Stages of acute renal failure

The clinical course is divided into four stages of acute renal failure.

Acute renal failure goes through several stages in its development.

initial stage (stage lesions)

At this stage, usually expressed symptoms corresponding to the main diseases caused by acute renal failure.

This stage can last from several hours to several days.With timely and adequate therapy is reversible disease.

Oligoanuricheskaya stage

Its duration is determined by the weight and volume of renal structures, but on average lasts up to three weeks.Sometimes oliguria (decreased urine output sharply) may be absent, but most of urine in the stage of the disease is reduced (usually to about 0.5 liters per day).Urine - dark color, it contains a lot of protein, but the proportion of her low (1003-1010).

accrues violation of electrolyte metabolism, accumulate in the blood products of nitrogen metabolism - creatinine, urea (azotemia), there is hyperkalemia.The patient experiences severe nausea, it arises vomiting, sometimes w

ith blood due to mucosal lesions of the gastrointestinal tract, diarrhea appears.Develop shortness of breath and chest pain, increases cardiovascular failure, pulmonary edema.

At this stage of the disease recorded maximum lethality, and if it is stretched to a month or more, it is regarded as a functioning part of the destruction of the kidneys.In the absence of oliguria prognosis is more favorable.

Poliuricheskaya (diuretic) stage

On average, this phase does not last more than two weeks and takes place in two stages.

first stage - early diuretic phase flows with a gradual increase in urine output;urine but low density admixture with erythrocyte protein nitrogenous compounds remain poorly allocated.

second phase - the phase of polyuria.At this time, the volume of urine per day may be up to 5 liters.Urine has a low density, electrolyte disturbances and the risk of dehydration persist.

At this stage, often joined by infectious complications, aggravating the patient's condition and worsen the prognosis of the disease.They contribute to the transition of acute to chronic disease (chronic renal insufficiency).

Step recovery

Its duration depends on the general condition of the patient and the severity of renal failure.It can take up to 6-12 months.During this period, in whole or in part normalizes the kidney, all the indicators are gradually coming back to normal.

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