Breath Odor Detection Based on Electronic Olfaction for Medical Diagnosis

Abstract

Prevention strategy is nowadays the main way in the complex issue of medical diagnosis. Analysis of expired human breath is valuable because it can be monitored noninvasively and provides information about the chemical and physiological state of the entire body. Chemical compounds from the human body are important indicators that can be used to diagnose human diseases. Volatile compounds that can be recognized by the human nose have been used for medical diagnoses since ancient times. Electronic noses are array of partially selective chemical sensors. By analyzing the breath odor by the E-nose asthma diagnosis can be possible. Nitric oxide is bio marker for the asthma. As per the research NO ranges in the exhaled breathe is 22 to 44 ppb for in normal asthmatic condition. We have done the testing for different concentration of NO like, for 35ppm of NO sensor gives 10mv, for 20 ppm 7mv and for 10 ppm 2mv output. So by taking this output as a reference one can declare that patient is asthmatic or not. So Breath odor is detected by the sensor and that can be used for the diagnosis purpose.