 Enteroscopy, including double balloon enteroscopy DBE, single balloon enteroscopy SBE and spiral enteroscopy SE currently, have shown good performances in small bowel diagnostics and seem to be useful in the clinical routine. However, enteroscopy is a time-consuming procedure. During common practice, large volumes of air need to be insufflated for good visualization. It leads to significant distention of the small bowel during the examination, which makes further intubation more technically challenging because of the formation of distended bowel loops and acute angulations and limits the maximal intubation length. According to the published data, the oral insertion depth of different kinds of enteroscopy is limited to approximately 240 cm. The total examination rate range form 18 to 86 for DBE and 0 to 11 for SBE. 