- physiologic dead space
- the anatomic dead space plus the alveolar dead space; it reflects nonuniformity of ventilation and perfusion in different parts of the lung.
Medical dictionary. 2011.
physiologic dead space
Look at other dictionaries:
physiologic dead space — noun see dead space … Useful english dictionary
dead space — noun 1. : space that cannot be reached by fire from a given weapon or a given point called also dead ground 2. : the portion of the respiratory system which is external to the bronchioles and through which air must pass to reach the bronchioles… … Useful english dictionary
dead space — n 1) space in the respiratory system in which air does not undergo significant gaseous exchange see ANATOMICAL DEAD SPACE, PHYSIOLOGICAL DEAD SPACE 2) a space (as that in the chest following excision of a lung) left in the body as the result of a … Medical dictionary
alveolar dead space — the difference between physiologic dead space and anatomic dead space, representing the space in alveoli occupied by air that does not participate in oxygen–carbon dioxide exchange (see alveolar ventilation, under ventilation). It varies in… … Medical dictionary
respiratory dead space — the part of either the anatomic or the physiologic dead space that represents a volume of air that does not take part in alveolar ventilation … Medical dictionary
anatomic dead space — the portions of the airway, from the nose and mouth to the terminal bronchioles, in which exchange of oxygen and carbon dioxide does not occur. Cf. physiologic dead s … Medical dictionary
space — Any demarcated portion of the body, either an area of the surface, a segment of the tissues, or a cavity. SEE ALSO: area, region, zone. SYN: spatium [TA]. [L. spatium, room, s.] alveolar dead s … Medical dictionary
Ventilation — The exchange of air between the lungs and the atmosphere so that oxygen can be exchanged for carbon dioxide in the alveoli (the tiny air sacs in the lungs). In pulmonary medicine, a distinction is made between pulmonary and alveolar ventilation.… … Medical dictionary
D — 1. Symbol for the vitamin D potency of cod liver oil, multiples of which (5D, 100D, etc.) are used to designate the vitamin D potency of irradiated ergosterol (viosterol) or other substances; for deuterium; for dihydrouridine in nucleic acid … Medical dictionary
Pulmonary shunt — A pulmonary shunt is a physiological result when the alveoli of the lung is perfused with blood as normal, but ventilation (the supply of air) fails to supply the perfused region. In other words, the ventilation/perfusion ratio (the ratio of air… … Wikipedia
