Symptoms of Acute Renal Failure

Acute Renal Failure refers to the renal function fail in just several days or even hours. The patients with Acute Renal Failure mainly have the following clinical symptoms.

Generally speaking, Acute Renal Failure goes through three processes: oliguria phrase, polyuria phrase and recovery phrase.

The oliguria phrase can last for 2~3 days or even 3~4 weeks. Usually, the longer oliguria phrase lasts, the more serious renal damage will be. In this phrase, the patients have edema, heart failure, nausea and so on. What’s worse, some patients even have pulmonary edema, chaotic heart rhythm, bleeding tendency, conscious disturbance and coma. The test results show that the patients may have hyperkalemia, metabolic acidosis, and progressive decline in renal function and so on.

After the oliguria phrase is over, the urine output volume increases gradually. In polyuria phrase, some patients’ urine output volume can reach 4000~5000 ml per day. In this phrase, BUN may increase continuously and may decline one week later. Moreover, the patients are very likely to have electrolyte and water negative balance and also have hypokalemia, hypokalemia and dehydration. In addition, as their immunity declines, they are very likely to have systemic infection.

Recovery phrase may last 3 months to one year. In most cases, the patients’ renal function can recover normal. However, some patients may have renal damage in varying degrees.


If the patients can receive timely treatment in time when they are affected by Acute Renal Failure, they will be able to get a good therapeutic effect.