Do you know the purpose of different color blood collection tubes and the order of blood collection?

Do you know the purpose of different color Blood Collection Tubes and the order of blood collection?

A vacuum blood collection tube is a blood collection product that has been clinically used in recent years. During the physical examination, we can see blood collection tubes of different colors, and sometimes multiple tubes are used. If you look carefully you will find that you use different colors every time you see it. Looking at the skilled technique of the nurse, I still don't understand why I drew so much blood all at once. Don't worry, I will tell you how to use the different color blood collection tubes and the order of blood collection.

Red Vacuum blood collection tube, serum tube, and additive-free blood collection tube for routine biochemical and immunological testing.
Dark blue Vacuum blood collection tube for blood concentration and trace element determination.
Orange-red Vacuum blood collection tube, there is a coagulant in the blood collection tube, which can activate the rapid conversion of fibrinogen into fibrin, and is widely used in emergency series detection.

Yellow Vacuum blood collection tube, inert separation gel for coagulation tube, centrifuged blood can be directly divided into liquid layer and solid layer.

Green Vacuum blood collection tube and heparin anticoagulation tube containing heparin can play an anticoagulant effect, suitable for hemorheology, blood gas analysis, general biochemical determination, and hematocrit test. Because the tube contains heparin, which interferes with the detection of blood clots and leads to the aggregation of white blood cells, it cannot be used for blood routine, and it is light blue after staining, which is not suitable for morphological examination.
Light green cap for emergency plasma biochemistry.

The purple cap, with EDTA anticoagulation, is also not suitable for coagulation and blood cell testing.
Light blue cap, sodium citrate anticoagulation, can do coagulation diagnosis and thrombus screening.

Blackcap, used for ESR experiments.
Grey cap for blood sugar testing.

The blood collection sequence is usually first blood culture tubes or blood culture bottles, then red or dark blue ones without any additives, followed by light blue blood coagulation tubes, and finally blood collection tubes containing various other anticoagulants.

Only by really paying attention to quality control before analysis can we ensure the accuracy and reliability of the test results. In many cases, the laboratory department uses instruments to detect certain items and finds abnormal results. After re-examination, there are no problems with quality control and equipment and reagents. The patient is asked, and the clinician has no influence on the past medical history and medication history. The order of the blood draw was accidentally wrong, which affected the results, and the problem was solved after redrawing the blood. It can be seen how important quality control from the source is, and it affects the whole body.

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