No, This is NOT Indicative of Diabetes Insipidus
Your 24-hour urine output of 1362cc (approximately 1.4 liters) is well below the diagnostic threshold for diabetes insipidus, which requires polyuria greater than 3 liters per 24 hours in adults. 1, 2
Why This Rules Out Diabetes Insipidus
Urine volume is too low: Diabetes insipidus is defined by hypotonic polyuria exceeding 3,000 mL (3 liters) per 24 hours in adults, and your output of 1,362 mL is less than half this threshold 1, 3
Normal physiologic response: You consumed 64 oz (approximately 1,900 mL) of water and produced 1,362 mL of urine, representing about 72% output—this is entirely normal kidney function with appropriate water retention 4
Patients with true DI cannot concentrate urine: In diabetes insipidus, urine osmolality remains maximally dilute (<200 mOsm/kg H₂O) continuously, regardless of fluid intake, because the kidneys lack the ability to respond to or produce ADH 4, 1
Understanding the Pathophysiology
DI produces massive volumes: Patients with diabetes insipidus produce such enormous urine volumes that they experience "bed flooding" from single nocturnal voids, require "double nappies" (double-layered diapering) in children, and develop bladder dysfunction in 46% of cases from chronic exposure to overwhelming per-void volumes 5
The polyuria is relentless: True DI patients produce maximally dilute urine continuously with osmolality <200 mOsm/kg H₂O regardless of whether they drink water or not—the drinking is compensatory to prevent life-threatening dehydration, not the cause of the polyuria 4, 6
Your kidneys are working normally: The fact that you produced less urine than you consumed indicates your kidneys successfully concentrated urine and retained water, which is impossible in diabetes insipidus 4
What You Should Know
DI requires free access to fluids: Patients with true diabetes insipidus must drink enormous volumes (often several liters daily) just to stay alive and prevent hypernatremic dehydration—attempting to restrict fluids leads to dangerous hypernatremia 4, 6
Night waking is a hallmark: Nocturnal persistence of polyuria with multiple night wakings to urinate and drink is a good sign of the organic nature of diabetes insipidus 1
Your scenario is physiologically normal: Drinking 64 oz of water and producing 1.4 liters of urine over 24 hours represents normal kidney concentrating ability and appropriate fluid balance 4
Common Pitfall to Avoid
Do not confuse normal compensatory drinking in response to thirst with pathologic polyuria. In diabetes insipidus, the massive urine output comes first due to inability to concentrate urine, and the drinking is a desperate compensatory response—not the other way around 4, 6. Your urine volume is simply too low to represent this condition.