Vasectomy and vasovasostomy. II. a comparison of two methods of vasovasostomy: silastic versus chromic stents
Urry, R.L.; Thompson, J.; Cockett, A.T.
Fertility and Sterility 27(8): 945-950
1976
ISSN/ISBN: 0015-0282 PMID: 955137 DOI: 10.1016/s0015-0282(16)42023-6Document Number: 437241
The use of Silastic and of chromic stenting materials for restoration of the patency of the severed canine vas deferens is compared. 12 adult male dogs were bilaterally vasectomized; 5 months later all has vasovasostomies. 6 animals had an intravas chromic stent and 6 had Silastic tubing rejoining the vas. Semen samples were evaluat ed for sperm count, motility, viability, andm orphology as well as for i on concentrations. Sperm reappeared in the ejaculate of all of the dogs in which Silastic had been utilized, but only 33% of the dogs with chromic stents had sperm appearing in the ejaculate. The overall quality of the semen was better in the dogs with Silastic stents; sperm motility, concentration, and viability was significantly higher than in the dogs with chromic stents. Most of the dogs had normal testicular and epididymal histology; 3 of the dogs with chromic stents with unsuccessful anastomosis had abnormal histology with reduced numbers of spermatocytes, spermatids, and spermatozoa.