physiologic dead space

Meanings

1. The volume of the conducting airways of the lung. This definition became inadequate once the alveolar dead space was described.
2. That volume of air in the lung which does not partake in gas exchange.
3. That volume of air in the lung that does not eliminate carbon dioxide, as defined functionally by the Bohr equation.
4. The sum of the anatomic plus the alveolar dead spaces.
5. The sum of the parallel and the serial dead spaces.