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目的探讨血小板水平与危重症患者预后的关系。方法选择危重症患者157例，按急性生理学与慢性健康状况Ⅱ( acute physiology and chronic health evaluationⅡ, APACHEⅡ)评分结果将入选患者分为三组：院A组(APACHEⅡ评分20分)，根据患者的预后分为存活组和死亡组。进行APACHEⅡ评分及序贯器官衰竭估计（Sequential organ failure as es ment，SOFA）评分，血小板计数做专门记录。结果 A组与B组、C组比较，前者血小板计数较后两组高，SOFA评分低，病死率低，均有统计学差异，B组与C组比较，前者较后者血小板计数高，SOFA评分低，病死率低，有统计学差异；存活组与死亡组比较,APACHEⅡ评分与血小板计数有显著性差异。结论血小板水平监测对评估危重病患者的病情预后具有一定的临床意义。“,”Objective To investigate the relationship between the platelet level and the prognosis of patients with critical y il . Methods 157 critical y il patients were divided into three groups based on acute physiology and chronic Health Evaluation(APACHE)II, that were A group (APACHE score20) . Patients were divided into two groups according to survival or death according to prognosis. APACHEIIscor and Sequential outraged failure assessment score were measured, and record the platelet counts. Results Group A compared with group B, group C, higher ranges are found in the former than the lat er,SOFA score and the case fatality rate are significantly lower. Group B compared with group C, higher ranges are found in the former than the lat er ,SOFA score and the case fatality rate are significantly lower. Survival group compared with death group, APACHE II score and the platelet count have significant dif erence .Conclusion Platelet levels to assess the condition of critical care patients prognosis has certain clinical significance.