Etymed
nocturia
Definition
excessive urination during the night
Clinical context
A 65-year-old man presents with a 6-month history of waking up 3-4 times per night to void. He reports significant sleep disruption and daytime fatigue. His physical examination is unremarkable with normal vital signs. Laboratory studies reveal a serum creatinine of 1.2 mg/dL and a urine osmolality of 300 mOsm/kg. These findings are consistent with nocturia, likely due to decreased antidiuretic hormone (ADH) secretion during sleep.
Mnemonic
NOCTURIA - Night time Overactive Bladder with Urinary Incontinence and Renal Impairment