====== B-type Natriuretic Peptide ======

  * Abbreviated as **BNP**
  * Sometimes **proBNP** or **NT-proBNP** is measured instead, which stands for **N-terminal prohormone of brain natriuretic peptide**

  * This is a venous blood test without the need for fasting.

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===== Reference Ranges =====

Different instruments have different reference ranges, and even with the same instrument there may be slight variation between calibrations. You should always use the reference ranges that come with the lab results. 

==== Normal Level ====

=== NT-proBNP ===

^ Age ^ Level ^
^ 0--74 years | < 125 pg/mL |
^ 75--99 years | < 450 pg/mL |

==== Elevated Level ====

=== NT-proBNP ===

In patients with heart failure, the following values may mean decompensation.

^ Age ^ Level ^
^ 0--49 years | > 450 pg/mL |
^ 50--99 years | > 900 pg/mL |

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===== References =====

  * Cleveland Clinic. [[https://my.clevelandclinic.org/health/diagnostics/16814-nt-prob-type-natriuretic-peptide-bnp|NT-proB-type Natriuretic Peptide (BNP)]]. Last updated 2019-04-25 and retrieved on 2020-02-17.