What causes high white blood cell count in blood routine test?

A routine blood test is a relatively simple and quick test item, which is an important basis for the diagnosis of many diseases. Normally, the test results of routine blood tests in different hospitals will not differ too much. There may be slight differences due to different instrument models, but basically it will not affect the diagnosis of the disease. The results of a routine blood test will give two columns for each item: test results and reference values. We can also judge whether the results are within the normal range based on the reference values ​​at the back. Any high or low value indicates that there are certain problems with your health. Next, we will answer the question regarding high white blood cell count in blood routine test.

Some items are not commonly used. Here are some of the most common clinical significances (corresponding to the serial numbers in the figure):

1. White blood cell count (WBC): Usually the most commonly used meaning of white blood cell count is that its increased value indicates possible infection. In addition, other diseases such as leukemia may also increase its value. Its decrease may be aplastic anemia, hypersplenism, typhoid and paratyphoid, severe sepsis, etc.

2. Hemoglobin (Hb) 3. Red blood cell count (RBC): These two items are combined to see whether anemia exists, with Hb as the main basis for judgment. The results of the following 15 to 20 items are used to indicate the type of anemia (such as microcytic normochromic anemia, and the treatment plans for different types of anemia are very different).

3. Platelet count (PLT): A value greater than the normal value indicates a hypercoagulable state, which means it is more likely to form blood clots than normal blood. A value less than the normal value indicates a hypocoagulable state, which means there is a tendency to bleed. For example, patients with Henoch-Schonlein purpura need to pay more attention to this value. In addition, combined with the coagulation function test, if there is an indication of severe bleeding tendency, surgery cannot be performed, including various punctures and interventions.

4. Neutrophil count 6. Neutrophil ratio. When the two are combined, an increase in neutrophils generally indicates that the infection is likely to be bacterial, but in addition, other diseases such as myeloid leukemia can also cause it to increase.

5. Lymphocyte count 8 and lymphocyte ratio should be considered together. If the lymphocyte count increases, it may be viral or lymphocytic leukemia if it is caused by infection. If the lymphocyte count decreases, it may be due to immunosuppression.

6. Eosinophil count 10. Eosinophil ratio is less commonly used than the previous ones. Its elevated value indicates the possibility of parasitic infection.

For those above that have both "count" and "ratio", we usually look at the ratio at first glance. However, sometimes if one type of blood cell is extremely high, the ratio of other cells will decrease, but the count value of the latter may still be normal. Therefore, the "count" and "ratio" should be viewed together.

In addition, each item is not isolated, and sometimes multiple items need to be combined to be meaningful. In addition, the test results may have different meanings depending on the patient's gender and age.

Finally, the disease cannot be confirmed based on the test results. The most important thing is to combine it with the medical history. For the same decreased Hb, some patients may have anemia due to excessive and frequent menstruation, some patients may have hidden gastrointestinal bleeding, and some patients may have aplastic anemia.