The rectum lies fixed on the pelvic bone and is, therefore, modelled as a fixed part of the sigmoid colon. If this happens, the tip applies push forces on the colon wall with its frontal surface; hence, a reaction force acts against that surface and the scope shaft is pushed against from two sides. Thus, during scope advancement, the magnitude of q push-1 increases Figure 2B. Start symptom checker. Anatomy portal.
What is colorectal cancer?
When we searched the Korean medical database, we found only two papers [ 1 , 2 ]. Overall, many suggestions for better colonoscopy devices have been proposed, but none appear to be sufficiently developed to offer a complete solution. Anatomical terminology [ edit on Wikidata ].