what comes first serum or gel
When checking their bodies in hospitals, many people go through the process of blood testing, mainly because the blood contains serum and plasma, which provide organic substances for the body. Once there is a disease, they first undergo changes, which is also the basis for effective judgment by medical staff. However, blood testing items are not always single and unchanging, and the requirements for different testing items vary. For example, for erythrocyte sedimentation rate testing, green heparin test tubes are required, while for routine serum testing, serum separation gel yellow tubes are required.
The yellow serum separation tube is the most widely used in clinical practice, as it can efficiently extract serum samples and obtain accurate detection reports in a short period of time. But in the actual operation process, sometimes it is found that the position of serum and glue is prone to change. What is this? Which one is on top?
1、 Performance of serum separation gel
Firstly, to accurately determine which separation gel is on top of the serum, it is necessary to fully understand the performance of the separation gel. As a hydrophobic organic compound, it is not only physiologically inert, but also has thixotropy and accurate specific gravity. When centrifugation is not carried out, it is generally located at the bottom of the test tube. But when the blood enters the tube and is completely coagulated, it is placed in a centrifuge. Due to its specific gravity ranging from 1.045 to 1.065g/cm3, while the serum has a specific gravity ranging from 1.026 to 1.031 g/cm3 and the blood clot has a specific gravity ranging from 1.090 to 1.095 g/cm3, the sequence presented after centrifugation and flipping should be that the serum is above the separation gel and the blood clot is at the bottom.
2、 The role of separation gel under serum
Due to the performance of the separation gel and the effect of external centrifugal force, it is located between the serum and the blood clot, which can effectively prevent the interaction behavior between blood cell components, ensure the stability of the serum sample, and also improve the efficiency of sample collection and the quality level of sample processing.
3、 The reason why the separation gel appears above the serum
Under normal circumstances, serum is always above the separation gel, but sometimes there may be cases where the serum flips below the separation gel. Why is this? In fact, this is related to its specific gravity. Accurate control of the specific gravity must be between the serum and blood cells. If it is too large or too small, it can lead to poor flipping or the situation where blood and separation gel are intertwined.
Based on the above introduction, I believe everyone already knows the location of serum and separation gel. The most important thing in the operation process is to ensure the reliable quality of the separation gel. As a professional manufacturer of serum separation gel, Desheng has been carefully researched and developed since its establishment, with precise formulation of key values, excellent flipping performance, and almost no poor separation effect. If you have any needs, please click on the website to inquire about details and purchase!
