<prompt> Polyuria is urine output more than ___ litday1234  <response>: excessive or abnormally large production andor passage of urine 3 L per day in adults. Frequent urination -- accompanying syndrome Diuresis -- increased production and passage of urine Mechanisms of polyuria Due to excretion of increased nonabsorbable solutessuch as glucose -- SOLUTE DIURESIS Due to excretion of increased waterfrom a defect in ADH production or renal responsiveness -- WATER DIURESIS Polyuria is urine output of 3 Lday Oliguria, defined as 400 mL24 h Anuria is the complete absence of urine formation 100 mL in 24 hr ref : Harrisons 20th ed pg: 292 