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血病原体培养是一项简单的技术,但对败血症来说,则具有从病原学方面确定诊断的重要性。由于这一方法的整个操作过程受到多种因索的影响,所以可能出现假阳性的现象。MacGregor曾分析了857例病人的1,707份血培养的结果,其中322份标本有细菌生长,这857例中有233例至少1次阳性,因此受血培养的病人的阳性率为27.2%。但经临床资料分析证明,这322份阳性培养中有152份为污染所致,假阳性率几乎达50%。因此,如何从血培养阳性中及早区分出污染结果及其来源,对临床工作将具有指导意义。
Blood pathogen culture is a simple technique, but for sepsis it has the etiological importance of diagnosing it. Since the entire operation of this method is affected by many factors, false positives may occur. MacGregor analyzed the results of 1,707 blood cultures in 857 patients, 322 of whom had bacterial growth. Of the 857 patients, 233 were positive at least once, and the positive rate was 27.2% in blood-cultured patients. However, clinical data analysis shows that 152 of 322 positive cultures were contaminated, with a false-positive rate of almost 50%. Therefore, how to differentiate the pollution results and their sources early from the positive blood culture will be instructive for clinical work.