Polyuria is clinically referred to as polyuria and can be divided into physiological, environmental and pathological factors, and generally pathological factors are commonly caused by urinary tract infections.
Normal adult urine output in 24 h is about 1 to 2 L, with an average of 1.5 L. More than 2,500 ml of urine per day in 24 hours is clinically referred to as polyuria.
Polyuria can be caused by physiological, environmental and pathological factors.
Physiological factors, such as drinking a lot of water, drinking tea, eating too much salt or eating too much sugar, can also cause polyuria.
Environmental factors, such as cooler weather, less sweating, and water being excreted only through the kidneys.
Pathological factors, clinically seen in: 1. Urogynecology. The hypothalamic-pituitary hypofunction and reduced secretion of antidiuretic hormone cause polyuria due to decreased renal tubular reabsorption. 2. Diabetes mellitus: A large amount of sugar is excreted in the urine due to hyperglycemia, which can cause solute diuresis. Hypercalcemia: In hyperparathyroidism or multiple myeloma, elevated blood calcium damages the renal tubules and reduces their reabsorption function, causing polyuria. Polyuria caused by kidney disease is seen in the early stage of chronic renal failure, which is characterized by an increase in nocturnal urine volume. Polyuria in acute renal failure or non-oliguric type of acute renal failure can show polyuria, which is a manifestation of renal tubular concentration dysfunction.5. Solute polyuria. The patient has to use mannitol and sorbitol for therapeutic reasons, and hyperglycemia can show polyuria, which is more significant if diuretic drugs are applied at the same time. 6. Urinary tract infection.
When polyuria is found, a regular hospital visit is needed to identify the cause and diagnose and treat it in a timely manner.