A new technigue of the macroscopic vasovasostomy has been reported. The procedure was carried out by suturing only tunic of the both ends of the vas with catgut to splint and reduce tension(Group 1 ).In animal experiment

this technigue was compared with following methods of vasovasostomy. ( 1 ) .tunic-muscular layer anastomosis without splint(Group 2)

(2).whole layer anastomosis with stainless steel splint (Group 3) and (3).whole layer anastomosis without splint. Among all dogs

the operative procedure was performed without the aid of optical magnification nor any special instruments. The four technigues were tested in 60 dogs (120 vasa) in which each of them used 15 dogs (30 vasa). The results of the dog experiments showed that the anatomical patency rates of the Group 1

2

3 and 4 after operation were 63.3%

66.7%

23.3%and 10%.Our studies indicate that the use of absorble catgut as an intravasal splinting and reducing tension in vasovasostomy is feasible in dogs.Gross as well as microscopic evaluation of the anastomotic area demonstrated that the intraluminal material was substantially absorbed with nosignificant reaction after operation.As compared with other macroscopic vasovasostomies

this technic is claimed to be simpler

easier

less traumatic

effective and feasible