Davis’s Laboratory and Diagnostic Tests Online, powered by Unbound Medicine, provides nurses and students access to 400+ test monographs containing reference ranges, indications, patient preparation and result interpretation. Explore these free sample topics:
-- The first section of this topic is shown below --
To assist in diagnosing bacterial infection and risk for developing sepsis.
Serum collected in a gold-, red-, or red/gray-top tube. Plasma collected in a lavender-top (EDTA) or a green-top (lithium or sodium heparin) tube is also acceptable.
(Method: Fluorescence immunoassay)
|Age||Conventional Units||SI Units (Conventional Units × 1)|
|Newborn||Less than 2 ng/mL||Less than 2 mcg/L|
|18–20 hr||Less than 20 ng/mL||Less than 20 mcg/L|
|48 hr||Less than 5 ng/mL||Less than 5 mcg/L|
|3 d–adult||Less than 0.1 ng/mL||Less than 0.1 mcg/L|
|Interpretation||Conventional Units||SI Units|
|Bacterial infection absent or very unlikely||Less than 0.1 ng/mL||Less than 0.1 mcg/L|
|Bacterial infection possible; low risk for development of sepsis||Less than 0.5 ng/mL||Less than 0.5 mcg/L|
|Bacterial infection likely; development of sepsis is possible||0.5–2 ng/mL||0.5–2 mcg/L|
|Bacterial infection very likely; high risk for development of sepsis||2.1–9.9 ng/mL or greater||2.1–9.9 mcg/L or greater|
|Bacterial infection severe; septic shock is probable||10 ng/mL or greater||10 mcg/L or greater|