Anovulation to a luteinising hormone surge in an aged goat with follicular cysts
Anovulation to a luteinising hormone surge in an aged goat with follicular cysts
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患有卵泡囊肿的老年山羊无排卵导致黄体生成素激增
DOI:
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发表时间:
2000
期刊:
影响因子:
--
通讯作者:
T. Sawada
中科院分区:
文献类型:
--
作者:
N. Kawate;N. Morita;M. Tsuji;H. Tamada;T. Inaba;T. Sawada
local thickening of the area, and probing is mostly inadequate in this area. Stocker and others (1989) and Medl and others (1994) reported that radiography and endoscopy were inefficient in these cases, respectively. Teat stenosis usually appears hyperechoic (Fig la) or sometimes hypoechoic. Foreign bodies, for example, haematoma (Fig 2c) and pus particles, have similar echogenity but these may be seen to move. The presence of milk affects the results of ultrasonographic examinations. These examinations are performed to full advantage when a teat is full of milk; if the teat is not full of milk misleading results can be obtained. If there is not enough milk in the teat despite the oxytocin injection (due, largely, to an obstruction in the annular area or to the absence of milk in mammary lobe), physiological saline solution should be administered to the sinus papillaris, except where there is an obstruction in the ductus papillaris or around the rosette of Furstenberg. When no liquid is given intrammamanly, the quality of the image is reduced. There are advantages and disadvantages of ultrasonographic examinations performed directly or in a water bath. Direct contact can be easily applied; however, the shape of the teat may change because the teat wall near the probe and the rosette of Furstenberg area cannot be seen completely. Nevertheless, direct contact has advantages in diagnosing stenosis at the base of the teats, because the water cup cannot easily be placed at the teat base and its dorsal levels. More detailed information can be obtained by water bath examination in other parts of the teat. As Stocker and others ( 1989) and Saratsis and Grunert (1993) reported, a 5 MHz frequency should be adequate in the diagnosis of teat stenosis. Stocker and others (1989) also reported that 3 5 MHz could be inadequate for the same purpose; however, Cartee and others (1986) reported that the blood vessels and mucosal folds of the teat became clearly visible with 10 MHz. In conclusion, it is suggested that ultrasonography should be used in the diagnosis of teat stenosis because of the better diagnostic characteristics compared with the classic clinical examination methods. Ultrasonography supports and complements the other methods.
影响因子:
3.6
作者:
FORTUNE, JE
通讯作者:
FORTUNE, JE