Methods 54 cases of cervical spondylosis treated with anterior decompression and fusion between July 1995 to March 2001 were included and divided into manipulation distraction group, Cage distraction group and Caspar distractor group, depending on different methods of distraction during operation.

Application of a nwe type of circular retractor for anus,rectum,vagina and urethra in anal and rectal surgery;

This paper reports a new circular retractor for anal, rectal, vaginal and urethral surgeries.