短链脂肪酸(SCFAs)是有机阴离子,由结肠内的碳水化合物经厌氧菌发酵所形成,因此是结肠特有的内容物,而回肠缺少SCFAs。若回肠内存有高浓度的SCFAs,说明伴有结回肠返流。作者前曾提出,从结肠返流的SCFAs 刺激回肠的化学感受器,从而引起回肠前推运动。SCFAs 可能是结回肠返流的化学信号,其在回肠内的作用方式与食管内的HCl 相似。SCFAs 能引起狗回肠的延续性传播性收缩(PPCs)或稀疏集束收缩(DCCs)或两者兼之。 Short chain fatty acids (SCFAs) are organic anions formed by the fermentation of anaerobic bacteria in the colon by carbohydrates and are therefore colon specific, whereas the ileum lacks SCFAs. If the ileum memory of high concentrations of SCFAs, indicating that accompanied by ileal reflux. The authors have previously suggested that SCFAs that return from the colon stimulate the ileal chemoreceptors, resulting in ileal propulsive motility. SCFAs may be a chemical signal for junction-ileal reflux that acts in the ileum in a similar manner to HCl in the esophagus. SCFAs can cause continuous transmission contractions (PPCs) or sparse systolic (DCCs) or both in the ileum of dogs.