Reberg's test: how to pass?

2024 Author: Curtis Blomfield | [email protected]. Last modified: 2023-12-16 20:44

Our kidneys do a tremendous job every day, filtering liters of blood. However, some pathological processes can prevent organs from performing such an important task. The Rehberg test is exactly the analysis that helps the specialist determine how well the patient's kidneys are doing their job. In the article, we will present how to properly collect a urine sample for research in the laboratory, as indicated by the results of the analysis.

What is this?

So, the Rehberg test is a comprehensive study-test that helps determine the concentration of the creatine element in urine and blood serum. According to its results, a specialist can diagnose the fact of renal pathology or a violation of the functioning of the urinary system in general.

Rehberg's test will determine the quality of creatine excretion along with urine. For this purpose, both the composition of the patient's daily urine and the rate of purification of the blood mass by the kidneys in one minute are analyzed. This definition of the so-calledclearance (purification) of creatine. Allows you to assess the state of renal blood flow, the quality of reabsorption of primary urine in the tubules, the degree of blood filtration.

Thus, the Rehberg test is a comprehensive study of the performance of the renal system, its cleansing function.

When is the test scheduled?

A nephrologist directs a patient to a similar examination. The reason for this is:

1. Complaints of sharp and aching pains in the abdomen, kidney area.
2. Swelling of the mucous membranes, skin.
3. Complaints of constant aching in the joints.
4. High blood pressure (hypertension).
5. Feeling that the patient's bladder is not emptying completely.
6. Decreased daily urine output.
7. Itching, burning, pain and other discomfort when urinating.
8. Change in the color of urine (urine becomes brown, red, other dark shades, impurities of mucus, pus or blood appear in it).

When is analysis needed?

Reberg's test (we will definitely consider how to take the analysis correctly later) is prescribed by the attending physician for the following purposes:

1. Assess the general condition, performance of the renal system.
2. To diagnose this or that kidney disease, its severity, degree of progression, development dynamics.
3. Make a preliminary prediction of the success of the treatment.
4. Study how the kidneys function in a patient who is forced to take these poisonous organs(nephrotoxic) drugs.
5. Determine the degree of dehydration of the body.

Periodically, the Reberg test (it is important to know how to take an analysis correctly for everyone to whom it is prescribed) is prescribed to patients suffering from the following diseases and lesions:

• glomerulonephritis;
• arterial hypertension;
• jade;
• kidney failure;
• poisoning with drugs to stimulate cardiovascular activity;
• amyloidosis;
• hepatorenal syndrome;
• convulsive syndromes of various kinds;
• Cushing's syndrome;
• Goodpasture's syndrome;
• Alport syndrome;
• Wilms syndrome;
• thrombocytopenic purpura.

Let's move on to the next topic. Consider normal test results.

Normal performance

Our topic is Rehberg's test. Normal values for men are as follows (values are given in ml/min/1.7 m2):

1. Over 70 years - 55-113.
2. 60-70 - 61-120.
3. 50-60 - 68-126.
4. 40-50 - 75-133.
5. 30-40 - 82-140.
6. 1-30 - 88-146.
7. 0-1 - 65-100.

Now normal Rehberg test values for women:

1. Over 70 years - 52-105.
2. 60-70 - 58-110.
3. 50-60 - 64-116.
4. 40-50 - 69-122.
5. 30-40 - 75-128.
6. 1-30 - 81-134.
7. 0-1 - 65-100.

Pay attention to such a section as "total reabsorption of the tubules of the kidneys."Normal indicators there are 95-99%.

Note that in an adult who does not suffer from serious diseases and pathologies, the clearance (that is, the volume of blood that will be cleared of creatine in a certain period of time) is 125 ml per minute.

What do high values mean?

The results of the Reberg test (urine, blood here are samples for research in the laboratory) can only be accurately deciphered by a specialist. However, we will present the reader with a number of diseases, the presence of which can be indicated by indicators if they are above the norm in a particular patient:

1. Nephrotic syndrome.
2. Hypertension arterial.
3. Diabetes diabetes. High clearance rates in this case indicate a risk of developing renal failure.
4. The patient made up a diet with excessive amounts of protein food.

What do low readings mean?

We remind you once again that the article is not a basis for self-diagnosis - an accurate conclusion based on the results of the analysis will be presented to you by the attending doctor (nephrologist, therapist, urologist, functional diagnostician, pediatrician).

In different cases, reduced clearance rates will indicate the presence of the following pathologies and diseases in the patient:

1. General disruption of the renal system.
2. Glomerulonephritis.
3. Dehydration.
4. Renal failure, which manifests itself in both chronic and acuteform.
5. Violation of the outflow of urine. Here we are talking about various pathologies of the patient's bladder outlet.
6. Shock experienced by the body as a result of some kind of injury, operation or other serious shock.
7. Chronic heart failure.

What affects the result of the analysis?

How to take a Rehberg test? It is important to know this because the result of the analysis will be influenced by the following:

1. Exercise during urine sample collection inflates clearance.
2. A number of drugs underestimate this figure. These drugs include cephalosporins, Quinidine, Trimethoprim, Cimetidine, and others.
3. Age of the patient after forty years. As a rule, the clearance naturally decreases.
4. Violation by the patient of the rules for preparing for the collection of a material sample.
5. Breach of blood and urine sampling procedures by medical staff and patient.

Preparing for the test

Rehberg's test is a two-part study. The laboratory examines the patient's blood serum and a sample of his urine. It is worth preparing for the delivery of a blood test and a urine test. It makes no sense to conduct a Reberg test after a series of studies:

1. Gynecological examination.
2. X-ray.
3. Computed tomography.
4. Rectal examination.
5. Magnetic Resonance Therapy.
6. Ultrasound.

The patient prepares for urine collection as follows:

1. 1-2 days before the scheduled procedure, a person protects himself from all stresses - both physical and emotional.
2. A day before sampling, a number of drinks are excluded from the diet - caffeinated, tonic, energy, including any percentage of alcohol.
3. For 2-3 days, fatty and spicy products, smoked, meat food are removed from the usual diet.
4. 2-3 days before the test, you need to give up plant foods, which can change the color of urine. This includes some vegetables (carrots, beets), berries.
5. One week before the Rehberg test, the patient stops taking medications that affect the filtering ability of the kidneys. These include diuretics (diuretics), hormonal drugs.

To take a blood sample, the preparation will be as follows:

1. The analysis is best planned for the morning, as it is taken exclusively on an empty stomach. At least 10-12 hours should pass from the moment of the last meal.
2. If you smoke, the last cigarette should be smoked at least 3 hours before the procedure.
3. 30 minutes before blood sampling, the patient must be in complete physical and emotional rest.

Capillary blood sampling. That is, a specialist takes a sample from a finger using a scarifier.

Rehberg's test: how to collect urine?

If the blood sample for testingis taken in the treatment room by a specialist, then in most cases the patient collects a urine sample on his own. How to do it right?

How to collect Rehberg's sample:

1. The urine of the first morning urination is not suitable for analysis.
2. Be sure to take a hygienic shower after the first urination (this includes washing the genitals). Use only boiled water and neutral soap or shower gel for the procedure, as the product should not contain fragrances or dyes.
3. All subsequent urination should be made in a special prepared container (volume - 2-3 liters). Urine is stored at a temperature of 4-8 °. If this condition is not met, the physical properties of the urine will change, the analysis of the collected urine will show results that deviate from reality.
4. The most recent urine sample is taken exactly 24 hours after the first. That is, at about 6-8 am the next day.
5. Do not take all the collected liquid to the laboratory! Mix it well with a prepared stick and pour 50 ml of urine into a container for analysis. Cork with a cork, lid.
6. Prepare the container for submission to the laboratory, that is, fix a plate with the necessary information on it. This is the surname and name of the patient, his age, the date of collection of the material, the volume of all urine collected over the previous day. If the Rehberg test is assigned to a child or adolescent, then it is additionally necessary to indicate its weight and height.
7. Your urine container is sent to the laboratory on the day of the last collectionurine sample.

Reberg's test is a comprehensive study that consists of a patient's blood and urine test. Preparation for it should begin as early as a week before the planned date for providing samples for research. The urine sample is self-collected by the patient using standard procedures.