Carbon dioxide in the respired gases gives evidence of life processes and the adequacy of breathing. The amount and concentration of the gas in the breath can be measured and monitored with instruments called capnographs, which are used whenever and wherever the breathing of a patient might be affected by disease or treatment. The book deals not only with the clinical application of these devices but also with the basic physiology of the generation and transport of carbon dioxide in the body. A technical section describes how the instruments work and a unique section tells the history of capnography. Over 40 contributors cover these aspects in the book, which has been edited by three experts in the field.