Prerenal anuria

Prerenal anuria (A. praerenalis) is a condition in which the kidneys cannot perform their function of removing urine from the body. In this condition, urine accumulates in the kidneys and bladder, which can lead to serious health consequences.

The causes of prerenal anuria can be different. For example, this may be due to poor circulation in the kidneys, which can occur due to various diseases such as myocardial infarction, renal artery thrombosis, shock and others.

Symptoms of prerenal anuria include lack of urination, weakness, dizziness, headache and other signs of poor circulation. If left untreated, this condition can lead to kidney failure and other serious illnesses.

Treatment of prerenal anuria begins with eliminating the cause of its occurrence. If this is associated with diseases of the heart or blood vessels, then it is necessary to treat these diseases. If the cause is shock or another acute condition, then appropriate therapy is carried out.

In some cases, treatment of prerenal anuria may require dialysis, a procedure to cleanse the blood of toxins and metabolic products. An artificial kidney can also be used - a device that replaces the functions of the kidneys and helps remove urine from the body.

It is important to understand that prerenal anuria is a serious condition that requires immediate treatment. If you notice symptoms of this condition, see your doctor as soon as possible.

**Anuria due to circulatory failure**

Anuria is the absence of urination for more than 36 hours, that is, nocturia is noted after 12–24 hours of continuous attempts to urinate. The concept of “anuria” is one of the terms that suggests an unprofessional level of diagnostic thinking or incorrect medical application. This explains the lack of a clear and unambiguous approach among practitioners to the definition of this pathological symptom. Some believe that anuria without urine of any cause is enough to be included in this category. Others only imply the prevalence of laboratory indicators of urinary fluids over their anatomical absence, thus considering the latter to be inappropriate.

The concept of “prerenal anuria” is associated not with acute urinary retention, as in the case of uremia, coma and poisoning with chemical and biological poisons, but with a sudden cessation of urine circulation, following acute dilatation of the heart or acute renal exhaustion. Therefore, it is correct to call patients with anuria due to the listed conditions uremia or “extrarenal” anuria. Researchers conventionally call anuria that occurs periodically as prerenal, since kidney enlargement is often accompanied by collapsing conditions and cardiogenic hypotension. However, a legal framework gradually emerged in which the term “prerenal” is considered merely a synonym for the term “extrarenal”. This is due to the fact that these disorders must be considered in connection with a disorder of the intravascular microcirculatory mechanisms of the kidneys, intracortical arterioles and glomerular capillaries, where blood flow is impaired and urine formation is reduced. So, “prerenal” means “extrarenal”, this opinion has finally taken hold, but each of the above terms has retained a certain place even in modern medical literature. Kidney failure is named depending on which part is unable to maintain volumetric blood circulation - cortical, renal