Blood test for rheumatic tests, what is it, how to take it, decoding and the norm

Rheumatoid pathologies include over 120 varieties of diseases characterized by systemic damage, in some cases local. The main symptoms of the disease:

  • damage to joints, muscles;
  • damage to the tendons, ligamentous apparatus;
  • bone damage.

That is why, if there is suspicion of the development of any of the diseases, you need to take a blood test for rheumatic tests.

Pictured is a woman with rheumatoid arthritis.

  • There is no single answer to this question.
  • Medicine has a number of assumptions why rheumatic lesions develop, but most doctors agreed that the main reason is heredity.
  • The predisposition, coupled with provoking factors, leads to a malfunction of the immune system, as a result of which a gene that provokes rheumatic diseases is activated. Provoking factors include:
  • infectious diseases;
  • poisoning the body with toxins;
  • stress;
  • hormonal imbalance;
  • exposure to UV rays on the dermis.

The risk zone for rheumatic pathologies includes people over 50 years old, moreover, the male gender is more susceptible to this, in rare cases, young people, women of childbearing age.

Often blood for rheumatic tests is necessary to understand the ongoing changes in the connective tissue, and in what condition it is: gout, rheumatoid arthritis, lupus erythematosus. Indications for the delivery of rheumatoid samples:

  • pain, swelling in the joints;
  • obvious changes in the asymmetry of the body;
  • difficulty in mobility of ligaments, joints;
  • pain in the lumbar, body aches;
  • frequent migraine, not able to subside even under the influence of analgesics;
  • increased body temperature for a long period of unknown etiology.

A blood test for rheumatic tests in the presence of the described symptoms makes it possible to determine the activity of the development of pathology, to predict the course of the disease in the future.

A blood test for rheumatic tests is characterized by a set of studies, which reveal the number of main factors that provoke cancer and other diseases.

It is important to know the ratio of indicators in percent, because the slightest change can indicate different forms of the pathological condition. With the help of indicators, you can find out the severity and stage of the disease.

The analysis allows you to determine the cause and determine the treatment regimen. Thanks to rheumatic tests, doctors monitor the therapeutic process, can correct it if necessary. The basis of a blood test for rheumatic tests includes:

  • Rheumatoid factor (RF) is an indicator of an acute pathological process. In healthy people, this factor is absent, i.e. equal to zero. Also, a figure not exceeding 14 IU / ml is considered an indicator of the norm of the Russian Federation in analysis in adults. In this case, the results are negative, with a value above the norm – positive. Overstated indicators are a sign of the inflammatory process of any etiology, location. This mainly happens when:

The presence of RF in the blood may be due to physiological reasons. For example, an increase occurs when a person had fatty foods in the diet on the eve of the test, or the body was physically stressed.

In old age, this protein in blood plasma is always present due to age-related changes. A decrease may occur as a result of taking certain groups of drugs, due to which the analysis will be false negative.

  • ASLO (antistreptolysin O) is an indicator of the increased presence of streptococcal infection. Often, an primary lesion leads to an increase in streptococci:
    • urogenital canal;
    • respiratory tract;
    • intestinal tract;
    • the kidneys.

With the long-term presence of infection and its activity in the body, autoimmune diseases begin. However, in a healthy person, antistreptolysin is present in the blood, the indicators of which are equal to the norm.

The number may increase for several reasons – excessive cholesterol, stress, physical labor (load). A false-negative indicator can be recorded when taking hormonal and antibacterial agents.

  • C-reactive protein is an indicator of the course of acute inflammation in the body. It is used both for diagnosis and for monitoring the results of therapy. An increase in this indicator in the blood indicates the development of the inflammatory process. It can also be a sign of a tumor, a bell to a heart attack. A decrease in plasma protein during treatment indicates the failure of therapy. A low C-reactive protein is not taken into account, since it does not really matter.

Protein performs the necessary functions for the human body – increases the number of antibodies to resist infection, stimulates and activates the immune system.

On the other hand, strong stimulation of the protective function of the body can provoke autoimmune diseases, due to which internal organs are attacked by their own antibodies.

The reaction rate of the protein is high, already 5 hours after the infection gets inside. The protein level is proportional to the rate of development of the pathological condition. This means the more the disease progresses, the higher the C-reactive protein becomes. For this reason, tracking this indicator in the dynamics is important.

It must be borne in mind that the protein reacts to an exacerbated disease, when the transition to the chronic stage occurs, the indicator returns to normal. The resumption of the amount of protein in blood plasma also occurs with exacerbation of the chronic form.

Additional laboratory research includes:

  • CEC analysis (Circulating Immune Complexes) – antibodies and enzymes produced by the immune system. An increased indicator in the analysis indicates the accumulation of complex components in the tissues of the body.
  • Albumin, a substance present in all organisms, is part of the blood (a protein compound). Its level characterizes the functioning of the liver and k >

In some cases, a PCP test may be needed – a cyclic citrulline peptide, which is a more specific indicator than RF. A hemotest for identifying markers is prescribed subject to x-ray evidence in a patient for rheumatoid arthritis.

The conclusion is confirmed by OAC, biochemical analysis of the material, the study of joint fluid. A positive test for PCP is 100% evidence of acute rheumatoid arthritis in a patient.

The norm is a figure within 3 U / ml, the maximum value is 5 U / ml.

IndexAge categoryNormal level
ASLOAdults0 – 203
Children, teensto 150
RFAdultsto 15
Children under 12 years oldto 13
C-reactive proteinAt any age0 – 5
AlbumenOver 60 years35 – 50
Children up to 14 years old37 – 54
CECAt any age30 – 90
Total proteinSeniors from 60 years old63 – 84
Adolescents and adults from 15-60 years old65 – 85
Newborns up to 1 year old46 – 74
Children from 1 to 460 – 76
Children from 5 to 1558 – 77
SeromucoidsIn any age category0,22 – 0,28
Uric acidMen200 – 480
Women140 – 380
Monthly children80 – 311
Children from 2 months to a year90 – 372
From 1 to 14 years120 – 362

IMPORTANT! Norm indicators may vary slightly depending on technical equipment, source biomaterials, laboratory research methods.

Analysis for rheumatic tests must be taken in the early morning on an empty stomach. First, you must adhere to the following rules, otherwise the result of the study will be distorted:

  • the interval between blood donation for the study and the last meal should be 8 hours or more;
  • 14 days before the test, you need to finish taking any medications. If the patient cannot interrupt the course of treatment, and rheumatic tests are urgently needed, then it is mandatory to give the laboratory assistant a list of the names of the funds taken;
  • a day before blood donation for examination to exclude mental and physical stress;
  • It is also recommended to remove fatty, fried foods, caffeinated drinks, alcohol from the diet 24 hours before the analysis.
  1. Blood for analysis of the 3 main markers (RF, ASLO, C-reactive protein) is taken from a patient from a vein only 1 time and examined in vitro in vitro.
  2. If rheumatism is suspected (a poor indicator of ASLO), the biomaterial will need to be re-submitted after a week in order to track the dynamics of the pathology.
  3. If necessary, the doctor prescribes an analysis for rheumatic tests, including additional indicators – CEC, albumin, total protein.

For this, the material is taken from the vein several times. The duration of the study depends on the laboratory. Usually the form with the result is ready after a day.

Each of the indicators performs its specific functions, therefore only an examination in a complex reveals the development of pathology with high accuracy.

Mostly doctors rely on 3 main indicators, the values ​​of which indicate the presence or absence of any disease. What kind of illness it may turn out to be, we consider below in the table.

IndexAbove the norm
RFIndicates viral diseases, rheumatologic arthritis, reveals a seronegative and seropositive variety of arthritis.
ASLOAcute rheumatic fever, streptococcal infection, rheumatism.
C-reactive protein (C-RB)Acute inflammation caused by rheumatoid arthritis, rheumatism, or myocardial damage. C-RB exceeding the norm by 20 times – an exacerbation of acute rheumatic disease, an off-scale indicator (up to 120 mg / l) – acute infection.

Rheumatoid factor

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Indications for conduction

Positive rheumatic tests confirm rheumatoid arthritis, acute rheumatic fever in children and ankylosing spondylitis.

Blood should be examined for rheumatic tests if the following symptoms occur:

  • joint pain at rest and movement;
  • morning stiffness in the joints;
  • discomfort in the back;
  • temperature is more than 2 weeks;
  • the appearance of a small rash on the body;
  • suspected complication of streptococcal diseases;
  • prolonged sluggish diseases;
  • autoimmune pathologies.

The most common symptoms that allow a doctor to prescribe a rheumatoid test are:

  1. Joint pain, swelling.
  2. Disruption of the joints.
  3. Body aches with changing weather conditions, as well as pain in the lumbar spine.
  4. Frequent and prolonged headaches.
  5. Subfebrile temperature.

Also, the grounds for the appointment of an analysis are suspicions of:

  • Systemic diseases of the connective tissue (systemic lupus erythematosus, rheumatoid arthritis and others).
  • Malignant tumors.
  • Diseases of the liver.
  • Sepsis.
  • Chronic tonsillitis.

It is recommended to donate blood for rheumatic tests in such cases:

  • complaints of joint pain in an adult or child;
  • discomfort in the back, especially in the lower back;
  • unclear fever for more than 2 weeks;
  • suspected vasculitis;
  • pathologies caused by streptococcus (erysipelas, otitis media, scarlet fever);
  • complications of streptococcal infections (rheumatism, glomerulonephritis, myocarditis);
  • prolonged chronic course of inflammatory diseases;
  • autoimmune lesions.

Briefly about laboratory tests

A study of blood plasma for rheumatic tests in children and adults is prescribed for the differential diagnosis of joint pathologies of inflammatory etiology. A laboratory examination is done to finally confirm the diagnosis, assess the activity of the course of arthritis and the severity of inflammation. Based on the results of the analyzes, the selection of therapy, correction and evaluation of treatment results are carried out. Rheumatic tests allow predicting the recovery or development of complications of rheumatism.

The analysis for rheumatic tests includes the following parameters:

  • antistreptolysin-O;
  • rheumatoid factor;
  • C-reactive protein.

Determination of rheumatoid factor is the main laboratory method for the diagnosis of rheumatoid arthritis.

They also distinguish an expanded spectrum of rheumatic tests, which includes such indicators:

  • the amount of plasma protein and its fractions;
  • assessment of the formula of leukocytes;
  • determination of ESR;
  • antibodies to mitochondrial components and nuclei;
  • uric acid concentration;
  • quantitative indicators of immune complexes.

Preliminary preparation

The doctor may recommend a blood test for rheumatic tests in the presence of patient complaints about:

  • joint pain, especially of a “volatile” nature, aches, stiffness, morning stiffness of movements;
  • swelling, redness of the periarticular tissues;
  • enlarged lymph nodes;
  • elevated body temperature;
  • the first occurrence of shortness of breath, palpitations, interruptions in contractions and poor tolerance of physical activity;
  • sharp weakness, sweating, pain in the heart after suffering a sore throat, scarlet fever;
  • persistent headaches (with suspected vasculitis);
  • skin rash.

After analysis, the doctor can diagnose an autoimmune disease based on detected abnormalities and clinical signs of the disease. Its feature is a violation of the immune system in the body. Own tissues change their properties after exposure to viruses, germs, intoxication, and cells of the immune system (white blood cells) perceive them as foreign.

As a result, immune complexes consisting of antigen and antibody are formed. They circulate in the blood and accumulate on the surface of the joint, in the skin, kidneys, lungs, and vascular walls, causing an inflammatory process. Its indicators are revealed during a rheumatic test.

Often, with the already known diagnosis (lupus, scleroderma, rheumatoid arthritis, endocarditis, myocarditis, vasculitis), it is necessary to determine the degree of inflammation. This is necessary for the choice of drug therapy and dosages of hormones, cytostatics.

Biochemistry is done on an empty stomach. The time from the last meal and the collection of biological material should be 8-12 hours. The use of sweet juices, teas or caffeinated drinks is prohibited. In order to prepare for the examination, it is advisable to exclude alcohol and smoking at least 3 days before the test.

An analysis of rheumatic samples from a vein is best done in the morning on an empty stomach. The interval between the last meal and the delivery of biological material is 10-12 hours. Preparation for analysis includes refusal to consume sugary and caffeinated drinks. Properly refrain from drinking alcohol and smoking for 3 days before the examination.

For the most productive study on the eve, it is imperative to observe several rules:

  1. The last meal is made 7-10 hours before analysis.
  2. For a day you need not eat fatty, fried, do not drink alcohol, and also exclude tea and coffee from the diet.
  3. During the day before the procedure, it is necessary to avo >

It is advisable to adhere to these rules, otherwise the procedure will need to be postponed so as not to get an erroneous result.

The time interval between examination and the last meal should be more than 8 hours.

It is advisable to donate blood for rheumatic tests even before the patient began to take medicines. If this is not possible, it is advisable to postpone the examination. Only after 2 weeks after the end of the course of treatment and the end of the patient taking medication, a laboratory examination is prescribed.

If the course of treatment is long and it is impossible to interrupt, and the examination must be done urgently, then the name of the medications that the patient is taking must be indicated.

The day before the examination, try to exclude:

  • all kinds of loads (physical and mental);
  • fried and fatty foods;
  • drinking alcohol, tea and coffee.

If you do not adhere to all the above rules, it is extremely likely that you will receive an erroneous result.

There are diseases for the diagnosis of which it is recommended to undergo examination for rheumatic tests. The most common ones are:

  • lupus erythematosus;
  • disco >

The standard set includes tests to identify and measure the level:

  • Rheumatoid factor.
  • CRP (C-reactive protein).
  • Antistreptolysin-O.

Additional studies may also be included on:

  • Antibodies to the CCP.
  • The level of total protein.
  • Circulating immune complexes.
  • Uric acid.

Rheumatoid factor

Rheumatoid factor allows you to accurately diagnose rheumatism.

Level ofIndicator, UNIT
Heavygt; 100

Rheumatoid factor

Why do I need to take a blood test for rheumatic tests

Due to the fact that such an analysis includes a number of laboratory tests, there is no norm of rheumatic test as such. To determine the result, the indicators of each criterion should be taken into account separately.

Rheumatoid factor – specific autoantibodies that respond to their own modified immunoglobulins G, entering into a destructive reaction with them. This happens, for example, under the influence of a virus.

A negative indicator or result equal to 0 is considered normal.

However, there is an upper limit to the conditional norm, within which the test for the presence of this criterion is considered negative:

  • Adults – up to 13,9 IU / ml.
  • Children – less than 12,3 IU / ml.

An age group of 50 and older is an exception, since due to age the result will be positive.

Also, a violation of the rules for preparing for a rheumatic test, for example, eating fatty foods, affects the identification of a rheumatoid factor.

The increase in the indicator is usually caused only by the appearance of streptococcal infection in the body. As a reaction to its occurrence, antibodies are produced whose prolonged contact with the infection causes pathologies.

A deviation from the normal level of antistreptolysin in the blood indicates the presence of a focus of streptococcal infection, or a recent illness.

The norm for this criterion:

  • Children under 14 years old – up to 148 units / ml.
  • Adults and adolescents over 14 years old – up to 198 units / ml.

Each of the indicators of the blood test carries certain information.

Total protein

By the amount of total protein can be judged on human health in general. If rheumatic tests detect an increase or decrease in the amount of protein, this will indicate pathologies in the body. To determine the specific disease that contributed to this, further examinations are necessary.

Rheumatoid tests or rheumatic tests are prescribed by a doctor to confirm autoimmune pathologies:

  • arthritis;
  • thyroiditis;
  • polymyositis and autoimmune prostatitis (in men);
  • multiple sclerosis;
  • scleroderma.

Often, an analysis for rheumatic tests is prescribed to determine pathological changes in the connective tissue (rheumatoid arthritis, systemic lupus erythematosus, gout).

Analysis for rheumatic tests helps to know the condition of the joints, for example, with arthritis

Indications for such a study are the following symptoms of disorders in the soft tissues:

  • swelling and pain in the joints;
  • changes in body asymmetry;
  • impaired mobility of joints and ligaments;
  • pain in the lower back, and with weather changes – aches throughout the body;
  • frequent headaches that do not respond to analgesics (vasculitis symptom);
  • prolonged increase in body temperature for no apparent reason.

Types of rheumatic tests

To confirm autoimmune diseases, a rheumatic complex of several types of markers is used:

  1. Antistreptolysin-O (ASLO) – the identification of protective cells of the body to streptococcal antigens. This is a kind of analysis for rheumatism, since ASL in the blood helps to distinguish a similar disease from rheumatoid arthritis (the concentration of this marker is different for such pathologies).
  2. Rheumatoid factor (rheumatic factor). With rheumatoid disease, a protein appears in the blood, which the immune system takes as a foreign body and begins to develop protection against it. The rheumatic factor test consists in detecting such antibodies to native antigens. The results allow the identification of connective tissue disease.
  3. C-reactive protein (C-RB) is a type of rheumatic test that indicates an acute inflammatory process in the soft tissues. The analysis helps to identify pathology in time and prescribe antibacterial therapy.
  4. Total protein. The marker makes it possible to determine the level of protein and its components – albumin and globulin.
  5. Circulating immune complexes (CEC). Identification of cells that are damaged by the protective compounds of the body.
  6. General blood test (with leukocyte formula) – the study of biological material for changes in the number of lymphocytes or neurophiles. Research helps identify inflammation caused by infections.

Rheumatological analysis makes it possible to accurately determine the type, as well as the localization of negative changes in the soft tissues. The study of rheumatic tests in a biochemical blood test helps to prevent the further development of a dangerous disease and to choose an effective treatment.

There are generally accepted norms for the indicators of the rheumatic complex, which contribute to the confirmation or refutation of the presence of pathology in the body.

Indicators and age groupValue
In adultsFrom 0 to 203 units / ml
In children (before adolescence)Up to 151 units / ml
Rheumatic factor
In adultsUp to 15 IU / ml
In children (up to 12 years old)Up to 13 IU / ml
C-reactive protein (regardless of age)0 (the indicator can also be attributed to a negative value when the rheumatic test is positive, but not more than 5 IU / ml)
In adults under 60 years of age after 60 years of age35–50 g / l 33–49 g / l
In children (up to 14 years old)37–54 g / l
Total protein
In adults from 15 to 60 years old65–85 g / l
In older people (after 60 years)63–84 g / l
In a child up to a year of life46 to 74 g / l
From year to 4 years60–76 g / l
5-15 years58–77 g / l

The results of tests for rheumatism and autoimmune pathologies largely depend on the preparation of the patient for the study.

  1. Venous blood is taken on an empty stomach in the morning.
  2. From the evening until the moment of the analysis, it is advisable not to eat anything. You can drink plain water without gas.
  3. Before donating blood (for 1-2 days) do not drink coffee drinks, alcohol, junk food. Do not smoke on the day of analysis.
  4. At least a day before the delivery of biological material to minimize physical activity, try not to overwork emotionally, avoid stress.

A few days before the test, refrain from drinking coffee.

It is not recommended to donate blood for rheumatic tests during the period of taking medications – they can distort the test results. Therefore, the study is best done 2 weeks after the end of therapy. If it is not possible to withstand such a gap, the patient should notify the doctor about the medications used.

Analysis for rheumatic tests – a complex, consisting of tests for ESR, a biochemical blood test for the content of protein and its fractions, rheumatoid factor, C-reactive protein, antistreptolysin, circulating immune complexes. Also, rheumatic tests help in the initial stages to identify cancer.

This set of special tests is often used in medical practice to determine the development of the inflammatory process and the degree of damage to internal organs.

This set of special tests is often used in medical practice to determine the development of the inflammatory process and the degree of damage to internal organs.

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Svetlana Borszavich

General practitioner, cardiologist, with active work in therapy, gastroenterology, cardiology, rheumatology, immunology with allergology.
Fluent in general clinical methods for the diagnosis and treatment of heart disease, as well as electrocardiography, echocardiography, monitoring of cholera on an ECG and daily monitoring of blood pressure.
The treatment complex developed by the author significantly helps with cerebrovascular injuries and metabolic disorders in the brain and vascular diseases: hypertension and complications caused by diabetes.
The author is a member of the European Society of Therapists, a regular participant in scientific conferences and congresses in the field of cardiology and general medicine. She has repeatedly participated in a research program at a private university in Japan in the field of reconstructive medicine.