These tubes contain an inert gel barrier that separates the serum from the blood clot during centrifugation, preventing contamination of the serum .
For example, in serum certain analytes such as potassium, phosphorus and glucose should be separated from the cells within a few hours - otherwise the results will be significantly impacted. Using BD SSTTM II Advance tubes, routine analytes in clinical chemistry such as potassium are still stable after a week of storage at 2-8ºC . Clinical evaluation of special chemistries such as therapeutic drugs, proteins, peptides, steroids and vitamins demonstrates a high degree of stability within the BD SSTTM II Advance1,2,3 .
BD Vacutainer® SSTTM II Advance tubes enable faster centrifugation times of 5 minutes at 3000 g .
The main advantages of gel tubes versus non-gel tubes are:
Stable barrier between serum and clotted blood during transportation and storage, leading to better analyte stability .
Better sample quality .
Optimisation of the work flow: short centrifugation time, sample processing and archiving in the primary tube .
No requirement for secondary tubes, reducing the possibility of mis-identification.
The minimum recommended clotting time for BD Vacutainer® SSTTM II Advance tubes is 30 minutes .
1300-2000 g for 10 minutes or alternatively, according to the BD study VS 7228 3000 g for 5 minutes at 18-25°C4 .
BD Vacutainer® SSTTM II Advance should be stored at 4-25°C and protected from direct sunlight during storage . Cooling of the tube by or during centrifugation can affect the movement capability of the gel . The optimum separation of serum and coagulated blood is achieved at a temperature of 20-25°C .