Why donate blood to RW? What kind of research is it and who needs it?

Quite often during a consultation with a doctor orIn a general medical examination, patients are advised to donate blood to the RW. What is this analysis? What is the purpose of this study? What diseases can be diagnosed with this test? Many people are interested in these questions.

Blood on RW - what is it?

This analysis is better known in medicine forcalled Wasserman's reaction. Such testing is highly specific and is used by doctors to diagnose syphilis. The importance of the study is difficult to overestimate, as it makes it possible to diagnose the disease in the early stages of its development, when there are no noticeable external symptoms.

In addition, Wasserman's reaction gives the doctor an opportunity to judge how actively pale treponema (the causative agent of syphilis) behaves and, accordingly, determine the rate of development of the disease.

Who needs to donate blood to RW?

What kind of testing is already clear, but for whomis such an analysis mandatory? Naturally, it is carried out with the slightest suspicion of the presence of syphilis. For example, blood must be given to patients with a rash on the mucous membranes and skin of unknown origin, with uncharacteristic secretions from the reproductive system.

The blood test for RW, for HIV is carried out afteraccidental unprotected sexual intercourse, rape, etc. Such a study is mandatory for patients preparing for hospitalization. It is also recommended when planning a pregnancy. By the way, pregnant women also carry out this testing, since syphilis in this case is extremely dangerous not only for the mother, but also for the child.

This study is also mandatorypart of the medical examination for employees of certain professions, in particular, cooks, hairdressers, cosmetologists, medical staff, etc. The analysis is also conducted regularly to patients with syphilis (including congenital forms) to determine if there is an effect from the treatment.

How to prepare for blood donation?

Blood for laboratory tests is taken from the vein.For the reliability of the results, the test should be properly prepared. First, it is worth noting that the delivery of blood to RW is performed on an empty stomach (the last meal should be 6-12 hours before the analysis). That's why the procedure is usually prescribed for the morning time - in most outpatient clinics and laboratories blood sampling is conducted from 7 to 11 am.

Before donating blood, you should never smoke, drink coffee. The day before the procedure, it is necessary to abandon excessively fatty foods and alcoholic beverages, since this can affect the accuracy of the result.

Test result on RW and its value

Naturally, with the results of the analysis you needrefer to the attending physician - the specialist knows exactly what the RW blood is for, what it is. However, general information can be found. If there is no infection, the test will be negative (there will be a “-” sign in the form).

Что же касается положительной реакции, то ее can be viewed in different ways. In the form with the results of a similar state is marked with one, two, three or four pluses. Three or four "+" - this is a positive or even sharply positive reaction, which means - the treatment must be started immediately.

But “+” and “++” can testify asthe presence of the disease, and false positive results. It is recommended to repeat the analysis for such patients. False positive reactions are often observed among alcohol abusers or drug addicts. In addition, serological blood tests may be abnormal with severe inflammation, cancer, infections (for example, with viral hepatitis), as well as during pregnancy and diabetes.