Pulmonary edema laboratory tests: Difference between revisions
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==Laboratory Findings== | ==Laboratory Findings== | ||
Laboratory findings consistent with the diagnosis of pulmonary edema include | Laboratory findings consistent with the diagnosis of pulmonary edema include | ||
===Brain Natriuretic Peptide=== | |||
[[Brain natriuretic peptide|B-type natriuretic peptide]] (BNP) is elevated in the patient with cardiogenic pulmonary edema. A low BNP (<100 pg/ml) makes a cardiac cause very unlikely and is associated with non-cardiogenic pulmonary edema. | |||
===Oxygen Saturation=== | |||
Low oxygen saturation or [[hypoxia]] may be present on [[arterial blood gas]] readings. | |||
{| border="1" | {| border="1" | ||
|+ Differentiation of cardiogenic pulmonary edema and noncardiogenic pulmonary edema | |+ Differentiation of cardiogenic pulmonary edema and noncardiogenic pulmonary edema | ||
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| Usually normal || Peripheral distributions || Usually normal || <18 mmHg || Large elevated || <.7 | | Usually normal || Peripheral distributions || Usually normal || <18 mmHg || Large elevated || <.7 | ||
|} | |} | ||
==References== | ==References== | ||
Revision as of 14:04, 23 February 2018
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Farnaz Khalighinejad, MD [2]
Overview
Laboratory Findings
Laboratory findings consistent with the diagnosis of pulmonary edema include
Brain Natriuretic Peptide
B-type natriuretic peptide (BNP) is elevated in the patient with cardiogenic pulmonary edema. A low BNP (<100 pg/ml) makes a cardiac cause very unlikely and is associated with non-cardiogenic pulmonary edema.
Oxygen Saturation
Low oxygen saturation or hypoxia may be present on arterial blood gas readings.
| Laboratory findings | ECG | CXR | Cardiac enzymes | PCWP | QS/QT | Edema fluid/serum protein |
|---|---|---|---|---|---|---|
| Cardiogenic pulmonary edema | Ischemia/Infarct | Peri-hilar distribution | May be elevated | >18 mmHg | Small elevated | <.5 |
| Noncardiogenic pulmonary edema | Usually normal | Peripheral distributions | Usually normal | <18 mmHg | Large elevated | <.7 |
References