•Propeptide of Brain Natriuretic Peptide
Support a diagnosis of congestive heart failure (CHF)
Serum (preferred) or plasma
Red-top tube, gel-barrier tube, green-top (lithium heparin), or lavender-top (EDTA) tube
If a red-top tube or plasma is used, separate serum or plasma to a plastic transport tube.
Room temperature. Stable at room temperature, or refrigerated for three days and frozen for 12 months.
Citrate plasma specimen; grossly hemolyzed samples; improper labeling.