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The Bohr equation, named after Danish physician Christian Bohr (1855–1911), describes the amount of physiological dead space in a person's lungs. This is given as a ratio of dead space to tidal volume. It differs from anatomical dead space as measured by Fowler's method as it includes alveolar dead space.
Dead space is the volume of air that is inhaled that does not take part in the gas exchange, ... The Bohr equation is used to measure physiological dead space.
The Shunt equation (also known as the Berggren equation) quantifies the extent to which venous blood bypasses oxygenation in the capillaries of the lung.. “Shunt” and “dead space“ are terms used to describe conditions where either blood flow or ventilation do not interact with each other in the lung, as they should for efficient gas exchange to take place.
It is defined mathematically as the sum of the closing volume and the residual volume. The alveoli lack supporting cartilage and so depend on other factors to keep them open. The closing capacity is less than the Functional Residual Capacity , the amount of gas that normally remains in the lungs during respiration .
The dead space can be determined from this curve by drawing a vertical line down the curve such that the areas below the curve (left of the line) and above the curve (right of the line) are equal. Most people with a normal distribution of airways resistances will reduce their expired end-tidal nitrogen concentrations to less than 2.5% within ...
5 Example Calculation of dead space using Bohr's equation is wrong. 1 comment. 6 Alveolar deadspace is not calculated by Bohr equation. 1 comment. 7 Requested move 22 ...
Image credits: Wichella #8. Can only remember a moment in personal history. I was the last generation in my country to do mandatory military service. And apparently my generation is particularly lazy.
The Bohr radius ( ) is a physical constant, approximately equal to the most probable distance between the nucleus and the electron in a hydrogen atom in its ground state. It is named after Niels Bohr, due to its role in the Bohr model of an atom. Its value is 5.291 772 105 44 (82) × 10 −11 m. [1] [2]