Gallagher E A, Clarke E, Connor M, Shanahan I, Smyth M R, Lennon J R, Crowe J
Department of Gastroenterology, Mater Hospital, Dublin.
Ir J Med Sci. 1992 Oct;161(10):582-5. doi: 10.1007/BF02942362.
Gas samples were obtained during colonoscopy for analysis. Patients were prepared with polyethylene glycol (PEG) (N = 23), phosphate enema (N = 34) and mannitol (N = 4). Air insufflation was used in all procedures. High concentrations of hydrogen were detected in 3 out of 38 gas samples in the PEG group, in 2 of 41 samples in the phosphate enema group and in one of the 8 samples in the mannitol group. All patients had a coexisting intracolonic oxygen concentration > 5%. The results suggest that potentially explosive concentrations of hydrogen may occur after conventional bowel preparations, and that insufflation of carbon dioxide during polypectomy should be a routine.
在结肠镜检查期间采集气体样本进行分析。患者分别采用聚乙二醇（PEG）（N = 23）、磷酸灌肠剂（N = 34）和甘露醇（N = 4）进行肠道准备。所有操作均使用空气注入。PEG组38个气体样本中有3个检测到高浓度氢气，磷酸灌肠剂组41个样本中有2个，甘露醇组8个样本中有1个。所有患者结肠内共存氧浓度均> 5%。结果表明，常规肠道准备后可能会出现具有潜在爆炸性浓度的氢气，并且在息肉切除术中注入二氧化碳应成为常规操作。
