Forty-eight cows with left displacement of the abomasum (LDA) and three clinically healthy control cows were examined ultrasonographically from the 11th and 12th intercostal spaces on the left side. In the controls, the rumen was immediately adjacent to the left abdominal wall, whereas in the cows with LDA the rumen was generally immediately adjacent to the left abdominal wall ventrally, but displaced by the abomasum more dorsally. The ultrasonographic findings were generally consistent in the cows with LDA. The ingesta that were visualised ventrally in the abomasum appeared echogenic to hypoechogenic and, in a few cows, the abomasal folds were visible as elongated, echogenic, sickle-shaped structures. The dorsal abomasal gas cap was characterised by reverberation artifacts from the abomasal surface.
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