Habermehl N L
Can Vet J. 1993 Nov;34(11):664-7.
Two field trials were conducted to determine the morbidity and mortality rates in heifers ovariectomized with a Willis spay instrument.Trial A used 384 Hereford and Hereford cross, auction source, heifers, weighing an average of 230 kg. In trial B, 138 auction and ranch source heifers of mixed breeding and weighing an average of 285 kg were used. All heifers were ovariectomized per vaginam, with the ovaries left in the abdomen. Prophylactic antibiotics were administered and heifers were observed at pasture for the next 150 days.The morbidity and mortality rates for heifers in trial A were 0.5% and 0.26%, respectively. In trial B, there was no morbidity or mortality.These trials indicate that the technique described is a low risk, expedient method of ovariectomizing heifers.
进行了两项田间试验，以确定使用威利斯去势器械对小母牛进行卵巢切除后的发病率和死亡率。试验A使用了384头来自拍卖市场的赫里福德及赫里福德杂交小母牛，平均体重230千克。在试验B中，使用了138头来自拍卖市场和牧场的混种小母牛，平均体重285千克。所有小母牛均经阴道进行卵巢切除，卵巢留在腹腔内。给予预防性抗生素，并在接下来的150天内在牧场观察小母牛。试验A中小母牛的发病率和死亡率分别为0.5%和0.26%。在试验B中，没有发病或死亡情况。这些试验表明，所描述的技术是一种对小母牛进行卵巢切除的低风险、便捷方法。
