How many times do you invert a sst tube?

A serum separator tube (SST) should typically be inverted gently 5 to 10 times after collection. This ensures proper mixing of the blood with the gel and clot activator, promoting optimal separation of serum during centrifugation. It's important not to shake the tube vigorously, as this could cause hemolysis of the sample. Always follow specific guidelines provided by the manufacturer or laboratory protocols.