- 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. 2011.
anatomic dead space
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Dead space (physiology) — Blood gas, acid base, gas exchange terms PaO2 Arterial oxygen tension, or partial pressure PAO2 Alveolar oxygen tension, or partial pressure PACO2 Arterial carbon dioxide tension, or partial pressure PaCO2 Alveolar carbon dioxide tension, or… … Wikipedia
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
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
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
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
capnogram — A continuous record of the carbon dioxide content of expired air. [G. kapnos, smoke, + gramma, something written] * * * cap·no·gram kap nō .gram n the waveform tracing produced by a capnograph * * * cap·no·gram (kapґno gram″) a real time… … Medical dictionary
Airway — The path air follows to get into and out of the lungs. The mouth and nose are the normal entry and exit ports. Entering air then passes through the back of the throat (pharynx), continues through the voice box (larynx), down the trachea, and… … Medical dictionary
nitrogen washout test single breath — the patient inhales a vital capacity s volume of pure oxygen and then slowly exhales. The nitrogen concentration of the exhaled gas is measured over the entire breath and a curve is generated; different parts of the curve represent nitrogen… … 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
