降钙素原(procalcitonin,PCT)是近年研究较多的感染相关性生物标记物,大量的研究资料表明,其与感染所致的炎症反应综合征(systemicinflammatory response syndrome,SIRS)、脓毒症、脓毒性休克等全身感染情况的严重程度和预后具有明确的相关性。在国外,PCT作为常规检测指标已被广泛应用于临床,现就PCT的生成、代谢、测定方 Procalcitonin (PCT) is an infectious biomarker that has been studied more and more in recent years. A large amount of research data indicate that it is associated with systemic inflammatory response syndrome (SIRS), sepsis, The severity and prognosis of systemic infections such as septic shock have a clear correlation. In foreign countries, PCT has been widely used in clinic as a routine test index, and on the PCT generation, metabolism, determination of side