Child mortality is high among preterm newborn infants. They are often affected by free gas in lungs and intestines, which may lead to the breakdown of vital organs. The current diagnosis is based on X-ray radiography. According to a study a bed-side, rapid, non-intrusive, and gas-specific technique for in vivo gas sensing would improve diagnosis and enhance the babies' chance of survival. The detection method is based on laser spectroscopy
[ 51 ]Surgical smoke occurs during the use of certain surgical instruments, such as lasers, drills or ultrasonic scalpels. It consists of several toxic and carcinogenic gases. Though detected in uncritical concentrations, these gases carry a health risk. Laser based spectroscopy offers a possibility to analyze even lowest exposures
[ 43 ]Ammonium is used as a biomarker for helicobacter pylori infections. These infections are responsible for stomach ulcers. Breath analysis diagnoses the disease in a non-invasive way sparing patients a disagreeable gastroscopy.
[ 63 ]The relatively new research field of breath analysis defines CO concentration in exhaled breath as a biomarker for e. g. respiratory infections and asthma.
[ 63 ]Formaldehyde has been used in consumer and industrial products since the beginning of the 19th century. Currently the annual formaldehyde production accounts for 21 million tons. About 50 % are processed as adhesives in pressed wood panels. In 2004 formaldehyde has been classified carcinogenic by the International Agency for Research on Cancer. Since then formaldehyde concentrations have been strictly controlled in the production process as well as in the finished product. Laser-based measurement systems are required to detect the maximum levels of 0.01 ppb (USA) and 2 ppb (EU).
[ 143 , 114 , 108 , 78 , 22 , 9 ]