Although the cause of acute renal failure caused many, but most acute renal failure patients in clinical process basically the same, can be broadly classified into oliguria period, the number of urine, three stages of recovery. ⑴ oliguria period: this period due to be more serious kidney damage, a sharp decline in glomerular filtration rate, urine output decreased significantly in a short period of time, all kinds of uremic toxins in the body volume of the system arising from systemic symptoms of poisoning. Severity of the disease and patients with conditions the speed of development and whether there may be high catabolism. There can be nausea and vomiting, abdominal distention diarrhea, gastrointestinal bleeding, hypertension, heart failure, unconsciousness, convulsions coma, severe acidosis and electrolyte abnormalities. Because immune function decline in easily with all kinds of infection, even when serious threat to the lives of patients. This usually last seven to 14 days, this period of longer duration, the worse the prognosis of patients. ⑵ polyuria period: acute renal failure patients urine over 400 ml, oliguria period from more than urine into the period, this period usually lasted one to three weeks. More urine at the beginning, the glomerular filtration rate has not yet resumed, renal function is still concentrated in poor, BUN, creatinine and potassium can also continue to increase, the period is still prone to water electrolyte, and acid-base imbalance Concurrent with acute renal failure and other complications, it is not the effect. ⑶ recovery: This period of acute renal failure patients renal cell regeneration, glomerular filtration rate gradually restored to the level before the onset, creatinine and blood urea nitrogen to the normal range. As tubular epithelial cells re-absorption often takes several months to recover, it should have damage to the kidneys anti-drug. A small number of serious cases of the final legacy of varying degrees of kidney structure and function of defects.
