What is the function of the additive lithium heparin in the green blood collection tube?

When blood is drawn in the hospital, you can see all kinds of blood collection tubes, and their caps are also colorful. Why is this set up? Is there any special effect? In fact, each test tube of different color has different substances added inside, and the items to be checked have different functions. Here we will focus on lithium heparin, a green cap blood collection tube additive.

The additives in the green cap blood collection tubes are usually lithium heparin. Because heparin has anticoagulant function, it can prolong the coagulation time of blood samples. It is suitable for red blood cell fragility test, blood gas analysis, hematocrit test, erythrocyte sedimentation rate and general energy biochemical test.??

1. Routine blood collection and testing

Green test tubes containing lithium heparin can be used to test blood and collect plasma. Because of its anticoagulant function, medical staff can separate plasma from blood from biochemical tests. In addition, the blood test can determine whether the patient suffers from liver diseases, such as liver function decline, liver cancer, fatty liver, etc., and can effectively exclude the possibility of such diseases.

2. Biochemical examination

The green test tube added with lithium heparin is a heparin anticoagulation tube. In the early days, heparin sodium was used, but it had some influence when it was used to measure electrolytes. Later, through technical improvement, heparin lithium was usually used in biochemical tests, such as blood potassium test. After centrifugation, the upper plasma was collected for examination.

3. Electrolyte testing and plasma biochemical testing

The addition of lithium heparin and serum separation gel to the green cap can promote the rapid separation of plasma and is an excellent choice for electrolyte testing. It can also be used for routine plasma biochemical testing and emergency plasma biochemical testing such as ICU.

All clinical applications of heparin green capped tubes are completed by supporting analyzers, and the role of lithium heparin is to be used for blood anticoagulation, not directly to detect diseases. Everyone needs to be clear about this.

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