An introductory story of breath diagnosis: Past, present and future

Abstract

Some parts of metabolic chemicals in the body are exhaled into the breath. The exhaled breath may express metabolic conditions. In an earlier age, a doctor's nose diagnosed several human diseases. Cancer screening tests have been developed using odor material with canine scent detection. This news strongly suggested that breath diagnosis is not a dream. The collaboration of analytical engineers and clinicians for breath research will realize breath diagnoses in the near future.