How to choose different blood collection tubes
As we all know, the most types of specimens tested by the laboratory are blood specimens, and blood collection tubes for blood specimens are also diverse. If they are used incorrectly, they will face the risk of refunding and re-blood collection. How to correctly use blood collection tubes has become a headache for clinicians and nurses. Let me briefly introduce to you today the use of various blood collection tubes.
Before the introduction, there is a little knowledge point that everyone needs to understand, that is, the difference between serum and plasma: adding anticoagulant to the blood to prevent blood from clotting, and the upper liquid separated after centrifugation is plasma, which contains fiber Proteinogen is mainly used for the determination of chemical components and detection of coagulation items. Serum is a liquid that is isolated after natural coagulation of blood in vitro. It does not contain fibrinogen and is mainly used for chemical and immunological tests.
Introduction of various types of blood collection tubes
1.Red head tube
Additive-free dry vacuum tube, without any ingredients such as anticoagulation and accelerating. Use the principle of natural blood coagulation to make blood coagulate, and use it after centrifugation. Mainly used for routine serum biochemistry (liver function, kidney function, myocardial enzymes, etc.), electrolytes (serum potassium, sodium, chlorine, calcium, phosphorus, etc.), thyroid function, drug testing, AIDS testing, tumor marker testing, immune serology Wait.
2, yellow head tube
Such blood collection tubes contain coagulant and separation gel, which can promote blood coagulation as soon as possible and facilitate serum separation. It is often used clinically for the detection of various biochemical items and should be mixed 8 times after blood sampling.
3.Black head tube
Contains sodium citrate anticoagulation tube, which is mainly used for the detection of erythrocyte sedimentation. Such blood collection tubes need to pay attention to accurate blood collection to the mark line, that is, blood: anticoagulant = 4: 1.