Diabetes Insipidus
Lab Findings
Low specific gravity
Lower glucose when compared to Diabetes Mellitus
Urine chemistry will be low for electrolytes
Nephrogenic
Normal synthesis of ADH but a defective renal tubular response to ADH.
Causes
Genetic errors in kidney function
Kidney Cysts
Kidney Infection
Cancer
Medications, especially ones containing lithium
Treatment
Low Salt Diet
Microzyde
Confirmatory Testing
Water Deprivation Test
ADH Blood level
MRI
Symptoms
Excessive Thirst
Nocturia
Dilute Urine
Frequent Urination
Constipation
Neurogenic
When synthesis and release of ADH are reduced
Causes
Genetic errors in brain
Brain Injury
Treatment
Mild Symptoms
Increase Water Intake
Severe Symptoms
Desmopressin, hormone that replaces ADH