动态检测降钙素原对食管癌微创术后感染的早期诊断价值

【摘要】 目的 评价动态检测降钙素原对食管癌微创术后感染的早期诊断价值。方法〓选择我院胸外科2015年6月至2016年6月食管癌微创手术患者68例为观察对象(观察组),同期健康体检患者30例为健康组;分别检测实验组术后第1、2、3、5天的静脉血PCT值,其中10例发生感染,归为感染组,余58例为未感染组。比较感染组、未感染组及健康组三组的PCT值。结果〓术后第1天感染组、未感染组PCT较健康组升高(P<0.05),感染组和未感染组无统计学差异;术后第2天感染组较未感染组PCT升高(P<0.05),术后第3天及第5天感染组较未感染组PCT有显著升高(P<0.01),术后前两天未感染组较健康组升高有显著统计学差异(P<0.05),第3及第5天无明显统计学差异。结论〓动态检测降钙素原对食管癌微创术后合并感染有早期诊断价值,术后第2天PCT≥2.06 μg/mL时警示有可能合并细菌感染,可尽早开始针对性地抗感染治疗。     

血清降钙素原在骨折患者术后感染中的诊断价值

目的探讨降钙素原（PCT）、C反应蛋白（CRP）和WBC对骨折患者术后感染的预测价值。方法回顾性分析49例开放性骨折患者的资料,根据术后感染情况分为术后感染组（24例）和无感染组（25例）,分别在第1、4、7和第10天检测患者血液中的PCT、CRP和WBC值,并与健康对照组进行比较。应用受试者工作特征（ROC）的曲线下面积分析各指标对术后感染的诊断价值。结果感染组和无感染组术后第1天PCT、CRP和WBC与健康对照组比较,差异有统计学意义（F值分别为19．84、57．71和35．44,P值均〈0．01）。术后第4、7和第10天,感染组的PCT、CRP和WBC值均高于无感染组,且差异有统计学意义（tPCT值分别为7．31、7．74和4．59,tCRP值分别为2．23、5．75和8．01,tWBC值分别为2．34、2．51和4．07,P值均〈0．05）。ROC曲线分析表明,PCT对开放性骨折术后感染诊断的特异性和敏感性均高于CRP和WBC。结论骨折术后并发感染可引起PCT、CRP和WBC的增高,PCT检测的敏感性和特异性较高,对骨折术后感染的早期诊断更具临床价值。     

肝移植术后血清降钙素原监测的临床意义

Objective To investigate the changes of procalcitonin (PCT) in patients after liver transplantation and explore their significance for diagnosis and differential diagnosis among bacterial infection, viral infection and acute rejection.Methods PCT was measured in serum of 25 liver trans-plant patients by immunofluorescence sandwich method and the patients were divided into the non-complication group, viral infection group, acute rejection group and bacterial infection group.Results The concentrations of PCT in the 1st, 2nd and 3rd day after transplantation were(24.50 ± 4.6)ng/ml, (21.40± 3.3)ng/ml and (12.25 ± 3.1)ng/ml, respectively and they presented a decreasing tendency.The concentrations of PCT in non-complication group, viral infection group and acute rejection group decreased gradually and were near the normal level of (0.51±0.11) ng/ml after 7～10 days.Moreo-ver, the concentrations of PCT in viral infection group and acute rejection group were (0.44 ± 0.16)ng/ml and(0.53±0.14)ng/ml when the patients were in fever.The concentration of PCT in the viral infection group were(15.70±5.1)ng/ml, which was significantly higher than that in other 3 groups (P<0.05) in the early days of fever.The statistical differences among the other three groups were not significant (P>0.05).Conclusion The concentration of PCT in serum is high in the 1st, 2nd and 3rd day then decreased gradually soon.The concentration of PCT is not high in viral infection or acute rejection while significantly high in bacterial infection, so it can be used to differentiate the bacterial infection from acute rejection and virus infection after liver transplantation.     

肝移植术后血清降钙素原监测的临床意义

目的 探讨血清降钙紊原(PCT)浓度在肝移植术后的变化规律以及对细菌感染、病毒感染和排斥反应的诊断与鉴别诊断意义.方法 采用荧光免疫夹心法检测25例肝移植术后病人的血清PCT浓度,并根据术后并发症种类分为无并发症组、病毒感染组、急性排斥反应组和细菌感染组.结果 肝移植术后各组第1～3天的平均PCT浓度分别为(24.50±4.6)ng/ml、(21.40±3.3)ng/ml、(12.25±3.1)ng/ml,呈逐渐下降趋势;肝移植术后无并发症组、病毒感染组和急性排斥反应组的平均PCT浓度在7～10 d后下降至近于正常,并维持在(0.51±0.11)ng/ml;而且病毒感染组和急性排斥反应组,在发热初期以至诊疗结束平均PCT浓度分别为(0.44±0.16)ng/ml、(0.53±0.14)ng/ml,未见升高;而细菌感染组的PCT浓度为(15.70±5.1)ng/ml,在发热初期即明显高于前3组(P<0.05);在无并发症组、病毒感染组、急性排斥反应组之间差异无统计学意义(P>0.05).结论 肝移植术后第1～3天,血清PCT呈现高值,随后逐渐下降,7～10 d后降至近于正常;血清PCT在病毒感染和排斥反应期间不升高,而在细菌感染时显著升高,因此血清PCT监测有助于肝移植术后细菌感染与排斥反应或病毒感染的鉴别诊断.     

肝移植术后血清降钙素原监测的临床意义

Objective To investigate the changes of procalcitonin (PCT) in patients after liver transplantation and explore their significance for diagnosis and differential diagnosis among bacterial infection, viral infection and acute rejection.Methods PCT was measured in serum of 25 liver trans-plant patients by immunofluorescence sandwich method and the patients were divided into the non-complication group, viral infection group, acute rejection group and bacterial infection group.Results The concentrations of PCT in the 1st, 2nd and 3rd day after transplantation were(24.50 ± 4.6)ng/ml, (21.40± 3.3)ng/ml and (12.25 ± 3.1)ng/ml, respectively and they presented a decreasing tendency.The concentrations of PCT in non-complication group, viral infection group and acute rejection group decreased gradually and were near the normal level of (0.51±0.11) ng/ml after 7～10 days.Moreo-ver, the concentrations of PCT in viral infection group and acute rejection group were (0.44 ± 0.16)ng/ml and(0.53±0.14)ng/ml when the patients were in fever.The concentration of PCT in the viral infection group were(15.70±5.1)ng/ml, which was significantly higher than that in other 3 groups (P<0.05) in the early days of fever.The statistical differences among the other three groups were not significant (P>0.05).Conclusion The concentration of PCT in serum is high in the 1st, 2nd and 3rd day then decreased gradually soon.The concentration of PCT is not high in viral infection or acute rejection while significantly high in bacterial infection, so it can be used to differentiate the bacterial infection from acute rejection and virus infection after liver transplantation.     

肝移植术后血清降钙素原监测的临床意义

Objective To investigate the changes of procalcitonin (PCT) in patients after liver transplantation and explore their significance for diagnosis and differential diagnosis among bacterial infection, viral infection and acute rejection.Methods PCT was measured in serum of 25 liver trans-plant patients by immunofluorescence sandwich method and the patients were divided into the non-complication group, viral infection group, acute rejection group and bacterial infection group.Results The concentrations of PCT in the 1st, 2nd and 3rd day after transplantation were(24.50 ± 4.6)ng/ml, (21.40± 3.3)ng/ml and (12.25 ± 3.1)ng/ml, respectively and they presented a decreasing tendency.The concentrations of PCT in non-complication group, viral infection group and acute rejection group decreased gradually and were near the normal level of (0.51±0.11) ng/ml after 7～10 days.Moreo-ver, the concentrations of PCT in viral infection group and acute rejection group were (0.44 ± 0.16)ng/ml and(0.53±0.14)ng/ml when the patients were in fever.The concentration of PCT in the viral infection group were(15.70±5.1)ng/ml, which was significantly higher than that in other 3 groups (P<0.05) in the early days of fever.The statistical differences among the other three groups were not significant (P>0.05).Conclusion The concentration of PCT in serum is high in the 1st, 2nd and 3rd day then decreased gradually soon.The concentration of PCT is not high in viral infection or acute rejection while significantly high in bacterial infection, so it can be used to differentiate the bacterial infection from acute rejection and virus infection after liver transplantation.     

肝移植术后血清降钙素原监测的临床意义

Objective To investigate the changes of procalcitonin (PCT) in patients after liver transplantation and explore their significance for diagnosis and differential diagnosis among bacterial infection, viral infection and acute rejection.Methods PCT was measured in serum of 25 liver trans-plant patients by immunofluorescence sandwich method and the patients were divided into the non-complication group, viral infection group, acute rejection group and bacterial infection group.Results The concentrations of PCT in the 1st, 2nd and 3rd day after transplantation were(24.50 ± 4.6)ng/ml, (21.40± 3.3)ng/ml and (12.25 ± 3.1)ng/ml, respectively and they presented a decreasing tendency.The concentrations of PCT in non-complication group, viral infection group and acute rejection group decreased gradually and were near the normal level of (0.51±0.11) ng/ml after 7～10 days.Moreo-ver, the concentrations of PCT in viral infection group and acute rejection group were (0.44 ± 0.16)ng/ml and(0.53±0.14)ng/ml when the patients were in fever.The concentration of PCT in the viral infection group were(15.70±5.1)ng/ml, which was significantly higher than that in other 3 groups (P<0.05) in the early days of fever.The statistical differences among the other three groups were not significant (P>0.05).Conclusion The concentration of PCT in serum is high in the 1st, 2nd and 3rd day then decreased gradually soon.The concentration of PCT is not high in viral infection or acute rejection while significantly high in bacterial infection, so it can be used to differentiate the bacterial infection from acute rejection and virus infection after liver transplantation.     

肝移植术后血清降钙素原监测的临床意义

Objective To investigate the changes of procalcitonin (PCT) in patients after liver transplantation and explore their significance for diagnosis and differential diagnosis among bacterial infection, viral infection and acute rejection.Methods PCT was measured in serum of 25 liver trans-plant patients by immunofluorescence sandwich method and the patients were divided into the non-complication group, viral infection group, acute rejection group and bacterial infection group.Results The concentrations of PCT in the 1st, 2nd and 3rd day after transplantation were(24.50 ± 4.6)ng/ml, (21.40± 3.3)ng/ml and (12.25 ± 3.1)ng/ml, respectively and they presented a decreasing tendency.The concentrations of PCT in non-complication group, viral infection group and acute rejection group decreased gradually and were near the normal level of (0.51±0.11) ng/ml after 7～10 days.Moreo-ver, the concentrations of PCT in viral infection group and acute rejection group were (0.44 ± 0.16)ng/ml and(0.53±0.14)ng/ml when the patients were in fever.The concentration of PCT in the viral infection group were(15.70±5.1)ng/ml, which was significantly higher than that in other 3 groups (P<0.05) in the early days of fever.The statistical differences among the other three groups were not significant (P>0.05).Conclusion The concentration of PCT in serum is high in the 1st, 2nd and 3rd day then decreased gradually soon.The concentration of PCT is not high in viral infection or acute rejection while significantly high in bacterial infection, so it can be used to differentiate the bacterial infection from acute rejection and virus infection after liver transplantation.     

肝移植术后血清降钙素原监测的临床意义

Objective To investigate the changes of procalcitonin (PCT) in patients after liver transplantation and explore their significance for diagnosis and differential diagnosis among bacterial infection, viral infection and acute rejection.Methods PCT was measured in serum of 25 liver trans-plant patients by immunofluorescence sandwich method and the patients were divided into the non-complication group, viral infection group, acute rejection group and bacterial infection group.Results The concentrations of PCT in the 1st, 2nd and 3rd day after transplantation were(24.50 ± 4.6)ng/ml, (21.40± 3.3)ng/ml and (12.25 ± 3.1)ng/ml, respectively and they presented a decreasing tendency.The concentrations of PCT in non-complication group, viral infection group and acute rejection group decreased gradually and were near the normal level of (0.51±0.11) ng/ml after 7～10 days.Moreo-ver, the concentrations of PCT in viral infection group and acute rejection group were (0.44 ± 0.16)ng/ml and(0.53±0.14)ng/ml when the patients were in fever.The concentration of PCT in the viral infection group were(15.70±5.1)ng/ml, which was significantly higher than that in other 3 groups (P<0.05) in the early days of fever.The statistical differences among the other three groups were not significant (P>0.05).Conclusion The concentration of PCT in serum is high in the 1st, 2nd and 3rd day then decreased gradually soon.The concentration of PCT is not high in viral infection or acute rejection while significantly high in bacterial infection, so it can be used to differentiate the bacterial infection from acute rejection and virus infection after liver transplantation.     

肝移植术后血清降钙素原监测的临床意义

Objective To investigate the changes of procalcitonin (PCT) in patients after liver transplantation and explore their significance for diagnosis and differential diagnosis among bacterial infection, viral infection and acute rejection.Methods PCT was measured in serum of 25 liver trans-plant patients by immunofluorescence sandwich method and the patients were divided into the non-complication group, viral infection group, acute rejection group and bacterial infection group.Results The concentrations of PCT in the 1st, 2nd and 3rd day after transplantation were(24.50 ± 4.6)ng/ml, (21.40± 3.3)ng/ml and (12.25 ± 3.1)ng/ml, respectively and they presented a decreasing tendency.The concentrations of PCT in non-complication group, viral infection group and acute rejection group decreased gradually and were near the normal level of (0.51±0.11) ng/ml after 7～10 days.Moreo-ver, the concentrations of PCT in viral infection group and acute rejection group were (0.44 ± 0.16)ng/ml and(0.53±0.14)ng/ml when the patients were in fever.The concentration of PCT in the viral infection group were(15.70±5.1)ng/ml, which was significantly higher than that in other 3 groups (P<0.05) in the early days of fever.The statistical differences among the other three groups were not significant (P>0.05).Conclusion The concentration of PCT in serum is high in the 1st, 2nd and 3rd day then decreased gradually soon.The concentration of PCT is not high in viral infection or acute rejection while significantly high in bacterial infection, so it can be used to differentiate the bacterial infection from acute rejection and virus infection after liver transplantation.     

肝移植术后血清降钙素原监测的临床意义

Objective To investigate the changes of procalcitonin (PCT) in patients after liver transplantation and explore their significance for diagnosis and differential diagnosis among bacterial infection, viral infection and acute rejection.Methods PCT was measured in serum of 25 liver trans-plant patients by immunofluorescence sandwich method and the patients were divided into the non-complication group, viral infection group, acute rejection group and bacterial infection group.Results The concentrations of PCT in the 1st, 2nd and 3rd day after transplantation were(24.50 ± 4.6)ng/ml, (21.40± 3.3)ng/ml and (12.25 ± 3.1)ng/ml, respectively and they presented a decreasing tendency.The concentrations of PCT in non-complication group, viral infection group and acute rejection group decreased gradually and were near the normal level of (0.51±0.11) ng/ml after 7～10 days.Moreo-ver, the concentrations of PCT in viral infection group and acute rejection group were (0.44 ± 0.16)ng/ml and(0.53±0.14)ng/ml when the patients were in fever.The concentration of PCT in the viral infection group were(15.70±5.1)ng/ml, which was significantly higher than that in other 3 groups (P<0.05) in the early days of fever.The statistical differences among the other three groups were not significant (P>0.05).Conclusion The concentration of PCT in serum is high in the 1st, 2nd and 3rd day then decreased gradually soon.The concentration of PCT is not high in viral infection or acute rejection while significantly high in bacterial infection, so it can be used to differentiate the bacterial infection from acute rejection and virus infection after liver transplantation.     

肝移植术后血清降钙素原监测的临床意义

Objective To investigate the changes of procalcitonin (PCT) in patients after liver transplantation and explore their significance for diagnosis and differential diagnosis among bacterial infection, viral infection and acute rejection.Methods PCT was measured in serum of 25 liver trans-plant patients by immunofluorescence sandwich method and the patients were divided into the non-complication group, viral infection group, acute rejection group and bacterial infection group.Results The concentrations of PCT in the 1st, 2nd and 3rd day after transplantation were(24.50 ± 4.6)ng/ml, (21.40± 3.3)ng/ml and (12.25 ± 3.1)ng/ml, respectively and they presented a decreasing tendency.The concentrations of PCT in non-complication group, viral infection group and acute rejection group decreased gradually and were near the normal level of (0.51±0.11) ng/ml after 7～10 days.Moreo-ver, the concentrations of PCT in viral infection group and acute rejection group were (0.44 ± 0.16)ng/ml and(0.53±0.14)ng/ml when the patients were in fever.The concentration of PCT in the viral infection group were(15.70±5.1)ng/ml, which was significantly higher than that in other 3 groups (P<0.05) in the early days of fever.The statistical differences among the other three groups were not significant (P>0.05).Conclusion The concentration of PCT in serum is high in the 1st, 2nd and 3rd day then decreased gradually soon.The concentration of PCT is not high in viral infection or acute rejection while significantly high in bacterial infection, so it can be used to differentiate the bacterial infection from acute rejection and virus infection after liver transplantation.     

肝移植术后血清降钙素原监测的临床意义

Objective To investigate the changes of procalcitonin (PCT) in patients after liver transplantation and explore their significance for diagnosis and differential diagnosis among bacterial infection, viral infection and acute rejection.Methods PCT was measured in serum of 25 liver trans-plant patients by immunofluorescence sandwich method and the patients were divided into the non-complication group, viral infection group, acute rejection group and bacterial infection group.Results The concentrations of PCT in the 1st, 2nd and 3rd day after transplantation were(24.50 ± 4.6)ng/ml, (21.40± 3.3)ng/ml and (12.25 ± 3.1)ng/ml, respectively and they presented a decreasing tendency.The concentrations of PCT in non-complication group, viral infection group and acute rejection group decreased gradually and were near the normal level of (0.51±0.11) ng/ml after 7～10 days.Moreo-ver, the concentrations of PCT in viral infection group and acute rejection group were (0.44 ± 0.16)ng/ml and(0.53±0.14)ng/ml when the patients were in fever.The concentration of PCT in the viral infection group were(15.70±5.1)ng/ml, which was significantly higher than that in other 3 groups (P<0.05) in the early days of fever.The statistical differences among the other three groups were not significant (P>0.05).Conclusion The concentration of PCT in serum is high in the 1st, 2nd and 3rd day then decreased gradually soon.The concentration of PCT is not high in viral infection or acute rejection while significantly high in bacterial infection, so it can be used to differentiate the bacterial infection from acute rejection and virus infection after liver transplantation.     

血清降钙素原检测对于肾移植术后肺部感染的诊断价值

目的：与内毒素和C反应蛋白（ CRP）检测结果进行比较,探讨血清降钙素原（ PCT）检测在肾移植术后肺部感染诊断中的临床意义及其应用价值。方法回顾性分析2010年2月至2013年9月武汉大学移植医学中心98例肾移植术后并发肺部感染的受者临床资料。根据肺部感染的病原体诊断标准将受者分为细菌组（48例）和非细菌组（50例）,比较PCT、内毒素和CRP检测3种方法诊断肾移植术后细菌性肺部感染的灵敏度和特异度,比较3种方法对确诊肾移植术后并发细菌性肺部感染受者的阳性诊断结果。结果 PCT 检测灵敏度为95.8％,特异度为94．0％;内毒素检测灵敏度为77．1％,特异度为72．0％;CRP检测灵敏度为52．1％,特异度为58．0％。血清PCT检测细菌组受者阳性结果高于内毒素和CRP检测（χ2＝7.36,10．04, P均＜0．05）。结论血清PCT检测对于肾移植术后细菌性肺部感染的临床诊断价值高于内毒素和CRP,可作为肾移植受者是否并发细菌性肺部感染的优选诊断指标。     

血清降钙素原检测对成人脾切除术后感染的诊断价值

目的探讨血清降钙素原检测对成人脾切除术后感染性并发症的诊断价值。方法选取2015-01—2017-08间在西平县人民医院接受脾切除术的96例成人患者,术后第2、4、6天均分别检测血清降钙素原。其中11例(10.42%)术后发生感染性并发症。回顾性分析患者的临床资料,探讨血清降钙素原检测对脾切除术后感染性并发症的诊断价值。结果术后发生感染性并发症患者术后第2、4、6天血清降钙素原的水平持续升高,未发生感染性并发症患者的血清降钙素原的水平持续下降,2组差异有统计学意义(P0.05)。结论血清降钙素原的水平与脾切除术后感染性并发症有一定的相关性。连续检测血清降钙素原水平,对诊断成人脾切除术后感染性并发症有重要临床价值。     

血清降钙素原在重症病人感染早期诊断中的意义

目的:评价半定量测定血清降钙素原(PCT)对重症病人感染的早期诊断及其与疾病严重程度的相关性.方法:取121例体温>380C、符合全身炎症反应综合征临床表现并疑似感染的ICU重症病人人选,测定其血清PCT、C反应蛋白(CRP)、白细胞计数及分类,同时记录APACHEⅡ评分及全身性感染相关器官衰竭评分(SOFA).用半定量免疫色谱法测定血清PCT,散射免疫比浊法测定血清CRP.结果:121例入选病人按临床表现和细菌学检测结果分为感染组和非感染组.感染组的APACHEⅡ和SOFA评分明显高于非感染组(P<0.05).两组的血清PCT分布有显著性差异(x2=46.736,P=0.000),参照受试者工作特征曲线,以血清PCT≥2 ng/mL为阳性标准诊断感染的敏感度(80.65%)、特异性(77.78%)、阴性预测值(92.11%)及准确度(78.51%)均高于以CRP和WBC为诊断标准者.血清PeT与APACHEⅡ、SOFA评分呈明显正相关关系(P<0.01).结论:与CRP、WBC等传统炎症指标相比,血清PeT在重症病人严重感染的早期诊断中有一定诊断价值;且动态监测PCT水平有助于评估治疗效果.PCT与严重感染的脏器功能障碍程度及疾病的严重程度相关,是评估感染严重程度的较好参数.     

血清降钙素原对败血症早期诊断的临床应用

目的探讨检测血清降钙素原对早期败血症诊断的临床意义。方法对50例败血症患者(观察组)和50例非败血症患者(对照组)均检测血清降钙素原,比较检查结果。结果观察组的血清降钙素原平均含量(3.76±1.54)ng/ml,明显高于对照组患者水平(0.85±0.32)ng/ml,两组比较差异有统计学意义(P0.05)。结论败血症患者血清降钙素原含量高于非败血症患者,提示此项指标对细菌性感染较为敏感。     

降钙素原对急性Stanford A型主动脉夹层患者术后感染的诊断价值

目的 探讨降钙素原(PCT)对急性Stanford A型主动脉夹层患者术后感染的诊断价值.方法 回顾性分析2017年6月至2019年12月中国医学科学院阜外医院深圳医院收治的急性Stanford A型主动脉夹层接受外科手术治疗的患者104例,男88例,女16例,年龄≥18岁.根据术后是否发生感染将患者分为两组:感染组(...     

血清降钙素原检测对慢性重型乙型肝炎并发细菌感染的早期诊断价值

细菌感染是慢性重型乙型肝炎患者的常见并发症,也是导致患者病情加重和死亡的重要原因.慢性重型肝炎患者住院期间并发细菌感染的发生率为60％ ～ 70％,腹腔感染占首位,其次是肺部[1].研究显示,重型肝炎并发细菌感染患者的病死率明显高于非细菌感染患者[2].因此,如何早期发现并控制感染对改善重型肝炎的预后有重要的意义.降钙素原(PCT)近年来被认为是一种机体对细菌感染的全身炎症反应的特异性指标[3].血清PCT浓度的升高不仅可以判断是否存在全身细菌感染,而且可以反映感染的严重程度[4].本研究对慢性重型乙型肝炎并发细菌感染的患者进行血清PCT、C-反应蛋白(CRP)水平检测,探讨血清PCT检测对慢性重型乙型肝炎并发细菌感染的早期诊断价值.     

降钙素原对脑挫裂伤并发肺部感染早期诊断的临床意义

目的：探讨降钙素原（Procalcitonin,PCT）对脑挫裂伤并发肺炎早期诊断的意义。方法60例急性脑挫裂伤患者因神志不清或监护条件受限入ICU,分为合并肺部感染组和非肺部感染组。患者在入院当天、入院后第3天和第7天抽血检测 PCT和 C反应蛋白并经痰培养、影像学等检查,采用GCS评估患者病情。随访1月以评估预后。结果 PCT 在肺部感染组特别是痰培养阳性患者异常增高,浓度大于0.5 ng/ml,脑挫裂伤并发肺部感染患者,其特异性为92.5%,其阳性预测值达到83.2%,均较CRP高。 GCS评分低于7,其 PCT 明显升高,CRP有增高倾向,但各组间统计学上无差异。PCT 的数值与预后相关,存活组低于死亡组。结论 PCT可以作为评估脑挫裂伤并发肺部感染的的早期指标,还可以反应病情程度。