目的 探讨血清降钙素原（PCT）、C反应蛋白（CRP）与急性生理及慢性健康评分标准Ⅱ（APACHE Ⅱ）评分在转诊肺炎合并脓毒症患者诊断中的相关性，以寻找更为简洁、快速判断其病情严重程度的指标。 方法 2009年1月－2010年12月，选取178例转诊肺炎合并脓毒症患者并进行脓毒症分级，对其进行血清PCT和CRP测定，并与APACHE Ⅱ评分及预后进行相关性分析。 结果 严重脓毒症组及脓毒性休克组患者血清PCT、CRP水平与APACHE Ⅱ评分较全身炎症反应综合征组及脓毒症组高（P＜0.05）；30 d内死亡的患者其血清PCT、CRP水平及APACHEⅡ评分较存活组明显增高（P＜0.05）；转诊肺炎合并脓毒症患者血清PCT与APACHE Ⅱ评分呈正相关（r=0.683，P=0.023），与血清CRP水平呈较弱的正相关（r=0.272，P=0.037）。 结论 对转院肺炎合并脓毒症患者进行血清PCT和CRP测定，对病情评估具有一定临床价值，特别是PCT可作为对转诊肺炎合并脓毒症患者病情程度判断的重要指标，为早期干预及治疗提供依据，值得临床推广应用。
ObjectiveTo explore procalcitonin (PCT) dynamically in severe community-acquired pneumonia (SCAP) patients to evaluate the effects of different kinds of medical treatments and assess the clinical significance of the change of PCT. MethodsAll of the selected 60 SCAP patients treated from January 2009 to April 2011 met the standards of IDSA/ATS Guidelines for CAP. There were 38 males and 22 females, with an average age of 66.3 years. The sterile venous blood specimen samples were collected from the patients at day 0 to day 5. PCT and C-reactive protein (CRP) were measured by enzyme linked immunosorbent assay throughout the research. At day six, based on oxygenation index (PaO2/FiO2) ratio higher than 250, inflammation absorption on chest X ray after vasoactive agents were stopped, Glasgow scores higher than 10 and urine volume equal to or higher than 0.5 mL/(kg·d), we divided the patients into recovery group and deterioration group. Data were analyzed by SAS 9.0 software, and P<0.05 was considered to be statistically significant. ResultsThe analysis results showed that PCT and CRP bore a significantly positive relationship on day 0 (r=0.38, P=0.00). The research also indicated that PCT had a faster declining rate than CRP and white blood cells count throughout the clinical treatment. The average of PCT declined 29% in 48 hours. Following the criterion of PCT decrease by 30%, the research showed that PCT had a higher sensibility and specificity (66.87% and 85.50%, respectively) in 48 hours than 72 hours (70.05% and 100.00%), 96 hours (79.88% and 75.23%), and 120 hours (83.10% and 100.00%). ConclusionFollowing the criterion of PCT decrease by 30% after using antibiotics can be an clinical objective index to guide the use of antibiotics and provide the basis for clinical application and prognosis.