A member asked:

Can sputum color change color after you cough it up? ie: go from pink to orange?

A doctor has provided 1 answer

May be: If sputum contains fresh blood and inflammatory exudate, the enzymes in the exudate may breakdown red cell and hemoglobin with a resulting change in color. Sputum would probably need to sit at room temperature for a number of hour to see the change. If sputum is collected for lab tests, it should be delivered to the lab asap.

Answered 6/14/2012

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