2 方法
观察组于入院当天清晨抽取空腹肘静脉血2 mL,对照组则在检测当天清晨抽取空腹肘静脉血2 mL,均行CRP及PCT水平检测。采用散射比浊法测定两组CRP水平,仪器为贝克曼公司产AU680型CRP分析仪及配套试剂盒;采用电化学发光法测定PCT水平,仪器为罗氏Cobas e411型全自动化学发光仪及配套试剂。检验过程均严格按照试剂盒说明书进行。
1.3 评价方法
对比两组CRP及PCT水平差异;根据疗效将观察组患儿分为治愈组和未治愈组,比较两组患儿的CRP、PCT水平差异;根据存活患儿的疗效情况,以敏感度为纵轴,特异度为横轴绘制ROC曲线,计算并对比单独CRP、单独PCT及联合检测的曲线下面积。
1.4 统计学方法
数据录入SPSS 20.0软件包处理,计量资料以(x±s)表示,采用t检验,计数资料以[n(%)] 表示,采用χ2检验,P0.05)。?图1。
3 讨论
肺炎是儿科的常见病,重症肺炎会累及多个组织器官,甚至威胁患儿的生命安全。有研究显示[7],重症肺炎患儿的死亡率与病情的严重程度密切相关,但仅根据病情程度来评估预后仍有失客观。CRP是一种急性时相反应蛋白,主要由肝脏合成并释放入血,正常人体的血清CRP水平保持在一个较低的水平,当机体发生创伤或感染后CRP水平分泌增多并被大量释放入血,导致血清CRP水平显著增高[8]。有学者研究表明[9],CRP能够作为细菌感染的首要评估指标,敏感性及特异性分别达到88.4%和89.2%。但CRP对各组织创伤、感染等疾病均有响应,近年来的研究发现,CRP对于恶性肿瘤也有响应机制,因此缺乏特异性[10]。PCT属于降钙素前肽物质,在正常生理状态下由甲状腺C细胞合成分泌,属于全身系统炎症反应物质的一种,正常状况下血清含量较低,当机体发生细菌感染后PCT水平显著增高,且敏感性较好,近年来在多种感染疾病诊断中有着较好的应用[11-13]。
从本次研究数据来看,观察组CRP及PCT水平均显著高于对照组,说明无论是CRP还是PCT均能够作为重症肺炎的诊断指标,但两种指标均不属于特异性指标,在作为诊断依据时仍要结合患儿的临床表现。观察组96例患儿死亡率为12.5%,与黄晓妹[14]和王岩等[15]的研究结果相近,从治愈组和未治愈组的CRP、PCT水平对比来看,治愈组患儿的CRP、PCT水平均要显著低于未治愈组,说明CRP、PCT水平能够一定程度上反映患儿的转归情况,也反映了肺炎的进展程度。从两种指标对小儿重症肺炎的疗效评估对比来看,CRP联合PCT检测的ROC曲线下面积要显著高于CRP、PCT单独检测,但CRP、PCT单独检测的曲线下面积对比无显著差异,说明两种检测指标单独用于小儿重症肺炎的疗效评估效果相近,但联合检测能够显著提高检测价值。
综上所述,C反应蛋白和降钙素原是评估小儿重症肺炎疗效及预后的重要指标,联合检测能够提高预测价值,值得在临床上推广和应用。
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(收稿日期:2017-11-03)