| 1. Title: Chemical vas occlusion in the People's Republic of China. Author: Xiao B Source: In: Fertility regulation today and tomorrow, [edited by] E. Diczfalusy and M. Bygdeman. New York, New York, Raven Press, 1987. :265-74. (Serono Symposia Publications from Raven Press, Volume 36) Abstract: In various provinces of China, such as Shanxi, Sichuan, Hebei, Shannxi, Hubei, and Heilongjiang, methods of vas occlusion have been investigated since the 1970s. Li's method of percutaneous chemical vas occlusion has been the most successful and Shao Shen-cai's reversible percutaneous vas occlusion seems to be a promising method. This paper reviews the clinical trials of these 2 methods. The author points out that over the last 2 years, there has been an increasing trend in male sterilization in China. With the development of simpler, more effective and safer non-surgical methods of sterilization, the adoption of male contraception would be extended to a wider population. Epidemiological studies of a large number of volunteers of chemical vas occlusion with a mixture of carbolic acid and n-butyl alpha cyanoacrylate in Sichuan Province of China will give a clearer picture of the complications, follow-up of failure cases, and long term safety of the method. The possibility of reanastomosis and recanalization of the vas after chemical occlusion needs to be explored. The reversible percutaneous occlusion method with polyurethane elastomer is still in the early stage of development. Long term follow-up studies are necessary before it could be claimed to be an effective and safe reversible method of male sterilization. Language: English Keywords: CHINA | VAS OCCLUSION | MALE STERILIZATION | RESEARCH AND DEVELOPMENT | CONTRACEPTION RESEARCH | MALE CONTRACEPTION | SIDE EFFECTS | Developing Countries | Asia, Eastern | Asia | Vasectomy | Sterilization, Sexual | Family Planning | Technology | Economic Factors | Contraception | Treatment Document Number: 201604 |
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