Manual compression proximal and distal to a selected segment allow insufflation. The lesion is visualized both by the endoscopist and by transillumination. (Reprinted with permission from Scott Conner CEH, Dawson DL. Operative Anatomy. Philadelphia: Lipp
Rotating wheels on the headpiece of the endoscope control tip deflection. Instruments may be passed through an access port, which is kept capped when not in use (to prevent loss of insufflation and splashing of fluids).
Completed bypass. The bypass is tested by insufflation of air under saline, or by instillation of methylene blue. (Soper NJ, Swanstrom LL, Eubanks WS, eds. Mastery of Endoscopic and Laparoscopic Surgery. 2d ed. Philadelphia: Lippincott Williams &amp;