expiratory reserve volume

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.

---

expiratory reserve volume

n. Abbr. ERV

The maximal volume of air, usually about 1000 milliliters, that can be expelled from the lungs after normal expiration. Also called reserve air, supplemental air.

---

expiratory reserve volume (ERV),

the maximum volume of gas that can be exhaled after a resting volume exhalation. See also vital capacity.

---

volume,

n measure of the quantity of space occupied by a substance, such as air.

volume, blood,

n the total amount of blood in the body.

volume, expiratory reserve,

n (reserve air, supplemental air, supplemental volume) the maximum volume that can be expired from the resting expiratory level.

volume, index of blood,

n See blood, volume index of.

volume, inspiratory reserve,

n (complemental air) the maximum volume that can be inspired from the end of tidal inspiration

volume, packed-cell,

n See hematocrit.

volume, residual,

n the volume of air in the lungs at the end of maximum expiration.

volume, stroke,

n See stroke volume.

volume, supplemental,

n See volume, expiratory reserve.

volume, tidal,

n the volume of gas inspired or expired during each respiratory cycle.

---

expiratory

relating to or employed in the expiration of air from the lungs.

---

expiratory center

the nerve center in the descending reticular formation which terminates inspiration and triggers the commencement of expiratory movements.

expiratory groan

a groan with each expiration; usually an expression of severe pain or extreme fatigue.

expiratory reserve volume

the volume of air which the patient can still exhale after the tidal volume has been exhaled.

---

expiratory reserve volume

Lung physiology The maximum volume of air that can be forcibly exhaled after a quiet expiration has been completed from the end-expiratory position. See Lung volumes.