Natural Orifice Endoscopic Surgery uses native anatomical pathways to reach, treat, and repair target organs. Its clinical goal is to reduce trauma, preserve organs, accelerate recovery, and offer ultra-minimally invasive options for complex digestive diseases.

Professor Jianguo Zhang developed the NOEES framework as a complete surgical logic rather than a single endoscopic maneuver. It includes access planning, instrument coordination, risk control, perioperative management, and standardized training.

For digestive endoscopy, NOEES is meaningful because it turns original clinical experience into a reproducible platform for diseases of the gallbladder, bile duct, pancreas, stomach, intestine, and early digestive tumors.