Blood Tests: Why do They Take Multiple Tubes of Blood?

release time:2021-12-17 15:26:02

Regular blood tests are one of the most important ways to track your overall health. Getting tested regularly allows you to understand the way your body changes over time and allows you to make informed decisions about your health. But why does a blood test require several tubes of blood to be drawn?

Why do They Take Multiple Tubes of Blood

1. Backup

Many items require different instruments to test. A certain amount of blood is consumed to test for different items. A small amount can lead to inaccurate results or failure to produce results. Drawing an excessive amount of blood will ensure that there is enough for retesting in case of abnormal results.

2. Respond to the need to test different items.

Different test items require different colored blood collection tubes. For example, biochemical tests require red-tipped or yellow-tipped tubes, routine blood tests require purple-tipped tubes, and coagulation tests require blue-tipped tubes. Therefore, it is not possible to use the same blood tube for all the tests. Even though some tests can be performed in the same tube, the same tube of blood can be taken from one laboratory to another and can easily be contaminated and confused. This can seriously affect the test results.

3. It is more convenient and faster

The blood volume of a normal person is between 4000-5000ml. It takes about 2-3ml to draw a tube of blood, and according to the routine calculation of 5 tubes, the blood drawn is less than one percent of human blood. Except in special cases, the amount of blood drawn for a medical examination is not likely to have an effect on the patient's normal physiological condition.

In order to solve the problem of using only a small amount of blood to test routine biochemical items, Seamaty developed and produced a portable automatic dry biochemistry instrument, SD1.

The SD1 is a fully automatic dry biochemistry analyzer that combines routine biochemistry, coagulation, electrolytes and some immune tests into one biochemical analysis system. It can test liver function, kidney function, cardiac muscle, glycolipid, electrolytes and other items. It is also possible to perform multiple tests in the plate with only 100 µl of sample.

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