| Message: | Blood collection from the morning to the laboratory computer determination, generally placed at room temperature for 2-3 hours, during which the metabolic activity of cells did not stop, with the extension of storage time, intracellular and extracellular substances transfer. Serum separation gel is a kind of viscous fluid with specific gravity of 1.05, which is between serum (1.02) and blood clot (1.08). Its structure contains a lot of hydrogen bonds. Due to the association of hydrogen bonds, it forms a network structure. This kind of viscous liquid with network structure has thixotropy. When the separation gel and coagulated blood are centrifuged in the same test tube, the network structure will change under the action of centrifugal force The blood clot heavier than the separation glue is transferred to the bottom of the test tube, and the separation glue forms a colloidal isolation layer between the serum and the blood clot, blocking and reducing the channels of blood cells affecting the serum components, so as to play a role in stabilizing the substance in the serum.
However, heparin lithium tube anticoagulation can maintain the integrity of cells, delay the release of myocardial enzymes from red blood cells, and the separation of blood cells after centrifugation has a certain relationship with serum. |
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