Microsurgical epididymovasostomy by loop intussusception. A new technique in the rat model.

A new technique, epididymal loop intussusception into the vas deferens, is offered as an improved form compared with the side-to-end method. Loop intussusception has been experimentally studied bilaterally in 15 adult male rats. This report provides details of the technique. A 3-month anatomical and histological follow-up showed a 100% patency rate, no anastomotic stricture, and reabsorption of the blind intussuscepted loop in all but 3 cases. Macroscopic sperm granulomas were present in only 10% of the anastomoses examined. Advantages and disadvantages of microsurgical epididymovasostomy techniques are discussed.