What are the tests for pulmonary edema?

Auscultation & x-ray. Edema in the lungs alters the breath sounds on examination with a stethoscope, auscultation. Chest x-ray also reveals pulmonary edema due to alteration in the shadows of the lung. Lab tests to distinguish between edema and pneumonia may include crp, bnp and in rare cases examination of brochopulmonary fluid.