血清淀粉样蛋白A在儿童乙型流感早期诊断中的临床价值探讨

目的 探讨血清淀粉样蛋白A(SAA)、C反应蛋白(CRP)和血常规中白细胞(WBC)计数等指标,在协助儿童乙型流感早期诊断中的临床价值.方法 检测114例乙型流感组患儿和106例对照组儿童的SAA、CRP、血常规中白细胞(WBC)计数水平,计算SAA/CRP比值.分析两组间白细胞(WBC)计数、SAA、CRP、SAA/CRP比值的关系,并采用受试者工作特征曲线(ROC)评价各指标在判断乙型流感病毒感染方面的诊断效能.结果 乙型流感组SAA、SAA/CRP、WBC计数与对照组相比,差异有显著统计学意义(P<0.01).乙型流感组CRP与对照组相比,差异有统计学意义(P=0.01).ROC曲线分析显示,乙型流感组SAA、SAA/CRP的曲线下面积(AUC)均>0.8(P<0.01),灵敏度分别为85.10％、73.70％,特异性分别为80.20％、92.50％.结论 SAA、SAA/CRP比值可作为病毒感染的诊断指标,可以协助早期诊断儿童乙型流感病毒感染,对开展早期治疗具有指导意义,具有一定的临床价值.     

ACS患者血清25(OH)D、TSH、CRP/ALB比值和PCT水平及其临床意义

目的 探讨急性冠状动脉综合征(acute coronary syndrome,ACS)患者血清25羟基维生素D[25 OH Vitamin D,25(OH)D]、促甲状腺激素(thyroid stimulating hormone,TSH)、C反应蛋白/白蛋白(C- reactive protein/Albmin,CRP/ALB)比值和降钙素原(procalcitonin,PCT)水平相关性的临床分析。方法 生化法等测定了126例ACS患者,其中67例不稳定性心绞痛(unstable angina pectoris,UAP)和59例急性心肌梗死(acute myocardial infarction,AMI),106例SAP患者和100例正常对照组(normal controls,NC)血清25(OH)D、TSH、CRP/ALB和PCT水平并进行对比性分析。受试者工作特征曲线(receiver operating characteristic curve,ROC curve)评估了ACS患者早期诊断的价值。结果 126例患者较之100例NC、106例SAP患者,血清25(OH)D水平明显降低( P <0.01),血清TSH、CRP/ALB和PCT水平明显增高( P 均<0.01)。ROC曲线显示:血清25(OH)D、TSH、CRP/ALB和PCT的临界值分别为15.36ng/mL、7.64mIU/L、4.36和0.45ng/mL,曲线下面积(area under the curve,AUC)分别为0.853、0.608、0.887和0.918,灵敏度83.0%~88.5%,特异性87.4%~ 92.4%。结论 血清25(OH)D、TSH、CRP/ALB和PCT水平具有早期诊断和鉴别诊断ACS的临床价值。     

超敏C反应蛋白等指标在川崎病的动态变化和临床诊断价值

目的:观察川崎病(KD)患儿治疗前后全血超敏C反应蛋白(hs-CRP)、C反应蛋白(CRP)含量和白细胞计数(WBC)、血小板计数(PLT)指标变化,并探讨它们对KD的临床诊断价值。方法:37例KD患儿(KD组)和65例健康幼儿(正常对照组)采用常规方法平行检测hs-CRP、CRP、WBC和PLT水平,并分析各指标组间差异和KD患儿治疗前后变化。通过ROC曲线分析比较各指标对KD的临床诊断价值。结果:KD组治疗前hs-CRP、CRP、WBC和PLT均较正常对照组明显升高(P0.01);治疗后hs-CRP、CRP和WBC均较治疗前降低(P0.01),而PLT在治疗后升高(P0.01)。ROC曲线分析显示hs-CRP和CRP的cut-off值分别为0.51mg/L和5.50mg/L时,两者ROC曲线下面积(AUC)分别为0.964和0.957,敏感度分别为97.30%和91.92%,特异度分别是56.87%和95.40%,临床诊断价值明显优于WBC和PLT。结论:快速检测全血hs-CRP、CRP、WBC可用于KD动态监测;hs-CRP和CRP对KD有重要临床诊断价值。     

血清降钙素原在评估老年肺炎病情严重程度及预后中的临床应用价值

目的 探讨血清降钙素原(procalcitonin,PCT)在评估老年社区获得性肺炎(community-acquired pneumonia,CAP)病情严重程度及预后中的临床应用价值.方法 选择2015年6月至2017年4月我院收治的120例老年肺炎患者作为观察组,按严重程度(CURB-65分级标准)分为低危组(0～1分),中危组(2分),高危组(3～5分)三组,同时选择72例非感染性疾病患者作为对照组,对比分析治疗前后血清PCT及C-反应蛋白(C-reactive protein,CRP)水平;观察组患者根据治疗前PCT水平分为两组,即PCT≤10 ng/mL组和PCT＞ 10 ng/mL组,分析两组患者的预后差异.结果 治疗前观察组患者PCT(9.24±2.05 ng/mL)及CRP(48.14±5.38 mg/L)水平均高于对照组(0.95±0.52 ng/mL,4.46±0.68 mg/L),差异有统计学意义(P＜0.05);观察组中,治疗前低危组PCT水平(4.33±1.48 ng/mL)低于中危组(8.72 ±2.58 ng/mL)及高危组(19.42±3.88ng/mL),差异具有统计学意义(P＜0.05),中危组PCT水平低于高危组,差异具有统计学意义(P＜0.05),治疗后低危组和中危组PCT水平显著下降,差异有统计学意义(P＜0.05);治疗前低危组、中危组、高危组的CRP水平无统计学差异(P＞0.05),治疗后CRP水平较治疗前相比差异无统计学意义(P＞0.05);治疗前PCT≤10 ng/mL组的痊愈率明显高于PCT＞ 10 ng/mL组(P＜0.01).结论 血清PCT可用于老年肺炎的诊断,血清PCT水平与老年肺炎患者病情严重程度密切相关,也可用于患者疗效判断和预后评估.     

小儿肺炎中PCT、WBC、hs-CRP检测对疾病诊断及预后判断价值分析

目的 分析小儿肺炎中PCT、WBC、hs-CRP检测对疾病诊断及预后的判断价值.方法 选取2015年5月至2016年4月在本院住院治疗的肺炎患儿120例作为观察组,健康儿童65例作为对照组.检测治疗前后患儿及健康儿童血清PCT、WBC、hs-CRP的变化.结果 治疗前,细菌感染组WBC数量(15.5±3.4)×109/L、hs-CRP水平(19.8±2.6) mg/L和PCT水平(21.9±2.1)ng/mL均明显高于非细菌感染组(6.8 ±2.3)×109/L、(4.5±2.3)mg/L、(4.7±1.8) ng/mL和健康对照组(8.1 ±1.4)×109/L、(3.5±1.2) mg/L、(1.8±0.5) ng/mL,且差异具有统计学意义(P＜0.05).而非细菌感染组和健康对照组的WBC、hs-CRP和PCT结果差异无统计学意义(P＞0.05);治疗后,细菌感染组WBC数量(7.3±1.4)×109/L、hs-CRP水平(5.1 ± 1.2) mg/L和PCT水平(2.3 ± 1.2) ng/mL均明显低于治疗前,差异具有统计学意义(P＜0.05);WBC、hs-CRP、PCT联合检测的灵敏性95.2％、特异性93.0％、准确度93.3％显著高于WBC、hs-CRP、PCT单独检测,差异具有统计学意义(P＜0.05).结论 在小儿肺炎治疗过程中,动态监测患儿血清的WBC、hs-CRP、PCT的变化,并结合临床,有助于诊疗和判断患儿疾病愈后的情况,具有显著的临床意义,值得推广应用.     

降钙素原检测在新生儿败血症早期诊断中的应用

目的：探讨血清降钙素原(PCT)作为早期诊断新生儿败血症指标的应用价值。方法应用固相免疫测定法测定84例新生儿血清中降钙素原(PCT),C反应蛋白(CRP)水平,其中败血症组30例、一般感染组28例、非感染组26例。结果败血症组患儿血清PCT、CRP水平显著高于一般感染组和非感染组,差异有统计学意义(P<0.05);一般感染组与非感染组血清中PCT、CRP水平比较差异有统计学意义(P<0.05)。以0.5ng/mL为临界值,PCT诊断新生儿败血症的敏感度为93.3%,特异度为80.8%;以8.0mg/L为临界值,诊断败血症的敏感度为70.0%,特异度为69.2%。与CRP相比,PCT诊断败血症的敏感性、特异性更高。经抗生素有效治疗后,血清PCT下降幅度明显大于血清CRP下降幅度。结论新生儿血清PCT水平的检测对败血症的早期诊断与疗效评价具有重要价值。     

降钙素原、中性粒细胞CD64、IL-6和CRP检测在新生儿感染性疾病中的诊疗价值

为探讨降钙素原(procalcitonin,PCT)、中性粒细胞CD64、IL-6和CRP早期诊断新生儿感染性疾病及判断预后的价值,选择感染患儿,根据临床表现及血常规、细菌学培养等检查结果确定为细菌组60例、病毒组50例,分别在入院治疗前及治疗3 d后采集空腹血进行PCT、中性粒细胞CD64、IL-6及CRP水平测定,对照组(60例,同期住院的非感染患儿)检测其PCT、中性粒细胞CD64、IL-6及CRP水平,进行统计学分析。采用双抗体夹心免疫层析法测定血清PCT和IL-6水平;采用FCM测定中性粒细胞CD64百分比;采用Aristo特定蛋白分析仪测定CRP水平。结果显示,治疗前细菌组PCT、中性粒细胞CD64、IL-6和CRP水平均明显高于病毒组和对照组(P0.05);病毒组与对照组比较,PCT、中性粒细胞CD64、IL-6和CRP水平差异无统计学意义(P 0.05)。PCT、中性粒细胞CD64、IL-6和CRP诊断新生儿细菌感染性疾病的截断值分别为:0.56 ng/mL、7.01%、8.79 pg/mL、14.5 mg/L。治疗后有效组PCT、中性粒细胞CD64、IL-6和CRP水平与治疗前比较均明显下降(P0.05),治疗后无效组PCT、中性粒细胞CD64和IL-6水平与治疗前比较均无明显变化(P 0.05)。提示PCT作为早期检测感染性疾病的标志物,对新生儿细菌感染更为敏感,而PCT、中性粒细胞CD64、IL-6和CRP可作为新生儿感染性疾病早期诊断、疗效判断的重要指标。     

PCT、CRP动力学评估脓毒血症预后及诊断意义的研究

目的 观察血清降钙素原(PCT)、C反应蛋白(CRP)及其动力学变化,评估其在严重脓毒症/感染性休克患者的诊断及预后价值.方法 本研究采用回顾性分析方法,2014年9月1日至2016年4月30日选择184例ICU中被诊断为严重脓毒症/感染性休克疾病患者,检测入院时血清PCT、CRP水平和治疗后第2,第3和第5天的PCT、CRP水平.结果 通过△PCT、△CRP评估PCT、CRP的动力学在存活者与死亡组中有显著性统计学意(△PCT2/0,P=0.0001;△PCT3/0,P=0.0001;△PCT5/0,P=0.0001;△CRP2/0,P=0.0069;△CRP3/0,P=0.0001;△CRP5/0,P=0.0001),在严重脓毒症和感染性休克组中也存在显著差异(PCT5,P=0.007;△PCT5/0,P=0.007).受试者工作特征曲线(ROC)模型显示,△PCT3/0(AUC=0.721)、△PCT5/0(AUC=0.77)、△CRP5/0(AUC=0.766)水平判断严重脓毒症/感染性休克患者预后有较好的临床意义.△PCT5/0 (0.619)对严重脓毒症或感染性休克有一定的辅助诊断效果,其在ROC曲线上灵敏度、特异性均较高的临界点为0.624,所以,以第5天的血清△PCT5/0水平＞0.624可作为预测感染性休克的临界点.结论 血清中PCT、CRP对严重脓毒症/感染性休克早期有较好的临床诊断及预后价值,其动力学研究可以提高对严重脓毒症/感染性休克诊断及预后评估的敏感性及准确性.     

脂多糖结合蛋白在脓毒症患者诊断和预后预测中的作用

目的:探讨脂多糖结合蛋白(LBP)在脓毒症患者诊断和预后预测中的作用。方法:挑选ICU的患者共80名,患者分为全身炎症反应综合征(SIRS)组(阴性对照组)、脓毒症存活组和脓毒症死亡组;所有患者均于进入ICU后24 h内采集血清样本并进行APACHEⅡ评分分析;另挑选10名健康志愿者血清作为正常对照组;ELISA检测各组样本血清LBP、C反应蛋白(CRP)和降钙素原(PCT)浓度;并以APACHEⅡ评分、血清LBP、CRP和PCT浓度对脓毒症诊断和预后预测做ROC曲线,评价LBP在脓毒症患者诊断和预后预测中的作用。结果:与SIRS组相比,脓毒症组的APACHEⅡ评分、血清LBP、CRP、PCT浓度均升高(P0.05);与脓毒症存活组相比,死亡组的APACHEⅡ评分和血清LBP浓度升高(P0.05),而血清CRP和PCT浓度在脓毒症存活组与死亡组之间的差异无统计学意义;LBP血清浓度高于26.84 mg/L时诊断脓毒症的敏感性和特异性分别为97.1%和95.9%;LBP血清浓度高于54.16 mg/L时预测脓毒症预后的敏感性和特异性分别为85.2%和80.0%。结论:与传统的脓毒症生物标志物CRP、PCT相比,LBP在脓毒症的诊断和预测方面都具有更好的效果。     

PCT、CRP、腹水乳铁蛋白及LBP联合检测在自发性细菌性腹膜炎患者诊断中的临床价值

目的分析降钙素原(PCT)、C反应蛋白(CRP)、腹水乳铁蛋白(LF)及脂多糖结合蛋白(LBP)水平变化在肝硬化合并自发性细菌性腹膜炎患者诊断中的临床价值。方法选取2016年5月至2017年12月在我院接受治疗的110例肝硬化患者作为研究对象,并根据是否并发SBP分为SBP组(55例)和非SBP组(55例)。分别检测两组患者肝功能相关指标,采用电化学发光法、免疫比浊法及酶联免疫吸附法检测两组患者PCT、CRP、腹水LF及LBP水平。运用ROC曲线评价各指标对SBP的诊断价值。结果 SBP组患者肝功能指标AST、ALT、TBIL及ALB与非SBP组相比差异均有统计学意义(P <0.05)。SBP组PCT、CRP、腹水LF及LBP水平均显著高于非SBP组,两组比较差异具有统计学意义(P <0. 05)。PCT、CRP、腹水LF及LBP的ROC曲线下面积(AUC)依次为0.735、0.831、0.706及0.812,四项指标联合检测AUC最大为0.926,显著高于其他各单项指标(P <0. 05)。四项指标联合检测的灵敏度为94.54%、阴性预测值为93.88%,均显著高于各单项指标的检测结果 (P <0.05)。结论 PCT、CRP、腹水LF及LBP联合检测可有效提高肝硬化患者合并自发性细菌性腹膜炎诊断的灵敏度和准确度,具有较高的临床参考价值。     

Serum procalcitonin for differentiating bacterial infection from disease flares in patients with autoimmune diseases

Early differentiation between bacterial infections and disease flares in autoimmune disease patients is important due to different treatments. Seventy-nine autoimmune disease patients with symptoms suggestive of infections or disease flares were collected by retrospective chart review. The patients were later classified into two groups, disease flare and infection. C-reactive protein (CRP) and serum procalcitonin (PCT) levels were measured. The CRP and PCT levels were higher in the infection group than the disease flare group (CRP,11.96 mg/dL ± 9.60 vs 6.42 mg/dL ± 7.01, P = 0.003; PCT, 2.44 ng/mL ± 6.55 vs 0.09 ng/mL ± 0.09, P < 0.001). The area under the ROC curve (AUC; 95% confidence interval) for CRP and PCT was 0.70 (0.58-0.82) and 0.84 (0.75-0.93), which showed a significant difference (P < 0.05). The predicted AUC for the CRP and PCT levels combined was 0.83, which was not significantly different compared to the PCT level alone (P = 0.80). The best cut-off value for CRP was 7.18 mg/dL, with a sensitivity of 71.9% and a specificity of 68.1%. The best cut-off value for PCT was 0.09 ng/mL, with a sensitivity of 81.3% and a specificity of 78.7%. The PCT level had better sensitivity and specificity compared to the CRP level in distinguishing between bacterial infections and disease flares in autoimmune disease patients. The CRP level has no additive value when combined with the PCT level when differentiating bacterial infections from disease flares.     

Étude comparative de la protéine C-réactive et de la procalcitonine dans le diagnostic de sévérité des pyélonéphrites aiguës de l’enfant

ObjectiveThe aim of this study is to compare two biologic parameters; C-reactive protein (CRP) and procalcitonin (PCT) in the detection of acute renal lesions assessed by DMSA scintigraphy in the urinary tract infection in child.DesignIn a prospective study, serum PCT, CRP and leukocyte counts were measured for children admitted, between January and December 2010, with a first episode of febrile urinary tract infection.ResultsSeventy-five children were enrolled in the study. Thirty-three patients had renal lesions (group A) and 42 had a normal DMSA scintigraphy (group B). The mean PCT level was significantly higher in group A than in group B (8.81 ng/mL versus 1.7 ng/mL, P = 0.01). In this study, using receiver operating characteristic (ROC) curve, we identified that the optimal cut-off value with ideal sensitivity and specificity for PCT in detection of renal lesions was 0.76 ng/mL and for CRP, it was 70 mg/L. The sensitivity, the negative predictive value and the indice of Youden of the cut-off value of PCT were significantly higher than CRP (82% versus 70%; 84% versus 70% and 0.58 versus 0.25).ConclusionsThis study confirmed that the serum PCT level was more sensitive and specific than the CRP in the detection of renal lesions in the first urinary tract infection in child.     

Utility of two biomarkers for directing care among patients with non-severe community-acquired pneumonia

The aim of the present study is to evaluate the usefulness of two biomarkers—procalcitonin (PCT) and C-reactive protein (CRP)—in addition to the CURB-65 score for assessing the site of care and the etiology of non-severe community-acquired pneumonia (CAP). We conducted a prospective observational study from April 1, 2006, to June 30, 2007, in a single teaching hospital in northern Spain among patients with non-severe CAP. In addition to collecting data needed to determine the CURB-65 score, microbial cultures were taken and levels of PCT and CRP were measured. We compared the prognostic accuracy of these biomarkers with the CURB-65 score to predict hospitalization and microbial etiology using receiver operating characteristic (ROC) curves. A total of 344 patients with non-severe CAP were enrolled; 73 were admitted to the hospital and 271 were treated on an outpatient basis. An etiologic diagnostic was made for 44?%, with atypical pathogens predominating. Levels of PCT and CRP increased with increasing CURB-65 scores. Patients admitted to the hospital had higher PCT and CRP levels than outpatients (p?<?0.001). For predicting hospitalization, PCT had a better area under the ROC curve (AUC) (0.81) than the CURB-65 score alone (0.77). For PCT plus the CURB-65 score, the AUC increased significantly from 0.77 to 0.83. In patients with bacterial CAP, the biomarker levels were significantly higher than among patients with atypical or viral etiology (p?<?0.001). PCT with a cut-off point of 0.15?ng/mL was the best predictor for bacterial etiology and for select patients eligible for outpatient care. In conclusion, levels of PCT and CRP positively correlate with increasing severity of CAP and may have a role in predicting both patients who can safely receive outpatient care and the microbial etiology in patients with low CURB-65 scores.     

降钙素原、C-反应蛋白在鉴别血流感染菌属中的应用价值

目的:探讨降钙素原(PCT)、C-反应蛋白(CRP)在鉴别血流感染不同菌属的临床应用价值,评价PCT 及CRP水平在肠杆菌科、非发酵菌、葡萄球菌属及肠球菌属中的差异。方法:选取2015 年1 月~2017 年1 月中血培养阳性并同时进行PCT、CRP 测定的患者作为研究对象,PCT 及CRP 检测分别采用电化学发光法和免疫比浊法,数据分析采用SPSS21.0 软件,比较不同菌属间PCT 及CRP 水平是否存在差异。采用Sigma 软件,建立ROC 曲线,计算最佳临界值。结果:PCT 水平在革兰阳性菌与革兰阴性菌中差异具有统计学意义,U 值为4 420.00,P 值为0.004,最佳临界值为1.105 ng/ ml;PCT 水平在凝固酶阳性葡萄球菌与凝固酶阴性葡萄球菌中差异具有统计学意义,U 值为79.00,P 值<0.001,最佳临界值为0.870 ng/ ml;PCT水平在肠杆菌科与非发酵菌中差异具有统计学意义,U 值为681.50,P 值为0.005,最佳临界值3.310 ng/ ml;葡萄球菌属与肠球菌属间PCT 水平无统计学意义;CRP 水平在以上各分组中差异均无统计学意义。结论:PCT 在鉴别血流感染不同菌属中有一定价值,可在早期对怀疑菌血症患者合理用药提供依据,与血培养联合检测以降低重症患者的抗感染失败风险,提高治疗效率。     

PCT、Fb和CRP检测在感染性疾病诊断中的应用

目的：探讨降钙素原（PCT）、纤维蛋白原（n）、C反应蛋白（CRP）检测在早期细菌性感染的诊断价值。方法：采用半定量的胶体金免疫结合法检测血清PCT,磁珠凝固法检测血浆Fb,免疫荧光比色法测定全血CRP水平。分别对细菌感染组91例,非细菌感染组108例,非感染组40例（对照组）进行PCT、Fb和CRP的测定。并同时检测白细胞计数和分类。结果：以血清PCT〉10．5ng／ml、Fb〉4．Og／L、CRP〉8．0mg／L为阳性阈值,细菌感染组PCT的阳性率为98．9％、浓度分别为（O．5～〈2．0）、（2．0～〈10）ng／ml、≥10ng／ml三个级别间;Fb的阳性率为93．4％,浓度为（6．19±1．44）g／L;CRP的阳性率为100％,浓度为（150．5±56．6）mg／L。非细菌感染组PCT的阳性率为18．5％,浓度为（0．5-〈2．0）ng／ml;Fb的阳性率为48．1％,浓度为（4．01±1．18）g／L;CRP的阳性率为47．2％,浓度为（48．9±5．61）mg／L。细菌感染组PCT阳性率明显高于非细菌感染组（P〈0．01）;n、CRP水平明显高于非细菌感染组（P〈0．01,P〈0．01）。非细菌感染组Fb、CRP水平明显高于非感染组（2．58±0．32）g／L（P〈0．01）,Cae（14．5±0．3）mg／L（P〈0．01）。结论：PCT、Fb、CRP联检可作为早期细菌性感染的敏感诊断指标,指导临床合理用药和治疗。     

Serum and Pleural Fluid Procalcitonin in Predicting Bacterial Infection in Patients with Parapneumonic Effusion

This study evaluated the value of procalcitonin (PCT) levels in pleural effusion to differentiate the etiology of parapneumonic effusion (PPE). Forty-one consecutive PPE patients were enrolled and were divided into bacterial and non-bacterial PPE. Blood and pleural effusion samples were collected for PCT measurement on admission and analyzed for diagnostic evaluation. PCT of pleural fluid was significantly increased in the bacterial PPE group (0.24 ng/mL) compared to the non-bacterial PPE group (0.09 ng/mL), but there was no significant difference for serum PCT. A PCT concentration of pleural fluid >0.174 ng/mL (best cut-off value) was considered positive for a diagnosis of bacterial PPE (sensitivity, 80%; specificity, 76%; AUC, 0.84). Pleural effusion PCT in the bacterial PPE is significantly different from those of the non-bacterial PPE and control groups, so the diagnostic use of PCT still warrants further investigation.