Do colonoscopy to be able to check small intestine?

If the small intestine can be examined by enteroscopy, it is

difficult to observe the small intestine directly due to its long and deep position. If double-balloon enteroscopy is used, it is necessary to inject gas and water into the intestine to expand the small intestine so that the doctor can carry out endoscopic examination. At this time, it is possible to examine the small intestine

.