Labels:text | screenshot | black and white | black | font | document OCR: i can be ely high Nephrogenic diabetes insipidus ( Fig. 5 readily distinguished by the inappropri the low plasma vasopressin levels in relation t on. urine osmolality attained after dehydra tures of Occasionally, polydipsic patients have ases, one nephrogenic diabetes insipidus. In such ores the week's treatment with desmopressin r ogenous responsiveness of the renal tubule to e ents may vasopressin is restored, Indeed, these p persistent even develop hyponatraemia because inappropriate drinking in the presence has been exogenous vasopressin. This observati it for recommended as the basis of a specific primary polydipsia.