Abstract
Human exhaled breath contains nitrogen (about 78%), oxygen (16%), carbon dioxide (4%-5%, hydrogen (5%), and water vapor. Besides, in the case of a healthy person...
Highlights
Human exhaled breath contains nitrogen, oxygen (16%), carbon dioxide (4%-5%, hydrogen (5%), and water vapor
The potential of various semiconductor chemical resistors made from metal oxide semiconductors to diagnose disease has been reviewed
Many volatile metabolites were determined by these methods in explosives, many of which are used as markers of inflammation
Summary
Human exhaled breath contains nitrogen (about 78%), oxygen (16%), carbon dioxide (4%-5%, hydrogen (5%), and water vapor. In the case of a healthy person, the exhaled air contains rather small concentrations of nitric oxide NO, ammonia NH3, carbon monoxide CO, hydrogen dioxide H2O2 and sulphide H2S as well as ethanol, acetone, etc. A remarkable increase in the concentration of last gases indicates the presence of various diseases in the patient. The metabolic excreted products diffuse into the inhaled air though the alveoli in the lungs and the air is rejected. A multi-component gas mixture formed, which accumulates first in the alveolus of the lungs. Today the medical doctor polls and examines the patient and sends it to the lab-tests of blood, urine, perform an electrocardiogram, etc. For example, today’s periodic monitoring of glucose concentrations in the blood induces acute pain, risk of virus (e.g., hepatitis B) infection from needles, and other difficulties infrequent monitoring
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