Abstract:

Uterine disease after parturition is present in up to 40% of dairy cows and can cause cow infertility,which restricts efficiency of the cow production and leads to large economic loss.System administration and intrauterine infusion are widely utilized to treat cow endometritis.In recent years,the balloon technique is used gradually.Uterus washing pipe is used to inject liquid into the uterus and then the liquid and the inflammatory substances are discharged by the veterinarian.After the inflammatory substances cleaning up,the drug is delivered into the uterus.In order to provide a new method that can treat the infertility in dairy cows with metritis,323 cows which were diagnosed with metritis were used to detect the efficiency of balloon technique,the location of the balloon and the different drugs perfusion against infertility in dairy cows with metritis.The results showed that the balloon technique was showed remarkable effect against cow metritis comparing to the conventional technique.The pregnancy rate of the balloon technique was more than 60%,by contrast,the conventional technique was about 35%.Compared with being placed in the cornua uteri,the efficacy was more obvious when the balloon was placed in the uterine body,and the pregnancy rate was more than 60%.However,the pregnancy rate of another method was almost 40%.There were prominent curative effect of the three drug combinations.The pregnancy rates of the saline+Oxytetracycline,Lutajing+Gongdekang and saline were more than 70%,60% and 55%, respectively.Therefore,compared to the conventional technique and cornua uteri technique,balloon technique（uterine body）significantly increases the pregnancy rate,which is beneficial to be widely used in production.So it is significant that the new technique used widely is important for improving the production efficiency of dairy cows.

Key words: cow; infertility; metritis; balloon technique