Overview
SSTs (Serum Separator Tubes) are widely used in clinical testing and biochemical analysis for collecting and storing blood samples. They are designed to efficiently separate serum or plasma from blood cells, providing a pure sample for subsequent analysis.
Key Component: Serum Separation Gel
- Physical Properties: The serum separation gel is a gel-like substance with a specific density and viscosity. Its density is between serum and blood cells, allowing it to naturally form a clear boundary between them during centrifugation.
- Chemical Stability: The gel must be chemically stable and physiologically inert, meaning it does not react with blood components or release harmful substances, ensuring sample safety and reliability.
- Biocompatibility: The gel should have good biocompatibility, causing no adverse effects on blood cells or biomolecules, such as hemolysis, coagulation, or other reactions, thereby ensuring sample quality and analyzability.
Mechanism of Action
- Blood Sample Collection: After blood is collected into an SST, it is allowed to sit for a period before being placed in a centrifuge.
- Centrifugation: During centrifugation, the serum separation gel forms a physical barrier in the tube, separating the serum or plasma from the blood cells.
- Sample Clarity: This process results in a clear separation of serum or plasma, greatly improving sample processing efficiency and reducing the time and workload required for sample preparation.
Advantages
- Rapid Separation: The serum separation gel quickly separates serum from blood cells, enhancing sample processing efficiency, which is crucial for clinical tests requiring rapid results.
- Sample Stability: The gel prevents material exchange between serum or plasma and blood cells, maintaining sample stability and reducing the impact of hemolysis, coagulation, and other interfering factors.
- Automation Compatibility: The presence of the gel allows for rapid sample extraction and direct use in automated analysis instruments, reducing the need for additional sample processing steps and the potential for human error.
Applications and Considerations
- Clinical Testing: SSTs are used for various clinical tests, such as biochemical indicators, immune analysis, and more.
- Selection of Gel Type: Different experimental projects may require different types of serum separation gels. For example, PRP resin gel may be used for extracting platelet-rich plasma.
- Storage and Transportation: The performance of serum separation gel can be affected by storage and transportation conditions. Therefore, factors such as storage time, temperature, and transportation method should be considered when selecting the gel.
- Proper Blood Sample Collection: Blood samples should be collected according to correct procedures to avoid contamination and hemolysis.
- Centrifugation Conditions: Centrifugation is crucial for separating serum and blood cells. Appropriate centrifugation conditions should be selected based on the characteristics of the serum separation gel and the sample type.
In summary, SSTs are an important tool in clinical laboratories, enabling efficient separation of serum or plasma from blood cells and providing high-quality samples for subsequent analysis. The serum separation gel within these tubes is a key component that enhances sample purity, simplifies processing, and ensures sample stability and compatibility with automated analysis systems.