Washington: Blood and urine have routinely been analysed in order to obtain hints for infectious and metabolic diseases, and to diagnose cancer and organ failure.Researchers at ETH Zurich and at the University Hospital Zurich now propose to extend such analyses to breath, and in particular to take advantage of modern high-resolution analytical methods that can provide real-time information on the chemical composition of exhaled breath.The scientists developed an instrument-based version of a principle that has been known for a long time in traditional Chinese medicine: TCM doctors draw conclusions about the health state of a patient based on the smell of the exhaled breath.It is also known that trained dogs and rats can distinguish the smell of the breath of people suffering from certain variants of cancer.
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