Table 4.

Constant conditions to be used for plasma samples

Plasma-related preanalytical conditions
PrecentrifugationCollection (primary) tube, full
Collection tube, inverted 5-10 times
Δt contact with cells, following manufacturer's instructions (30-60 min or 15-30 min)
Collection tube, kept closed
Collection tube maintained in vertical position
CentrifugationNo fixed angle rotor
2,000 × g for 10 min (or according to manufacturer's instructions)
PostcentrifugationNo storage at RT, 4°C
  • Abbreviations: RT, room temperature; Δt, delay.