volume
(vol'yŭm 
, vol'ūm‵)
[L. volumen, roll of sheets]
The space occupied by a substance, usually a gas or liquid. Liquid volume is expressed in liters or milliliters; gas volume in cubic centimeters.
case v.The number of patients or procedures managed per year.
ABBR: CTV
In radiation therapy, the grossly detectable tumor volume plus any microscopic tumor that extends outward from the grossly involved margins. The objective in radiation oncology is to treat the visible tumor and the surrounding margins adequately to destroy as many malignant cells as possible.closing v.The amount of gas remaining in the lung when the small airways close during a maximum expiratory effort. It is increased in patients with small airway disease.
compressed v.The portion of the mechanically delivered tidal volume that is not delivered to the patient owing to expansion of the ventilator circuit with pressure. Tubing with a high compliance increases the compressed volume, esp. when the tidal volume is delivered under high pressure.
compressible v.During mechanical ventilation, the volume lost during distension of the ventilator circuit which does not contribute to the patient's ventilation.
expiratory reserve v.The maximal amount of air that can be forced from the lungs after normal expiration.
ABBR: FEV
The volume of air that can be expired after a full inspiration. The expiration is done as quickly and forcibly as possible. During spirometry the volume exhaled after each second or fraction of a second is abbreviated: FEV 12, FEV 1, FEV 2, and FEV 3. The FEV provides valuable information concerning the ability to expel air from the lungs, esp. the presence of obstructive lung disease.gastric residual v.The quantity of fluid present in the stomach of a patient receiving enteral nutrition by a feeding tube.
gross tumor v.The demonstrable extent of a tumor seen or felt with stand ard examination techniques. The gross tumor volume is used in radiation oncology as the basis for initial estimates of the extent of a tumor that will undergo treatment with external beam radiation or brachytherapy.
hospital v.The number of cases of specific conditions (such as stroke, acute myocardial infarction, or organ transplantation) treated at an inpatient facility. Morbidity and mortality are typically lowest in treatment centers where professional staff has the greatest clinical experience.
inspiratory reserve v.The maximal amount of air that can be inhaled after a normal inspiration.
ABBR: MCV
The mean volume of an average erythrocyte. Normal values range from 82 to 92 cubic micrometers.minute v.The volume of gas expired or inspired per minute in quiet breathing, usually measured as expired ventilation.
plasma v.The total quantity of plasma in the body, within the vascular space. It decreases with dehydration and increases with greater salt and water intake and during early pregnancy.
ABBR: RV
The volume of air remaining in the lungs after maximal expiration.residual urine v.Postvoid residual.
stroke v.The amount of blood ejected by the left ventricle at each heartbeat. The amount varies with age, sex, and exercise but averages 60 to 80 mL.
ABBR: VTG
The volume of gas contained within the chest during body plethysmography when the mouth shutter is closed. This measurement is a rough estimate of the functional residual capacity of the lung.tidal v.The volume of air inspired and expired in a normal breath.