Department of Colorectal and Anal Surgery of Zhongnan Hospital of Wuhan University;
Key Laboratory of Intestinal and Colorectal Diseases of Hubei Province;
Quality Control Center of Colorectal and Anal Surgery of Health and Family Planning Commission of Hubei Province;
Clinical Center of Intestinal and Colorectal Diseases of Hubei Province;
Obstructive defecation syndrome; Transanal surgery; Transanal manual technique; Transanal stapling procedure; Medical assessment; Clinical outcome; Clinical experience;