The Yin-Yang theory holds that disease is a result of an imbalance between yin and yang which leads to the hyperactivity or hypoactivity of yin and yang. The occurrence and the development of a disease are also related to zheng qi (body resistance or antipathogenic factors) and xie qi (pathogenic factors). The Yin-Yang theory can be used to generalize the interacting relations between body resistance and antipathogenic factors.
1 Colposcopy is a procedure used by physicians that provides a magnified and illuminated view of the vulva, vaginal walls, and uterine cervix. 2  This procedure is often done to evaluate an abnormal appearing cervix or an abnormal Pap smear result.
A sigmoidoscopy is a minimally invasive procedure in which a slim tube with a camera is inserted into the rectum to examine the last part of the colon called the âsigmoid colonâ. A colonoscopy is a similar procedure to sigmoidoscopy but involves an examination of all of the colon and rectum.oth procedures are performed to detect signs of cancer or conditions such as Crohnâsdisease or ulcerative colitis. A colorectal surgeon carries out a wide range of surgeries which include: 1  Removing pre-cancerous polyps from the colon. 2  Treatment of colon cancer. 3  Colostomy.