Kosloske A M
Department of Surgery, Ohio State University College of Medicine, Columbus.
Acta Paediatr Suppl. 1994;396(Suppl 396):2-7. doi: 10.1111/j.1651-2227.1994.tb13232.x.
Necrotizing enterocolitis (NEC) is a worldwide problem that has emerged in the past 25 years as the most common gastrointestinal emergency in neonatal intensive care units (NICU). In the United States the incidence ranges from 1 to 7.7% of NICU admissions. Ninety percent of the patients are premature infants. Mucosal injury, bacterial colonization and formula feeding are the three major pathogenetic factors that have been documented in most infants who have developed NEC. However, NEC may develop only if a threshold of injury, imposed by the coincidence of at least two of three events (intestinal ischemia, pathogenic bacteria, and excess of protein substrate) is exceeded. Immunological immaturity of the gut in premature babies may represent the crucial risk factor.
坏死性小肠结肠炎(NEC)是一个全球性问题,在过去25年中已成为新生儿重症监护病房(NICU)中最常见的胃肠道急症。在美国,NICU入院患者中NEC的发病率为1%至7.7%。90%的患者为早产儿。黏膜损伤、细菌定植和配方奶喂养是大多数发生NEC的婴儿中已被记录的三个主要致病因素。然而,只有当由三个事件(肠道缺血、病原菌和蛋白质底物过量)中至少两个事件同时发生所导致的损伤阈值被超过时,才可能发生NEC。早产儿肠道的免疫不成熟可能是关键的危险因素。