Sputum Evaluation (and Sputum Induction)
What is the test?
If your doctor thinks you have pneumonia, he or she might examine a sample of your sputum, the phlegm that you cough out of your lungs, to try to determine what type of bacteria or other infectious agent might be the cause.
How do I prepare for the test?
Drink plenty of fluids the night before the test; this may help to produce a sample.