volume /vol·ume/ (vol´ūm) the measure of the quantity or capacity of a substance. Symbol V or V.
end-diastolic volume (EDV) the volume of blood in each ventricle at the end of diastole, usually about 120–130 mL but sometimes reaching 200–250 mL in the normal heart.
end-systolic volume (ESV) the volume of blood remaining in each ventricle at the end of systole, usually about 50–60 mL but sometimes as little as10–30 mL in the normal heart.
expiratory reserve volume the maximal amount of gas that can be exhaled from the resting end-expiratory level. Abbreviated ERV.
forced expiratory volume the fraction of the forced vital capacity that is exhaled in a specific number of seconds. Abbreviated FEV with a subscript indicating how many seconds the measurement lasted.
inspiratory reserve volume the maximal amount of gas that can be inhaled from the end-inspiratory position.
mean corpuscular volume the average volume of erythrocytes, conventionally expressed in cubic micrometers or femtoliters per red cell.
minute volume (MV) the quantity of gas exhaled from the lungs per minute; tidal volume multiplied by respiratory rate.
packed-cell volume (PCV), volume of packed red cells (VPRC) hematocrit.
residual volume the amount of gas remaining in the lung at the end of a maximal exhalation.
stroke volume the volume of blood ejected from a ventricle at each beat of the heart, equal to the difference between the end-diastolic volume and the end-systolic volume.
tidal volume the volume of gas inhaled and exhaled during one respiratory cycle.
min·ute volume (m n t)n. The volume of any fluid or gas moved per minute. |
volume
the space occupied by a substance or a three-dimensional region; the capacity of such a region or of a container.
closing volume (CV)
the volume of gas in the lungs in excess of the residual volume at the time when small airways in the dependent portions close during maximal exhalation. See also closing volume.
volume of distribution
the calculated body space available for distribution of a drug. Abbreviated Vd.
minute volume
the volume of air expelled from the lungs per minute.
volume overload
see heart failure.
packed-cell volume (PCV)
the volume of packed red cells in milliliters per 100 ml of centrifuged blood. See also packed cell volume.
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