It gives me a great  pleasure to put forth this 5th edition of capnography website. Unprecedented encouragement from medical professionals, engineers, technological innovators, and students across the world gave me a sense of satisfaction that long hours spent in the initial designing and deployment of earlier editions of this website did not go futile. It is heartening to state that over 150,000 personnel visit this site annually.  During the last few years, this website was able to fulfill its goals and objectives as an avenue to provide dynamic, animated, interactive and up-to-date information on capnography that is easily and readily accessible to everyone without the hassle of passwords. In addition, it is also serving as a forum for active discussion on all issues related to capnography in all medical fields as visualized in the number of e-mails being received on this subject. 

E-mails also suggested that the use of multimedia programs, digital images, and clip arts, and real-time animations, that convey the complex physical, physiological and clinical principles underlying capnography, had a great impact on viewers in facilitating easy understanding. A review in the 'Journal Anesthesiology, October 2001, described this website to be equivalent to a dynamic text book on capnography. Subsequent years have proved this prediction to be correct. Unlike a textbook, this site undergoes frequent updates on monthly basis to reflect current understanding and concepts of capnography. This  website also has been ranked as number 'one' (most popular website) in capnography related search material by all major search engines. 

The highlight of the fifth edition, among others, is the newly added sections "capnography in postoperative period, capnography in emergency medicine, and capnography in emergency intubation". These sections will enable readers to understand the current and future role of capnography in these circumstances.

Bhavani Shankar Kodali MD