A 52-year-old female patient with colon cancer underwent anus-preserving surgery with nickel-titanium pressure anastomosis ring (CAR) technology at a cancer hospital. After 10 days of rehabilitation, on November 22, her car smoothly fell off her body and was discharged from the body. This marks the success of the world's latest anastomosis technology in clinical applications. According to the Chinese and English full-text search, there is currently only one clinical report on the above-mentioned surgery in the world. This is also the first time that Ni-Ti alloy anastomosis ring technology has been applied to such operations in Asia.

Surgery was performed by Professor Cai Sanjun, who led Dr. Li Xinxiang and Professor Xu Ye.

According to reports, colorectal cancer is the most prognostic and even cure value cancer in gastrointestinal malignancies. The application of new technologies and clinical specifications can improve the treatment effect and quality of life of patients. But in the past 30 years, the incidence of colorectal cancer in Shanghai has risen from seventh to second. In 2006, the incidence of colorectal cancer in men reached 475 / 100,000, which has become a serious threat to human health. At present, surgery is still the first choice for colorectal cancer. There are three types of gastrointestinal anastomosis during surgery, namely manual suture, metal staple anastomosis and pressure anastomosis. At present, gastrointestinal anastomosis is widely used at home and abroad, that is, the intestinal serous membrane is anastomosed with metal nails. However, because metal nails often remain on the anastomotic mucosa of the patient, complications such as poor anastomotic extension, fistula, bleeding, etc., make the patient painful. At the same time, because the anastomosis is exposed to the intestinal cavity and feces, it is easy to cause infection and hand infection. Declining operating quality.

Ni-Ti alloy is a shape memory alloy that can automatically restore its plastic deformation to its original shape at a specific temperature. The expansion rate is more than 20%, the fatigue life is 107 times, the damping performance is 10 times higher than that of ordinary springs, and the corrosion resistance is better than the best medical stainless steel at present. CAR technology can compress, ischemia and necrotic intestinal mucosa, and finally separate from the anastomosis. Because the entire process takes place in the anastomosis ring of the nickel-titanium alloy, anastomotic bleeding is prevented; since the repair process of the anastomotic mucosa is performed in a sterile state, the excrement in the intestinal cavity only contacts the alloy ring. G. Separation from anastomotic anastomosis can effectively reduce the anastomosis's seamless abutment on both sides of the intestine. There is no anastomotic staples or anastomotic lines in the middle, and the anastomosis will not be in contact with foreign objects.