Kidney function blood test – Normal blood chemistry, which verifies that the kidneys are working properly – by measuring the level of urea, creatine, and some salt and comparing this level with the reference values (norm).
The kidneys regulate the amount of water and salts that are in our body. They do this by filtering the blood through the millions of cell structures called nephrons. The kidneys also produce some waste from the body. Excess water, salts, and waste is transferred from the body through the kidneys to the bladder and is excreted in the urine.
Routine analysis for the study of renal function is one of the most commonly performed blood tests.
In Russia, unlike in most developed countries, routine analysis of renal function “is still not widespread. To get directions to this analysis, we must, as a rule, have a serious reading. When the result was already predicted in advance with the naked eye. Of the economy. As a rule, first make urine.
Routine analysis of renal function
Normal blood test that checks that the kidneys are working properly, measures the level of urea, creatine, and certain dissolved salts in the blood.
Urea is a waste generated in the decay of proteins. With the help of urine urea output. High blood levels of urea (uremia) means that the kidneys cannot function properly, or – a symptom of dehydration (low water content in the body).
Creatine is a byproduct, carried out by the muscles. Creatine into the bloodstream and is excreted in the body in urine. High blood levels of creatine indicate that the kidneys cannot function properly. Creatine level in blood is generally more accurate marker of renal function than blood urea.
Dissolved salts, which are usually measured in a blood test for kidney function – is the sodium, potassium, chloride and bicarbonate. They are sometimes called “electrolytes”. Abnormal blood levels of any of the electrolytes may be associated with kidney problems. (Some other conditions may also affect the salt balance in the blood.)
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Indications for the analysis of renal function
Regular study of renal function is one of the most commonly performed blood tests. It may be done: The main indications for blood analysis:
- within the overall assessment of human health.
- if you suspect dehydration (with increasing urea level).
- if there is a suspicion of renal failure. The higher blood levels of urea and creatine, the worse the kidneys work. Creatine level is generally used as a marker of the severity of renal failure.
Creatine in itself is not harmful, but high levels of blood creatine means that the kidneys are not working properly. That is, many other waste while also not removed from the blood by the kidneys.
If the creatine level rises above a certain value, then the patient requires dialysis.
- before and after treatment with certain medicines. Certain drugs sometimes cause kidney damage, as a side effect. Therefore, indicators of kidney function are often measured before and after treatment with certain drugs.