"We are talking about creating an inexpensive, rapid way of collecting diagnostic information about a patient," Carlos Martinez, an assistant professor of materials engineering at Purdue, said in the statement. "It might say, '... you are metabolizing a specific compound indicative of this type of cancer,' and then additional, more complex tests could be conducted to confirm the diagnosis."
These sorts of breath-analysis tools detect changes in electrical resistance or conductance as a gas--i.e., the patient's breath--passes over sensors. The changes can point to the presence of "biomarkers," substances that serve as red flags for various ailments and physical conditions.
Just plain perfect