Fluid deprivation test no change in the water loss despite fluid deprivation, desmopressin may be administered to distinguish between the two types of diabetes insipidus which are central & nephrogenic diabetes insipidus. The time of deprivation may vary from 4 to 18 hours. The serum osmolality and urine osmolality are both measured in the test. The conditions can be distinguished in the following way: Fluid deprivation test A fluid or water deprivation test is a medical test which can be used to determine whether the patient has diabetes insipidus as opposed to other causes of polydipsia (a condition of excessive thirst that causes
Polydipsia in birds has been experimentally induced in pigeons, budgerigars and ducks, by the administration of lithium chloride (LiCl). The polydipsic effect was greatest in budgerigars, a desert-dwelling species with a well-developed fluid retention system, and least in ducks, a species with an efficient sodium-secretion system. In waterfowl, polydipsia can be a symptom of duck virus enteritis. Polydipsia has also been listed as a symptom of many diseases, including In hens, lesions of the supraoptic hypothalamus of the brain can result in polydipsia. Polydipsia sometimes occurs under housing or experimental conditions which purportedly lead to stress or frustration. Growing parent stock of meat-type