患儿，男，26小时，主因便血伴呕吐8小时入院。患儿系G1P1，孕40周剖宫产，无窒息，生后3～4小时排胎便，患儿于生后18小时排粘液血便，量不多，并拌呕吐，呕吐物初为无色粘液，后为黄绿色液体，非喷射性，量不多，外院考虑“新生儿出血症”。发病以来无抽搐及尖叫等，体温正常 Children, male, 26 hours, mainly due to blood in the stool with vomiting 8 hours admission. Childhood Department of G1P1, 40 weeks of pregnancy, cesarean section, no asphyxia, 3 to 4 hours after birth row of childbirth, children in 18 hours after childbirth mucus bloody stools, the amount of small, and mixed vomit, vomit initially colorless mucus , After the yellow-green liquid, non-jet, a small amount, outside the hospital to consider “neonatal hemorrhagic disease.” Since the onset of no convulsions and screaming, body temperature is normal