![]() Of these two processes, the exhalation of CO 2 is actually the main driver of breathing. The lungs’ most important function is to facilitate gas exchange: supplying oxygen to the bloodstream and extracting and exhaling carbon dioxide (CO 2). Thus it is important that divers know what limitations to pulmonary function occur while diving. Lung conditions are among the most common reasons people fail diving medical examinations - and of course we depend on our lungs for survival. V d V t = P A C O 2 − P e C O 2 P A C O 2 Ī common step is to then presume that the partial pressure of carbon dioxide in the end-tidal exhaled air is in equilibrium with that gas' tension in the blood that leaves the alveolar capillaries of the lung.Diving imposes significant challenges to the respiratory system. ![]() The original formulation by Bohr, required measurement of the alveolar partial pressure P A. The Bohr equation is used to quantify the ratio of physiological dead space to the total tidal volume, and gives an indication of the extent of wasted ventilation. It differs from anatomical dead space as measured by Fowler's method as it includes alveolar dead space. This is given as a ratio of dead space to tidal volume. ![]() The Bohr equation, named after Danish physician Christian Bohr (1855–1911), describes the amount of physiological dead space in a person's lungs. Not to be confused with the Bohr model or the Bohr effect.
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