Relationship between Ultrasonograms and Necropsy Findings of Bovine Renal Pelvic Calculi

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  • 牛腎石の超音波映像所見と剖検所見との関連
  • ウシ ジンセキ ノ チョウオンパ エイゾウ ショケン ト ボウケン ショケン

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In order to study an early detection of bovine clinical and subclinical urolithiasis by using ultrasonography (US), the relation between ultrasonograms and necropsy was examined on 78 kidneys (right, 62; left, 16) in 62 Holstein-Friesian cows with various diseases.<BR>In 52 of the 78 kidneys, stones in renal pelvics by US were observed, and they were classified into 3 types according to form of strong echo (SE) and acoustic shadow (AS) behind SE due to renal stone.<BR>Type I (5 kidneys) imaged as a shell-like-formed SE and wide AS; these kidneys had a large amount of calculi in renal calyxes in necropsy. Type II (33 kidneys) imaged as a spotty SE and narrow AS; these kidneys had a nearly 10mm in diameter stone or mass of many 1.5mm stones in necropsy. Type III (14 kidneys) imaged as a tiny or unclearly SE and thin AS; all but one of these kidneys had a rice-size stone or mass of nearly 0.5mm stones in necropsy.<BR>In 72 of the 78 kidneys (92.3%), ultrasonograms of renal pelvic stones were in accord with necropsy. It was clarified that stones bigger than 2-4mm in diameter in renal calyxes are able to be detected by using US.<BR>These results indicate that the US can be applied for early detection of bovine urolithiasis.

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