Crit Care:病原体和感染病灶对败血症患者细菌性血症或念珠菌血症患者的降钙素值的影响

2020-05-31 MedSci原创 MedSci原创

本研究旨在评价丙种球蛋白(PCT)血清浓度诊断革兰氏阴性菌血症的准确性,以及PCT血清浓度与更多特异性病原体和感染病灶的相关性。

本研究旨在评价丙种球蛋白(PCT)血清浓度诊断革兰氏阴性菌血症的准确性,以及PCT血清浓度与更多特异性病原体和感染病灶的相关性。

 

对一项群集随机质量改善试验中的前瞻性收集的患者水平数据集进行了二次分析。该试验纳入了2011年至2015年期间在参与试验的重症监护室接受治疗的器官功能障碍的败血症患者。通过接收机操作曲线分析评估了预测革兰氏阴性菌血症的试验性能。通过线性logistic回归模型评估了特定病原体组和感染灶对PCT浓度的独立影响。

 

在6561例记录的患者中的4858例中进行了血液培养(BC)和PCT浓度检测。结果显示,与革兰氏阴性菌血症或念珠菌血症相比,PCT显著高于革兰氏阳性菌血症或念珠菌血症(P <0.001)。与所有其他血培养结果(包括阴性血培养)相比,预测革兰氏阴性菌血症的曲线下面积为0.72(95%置信区间为0.71-0.74)。优化的截断值为10 ng/ml(灵敏度69%,特异性35%)。PCT在特定的病原体组之间存在显著差异(P <0.001),其中大肠杆菌、链球菌和其他肠杆菌科的浓度最高。PCT在泌尿生殖道感染中最高,其次是腹部感染,呼吸道感染中最低(p <0.001)。在线性回归模型中,从BC中检测到的链球菌、大肠杆菌和其他肠杆菌属与PCT值的3倍以上有关。泌尿生殖器或腹部感染灶与PCT值增加2倍相关,与病原体无关。

 

综上所述,该研究结果表明,革兰氏阴性菌血症患者的血清PCT浓度高于革兰氏阳性菌血症或念珠菌血症患者。然而,这种差异的鉴别力太低,无法指导治疗决策。PCT血清浓度的差异并不完全由革兰氏阴性菌或革兰氏阳性菌决定,还受不同的病原体群体和不同的感染灶的影响。

 

原始出处:

 

Daniel O Thomas-Rüddel, Bernhard Poidinger, et al., Influence of Pathogen and Focus of Infection on Procalcitonin Values in Sepsis Patients With Bacteremia or Candidemia. Crit Care. 2018 May 13;22(1):128. doi: 10.1186/s13054-018-2050-9.

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    2020-06-02 xue8605
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    2020-06-02 xugc

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