Carbon Monoxide Concentration of Expired Air

Discrimination of smoking status by thiocyanate and cotinine in serum, and carbon monoxide in expired air.

To develop a procedure for maximizing the discrimination of smoking status, the authors analysed parallel samples of thiocyanate and cotinine in serum, and carbon monoxide (CO) in expired air in a cohort of 145 male subjects aged 45-65 years. The sensitivity and specificity were 93% and 82%, 97% and 83%, and 98% and 100% for thiocyanate, cotinine, and CO respectively. The results were not signi...

Expired air carbon monoxide, smoking, and other variables. A community study.

Analysis of the carbon monoxide content of expired air is now a frequently used technique in population studies. Its close correlation with the blood concentration of carboxyhaemoglobin was first demonstrated by Jones, Ellicott, Cadigan, and Gaensler in 1958. Studies in the United Kingdom (Tyrer, 1964) and the United States (Ringold et al., 1962; Goldsmith, Schuette, and Novick, 1963) have show...

A simple method of carbon dioxide estimation in expired air.

A SIMPLE method for the estimation of carbon dioxide in air or gas mixtures containing anaesthetic gases finds many applications in the investigation of anaesthetic problems and in the control of artificial respiration by mechanical respirators. This adaptation of already established techniques utilizes apparatus which may be found in most hospitals. It is rapid, and can be performed at the bed...

Abstinence from smoking and expired-air carbon monoxide levels: lactose intolerance as a possible source of error.

We investigated a possible source of contamination of expired-air carbon monoxide (CO) readings on CO monitors from raised expired-air hydrogen (H2) levels, namely lactose intolerance, the norm in certain ethnic groups. A significant correlation between expired-air CO and H2 readings was observed in four non-smoking lactose maldigesters.

Carbon Monoxide Urban Air Pollution: Cardiac Effects