The polyuric phase of acute kidney insufficiency typically lasts from days to months. Acute kidney injury (AKI) progresses from prerenal AKI to ischemic AKI generally undergoes four phases: initiation, progression, persistence, and recovery (also known as polyuric phase).
In the polyuric phase, renal tubular epithelial cells are gradually repaired and regenerated, cellular and organ functions are gradually restored, and glomerular filtration rate gradually increases and returns to normal or near normal. The oliguric type begins to show an increase in urine output, followed by polyuria, and then returns to normal.
Compared with the glomerular filtration rate, the recovery of tubular epithelial cell function is relatively delayed, taking days to months to recover. Some patients are eventually left with varying degrees of renal structural and functional damage.
The outcome of acute kidney injury is related to the severity of the original disease and the severity of comorbidities. Patients are advised to actively cooperate with their doctors for treatment and timely correction of risk factors for the onset of the disease.