{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T06:52:25Z","timestamp":1760079145762,"version":"3.38.0"},"reference-count":28,"publisher":"American Veterinary Medical Association (AVMA)","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["javma"],"published-print":{"date-parts":[[2005,7,15]]},"abstract":"<jats:title>Abstract<\/jats:title>\n\t\t\t\t<jats:p>\n\t\t\t\t\t<jats:bold>Objective<\/jats:bold>\u2014To determine clinical examination findings,\nclinicopathologic abnormalities, and outcome of\ntreatment in dairy cattle with abomasal impaction.<\/jats:p>\n\t\t\t\t<jats:p>\n\t\t\t\t\t<jats:bold>Design<\/jats:bold>\u2014Retrospective study.<\/jats:p>\n\t\t\t\t<jats:p>\n\t\t\t\t\t<jats:bold>Animals<\/jats:bold>\u201480 lactating Holstein-Friesian cows \u2265 2 years\nold.<\/jats:p>\n\t\t\t\t<jats:p>\n\t\t\t\t\t<jats:bold>Procedure<\/jats:bold>\u2014Medical records of cattle with abomasal\nimpaction admitted between 1980 and 2003 were\nretrieved, and data were extracted.<\/jats:p>\n\t\t\t\t<jats:p>\n\t\t\t\t\t<jats:bold>Results<\/jats:bold>\u2014All cows were reported to have decreased\nfood intake; concurrent diseases were identified in 54\n(68%). Seventeen cows did not have detectable ruminal\nmotility, but physical examination findings were\nnonspecific and variable. In general, cattle had mild\nhypocalcemia, hyperbilirubinemia, and hyperglycemia,\nbut serum potassium and chloride concentrations\nwere typically within reference limits. Fifty-five (69%)\ncattle had impaction of the pyloric antrum alone, and\n25 (31%) had impaction of the abomasal body and\npyloric antrum. Right flank laparotomy and abomasal\nmassage were performed in 73 cattle. After surgery,\n54 (74%) cattle received 3 to 4 L of mineral oil, PO,\ndaily for 1 to 5 days. Short-term (ie, discharged from\nthe hospital) survival rate was significantly higher for\ncows with impaction of the pyloric antrum alone\n(42\/45 [93%]) than for cows with impaction of the\nbody and antrum (12\/24 [50%]).<\/jats:p>\n\t\t\t\t<jats:p>\n\t\t\t\t\t<jats:bold>Conclusions and Clinical Relevance<\/jats:bold>\u2014Results suggest\nthat physical examination findings and results of\nserum biochemical analyses do not facilitate the diagnosis\nof abomasal impaction in lactating Holstein\ncows and that exploratory right flank laparotomy is\nnecessary to make the diagnosis. Abomasal impaction\nshould be considered as a differential diagnosis for\ninappetence and poor milk production in lactating dairy\ncows. 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