便血可能预示疾病更严重,症状时间更长,以及有黏膜水肿/溃疡(根据定义)。也可能提示肠套叠套入部已向远端延伸。
直肠出血可能为隐性或显性;如果直肠出血含有血液和黏液混合物,可描述为红果酱样。[2]Hackam DJ, Newman K, Ford HR. Pediatric surgery: gastrointestinal tract. In: Schwartz's principles of surgery, 8th ed. New York, NY: McGraw-Hill; 2005:1493-1494.见于 35%-73% 病例。[5]Justice FA, Auldist AW, Bines JE. Intussusception: trends in clinical presentation and management. J Gastroenterol Hepatol. 2006;21:842-846.http://www.ncbi.nlm.nih.gov/pubmed/16704533?tool=bestpractice.com[9]O'Ryan M, Lucero Y, Pena A, et al. Two year review of intestinal intussusception in six large hospitals of Santiago, Chile. Pediatr Infect Dis J. 2003;22:717-721.http://www.ncbi.nlm.nih.gov/pubmed/12913773?tool=bestpractice.com[12]Blanch AJ, Perel SB, Acworth JP. Paediatric intussusception: epidemiology and outcome. Emerg Med Australas. 2007;19:45-50.http://www.ncbi.nlm.nih.gov/pubmed/17305660?tool=bestpractice.com