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Order Code CH280
Turnaround Time 24 hours
Test Includes


Specimen Requirements
Specimen Source
Whole Blood
Transport Container
(Specimen Container)

Lavender (K2-EDTA)

Preferred Specimens
Whole Blood (EDTA)
Minimum Volume (uL)
minimum fill line on tube
Collection Instructions
(Transport Temperature)
Specimen Stability
Temperature Period
Room temperature 7 hours
Refrigerated 24 hours
Frozen 30 days
Test Details
fluorescence immunoassay
Clinical Significance

BNP is a hormone that the heart produces, mainly in the left ventricle, to help regulate blood circulation. BNP levels rise when the heart is stretched or stressed by fluid overload or injury. BNP works to keep the blood vessels widened, or dilated, and to stimulate the kidneys to excrete salt and water, or natriuresis. This reduces the blood volume and pressure and protects the heart from overload.

Reference Ranges

<100 pg/mL