Kidney function laboratory test package

During the laboratory test, we look at the excretory function of the kidney and its narrowing (e.g. inflammation).

Kidney function

The kidney is a paired, bean-shaped organ responsible for excretion. According to its function, it removes the breakdown products formed during metabolism, filters and purifies the blood, and regulates the body’s water balance and arterial blood pressure. In addition to the end products of nitrogen metabolism (urea, creatinine, uric acid), it also removes certain foreign substances – xenobiotics -, some inactivated hormones and drugs from the body. Normal products of metabolism (lactic acid, glucose, ketone bodies) are also excreted when their concentration exceeds the required (physiological) value.

Items tested in kidney function laboratory package

Creatinine

Creatinine is a protein-product deriving from the muscle that leaves the body through the kidneys. It is produced in constant quantities. Its level depends on muscle mass and kidney function. Men tend to have higher creatinine levels than women. Creatinine should not be confused with creatine, which is produced primarily by the liver and then from there it goes to the muscles, where the body utilizes it as an energy source during muscle work. Some of the creatine is converted to creatinine in the muscles.

What could be the cause of low creatinine levels?

  • Muscle mass loss
  • Ageing
  • Pregnancy
  •  

What could be the cause of high creatinine levels?

  • Urinary tract obstruction
  • Renal failure
  • Diet

Urea

Urea is a product of amino acid breakdown. It leaves the body through the kidneys.

What could be the cause of low urea levels?

  • Liver disease

What could be the cause of high urea levels?

  • Insufficient fluid intake
  • Urinary tract obstruction
  • Renal failure
  • Gastric bleeding
  • Consumption of foods high in protein

Uric acid

Uric acid is a breakdown product of purine compounds that is excreted in the urine. The average daily uric acid excretion is normally 150-250g. Uric acid poorly dissolves in water and can crystallize in the kidneys, leading to kidney stones.

General urine + sediment test

A urine test can also shed light on kidney function diseases and a number of internal medicine problems. Analysis of urine samples can detect urinary tract infections, but the result can also indicate the presence of diabetes or inflammation in the body.

In the urine sediment, 1-3 red blood cells are normally visible in the field of view, in case of a higher number, we talk about blood urination.

It is called pyuria if more than 4-6 white blood cells can be seen in the sediment.

If hyaline, white blood cells, and red blood cells are also visible (imprints of tubules from the kidneys), we are talking about cylinder emptying.

Bacterial emptying can only be considered if the bacterium is present in millions/ml of a medium-jet urine sample taken under sterile conditions.

The results of the kidney function laboratory test alone are not yet sufficient to make a diagnosis. If your complaints persist, our experienced internal medicine specialists are at your disposal.

How do I prepare for the test?

Kidney function laboratory testing requires an empty stomach, and a sample from the first morning urine. It is not recommended to perform the test during menstruation.

When is the result expected?

After the 2nd working day after the test.

The price of the kidney function laboratory package

4 000 HUF

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