The polyuric phase of acute renal failure usually lasts 1 to 3 weeks or longer.
The polyuric phase of acute renal failure is mainly included in the recovery period of acute renal failure, which lasts for a long or short period of time. Most patients in the early stage of the onset of the disease, there will be a decrease in urine output or even anuria state. With the removal of the cause of acute renal failure, the patient’s urine output begins to increase and enters the recovery period with polyuria.
During this period, the renal tubular epithelial cells are in a state of recovery, and their ability to concentrate urine decreases, but the glomerular filtration function has returned to normal, so there will be an increase in the amount of urine, and polyuria, i.e., a urine output of more than 2,500 ml/d, will occur in some patients, and can last for 1 to 3 weeks or longer. Regrowth of renal tubular epithelial cells and functional recovery may take months in some patients.
Patients with acute renal failure are advised to go to regular hospitals in time and standardize the treatment under doctor’s guidance.