Reticulo-omasal stenosis in the cow: differential diagnosis with respect to pyloric stenosis

In the complex called vagal indigestion two main types of stenosis can be distinguished, pyloric stenosis and stenosis between the reticulum and omasum or reticulo-omasal stenosis. Laboratory examinations of blood and rumen fluid were carried out in 10 cows with reticulo-omasal stenosis. The results are discussed with respect to the differential diagnoses of pyloric stenosis. In the cows with reticulo-omasal stenosis no metabolic alkalosis occurred and consequently dehydration and uraemia did not develop. For the clinician valuable points of difference were a more prolonged and chronic course and, on physical examination, the absence of serious circulatory disturbances and the absence of an ammoniacal-uraemic odour in the expired air. The clinical picture of reticulo-omasal stenosis strongly resembles a syndrome described as failure of omasal transport.

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