Checking out “positive” is not necessarily a bad thing

We do daily physical examinations or physical uncomfortable blood tests. When the test results come out, there will always be some items showing “positive” or rising. Some people think that “positive” means there are problems, anxiety, panic, fear and so on. On the heart. In fact, the positive meaning of different items does not mean that the body has a disease. Liang Shuhui, deputy director of the Laboratory of the First Affiliated Hospital of Guangzhou University of Traditional Chinese Medicine, will help you interpret the “positive” indicators in the medical report.

Good “positive”: protective antibody

This situation is mainly seen in the presence of antibodies that have protective effects on the human body, such as hepatitis B surface antibodies. After injecting hepatitis B vaccine or hepatitis B virus into the human body, if the human body has sufficient immunity, the virus will be killed, and the characteristics of hepatitis B virus will be recorded to produce hepatitis B surface antibody. The test result is positive for hepatitis B surface antibody. After the hepatitis B surface antibody is produced, if hepatitis B virus invades the human body, the previously produced hepatitis B surface antibody neutralizes the virus, so that the virus cannot infect the human body. The appearance of these protective antibodies indicates that the human body is immune to the virus and the body is healthy. However, over time, the titer of these protective antibodies will slowly decrease or even disappear. At this time, we need to make up the vaccine to make the antibody positive.

Bad “positive”: more common in tumor markers

Some test items are positive for doctors and patients, which reminds us of further examinations, such as Epstein-Barr virus IgA antibody, alpha-fetoprotein, carcinoembryonic antigen. These are currently there are evidence that the tumor is more relevant to the test, such as Epstein-Barr virus IgA antibody and nasopharyngeal carcinoma are more relevant, alpha-fetoprotein levels are significantly increased is an important signal for hepatocellular carcinoma, cancer Elevation of embryonic antigen is an important reference for the diagnosis of colorectal cancer. Once these indicators are positive, they are prompted for further examination.

Only need to review the “positive” regularly: Helicobacter pylori urease antibody, anti-nuclear antibody, etc.

Some examination items also have a certain positive rate in normal human bodies, such as Helicobacter pylori urease antibody and anti-nuclear antibody. Antinuclear antibodies are antibodies produced by humans against their own cells. Patients with many autoimmune diseases such as systemic lupus erythematosus, Sjogren’s syndrome, and rheumatoid arthritis will be positive for antinuclear antibodies. Will be higher. However, normal people also have anti-nuclear antibody positive, and with the increase of age, the proportion of positive will also increase, the anti-nuclear antibody in the elderly has a positive rate of 2% to 4%, but the titer is low. If there is no corresponding clinical symptom, only the indicators of these items show positive, and the titer is low, you don’t have to panic, just check it regularly.

Prompt for the “positive” found in the cause: pathogen

If the body is uncomfortable and suspected to be a certain pathogen infection, if the pathogen test result is positive, the cause of the infection is found, and targeted treatment can be performed. For example, in Guangzhou, the weather changes greatly in spring and winter, children’s immunity is low, and respiratory infections are most likely to occur. There are many types of pathogens causing respiratory infections, which may be viruses, mycoplasma, chlamydia, etc. In this case, the cause is found. When a child has symptoms of respiratory infection such as fever or cough, if the blood test results are “positive Mycoplasma pneumoniae IgM antibody” or “Respiratory syncytial virus IgM antibody positive”, it indicates that the infection may be caused by Mycoplasma pneumoniae. Or it is caused by respiratory syncytial virus infection, the cause is found, and it is easy to cure because of treatment.

In short, the positive results are different from the different interpretations of the project. In the face of “positive” tension, the situation is clearly defined.