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A fluid or water deprivation test is a medical test [1] 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 an excessive intake of water). The patient is required, for a prolonged period, to forgo intake of water completely, to determine ...
Some conditions with polydipsia as a symptom are non-psychogenic (e.g., early Type 2 diabetes, primary hyperaldosteronism, and zinc deficiency, and some forms of diabetes insipidus). Primary polydipsia is a diagnosis of exclusion.
Diabetes insipidus (DI) is a condition characterized by large amounts of dilute urine and increased thirst. [1] The amount of urine produced can be nearly 20 liters per day. [ 1 ] Reduction of fluid has little effect on the concentration of the urine. [ 1 ]
Central diabetes insipidus, recently renamed arginine vasopressin deficiency (AVP-D), [1] is a form of diabetes insipidus that is due to a lack of vasopressin (ADH) production in the brain. Vasopressin acts to increase the volume of blood (intravascularly), and decrease the volume of urine produced.
What is diabetes insipidus? You’re no doubt aware of diabetes mellitus, which has type 1 and type 2 variations. It’s a disorder of water balance and control in the body, explains Christopher ...
Desmopressin, sold under the trade name DDAVP among others, is a medication used to treat diabetes insipidus, bedwetting, hemophilia A, von Willebrand disease, and high blood urea levels. [1] In hemophilia A and von Willebrand disease, it should only be used for mild to moderate cases. [ 1 ]
In the absence of diabetes mellitus, the most common causes are the decreased secretion of aldosterone due to adrenal cortical tumor, primary polydipsia (excessive fluid drinking), central diabetes insipidus, and nephrogenic diabetes insipidus. [6] Polyuria may also be due to various chemical substances, such as diuretics, caffeine, and ethanol.
Both cause excessive urination (hence the similarity in name), but whereas diabetes insipidus is a problem with the production of antidiuretic hormone (neurogenic diabetes insipidus) or the kidneys' response to antidiuretic hormone (nephrogenic diabetes insipidus), diabetes mellitus causes polyuria via osmotic diuresis, due to the high blood ...