| inspiratory reserve volume | The extra volume of air that can be inspired with maximal effort after reaching the end of a normal, quiet inspiration. Common abbreviation is irv. (12 Dec 1998) |
|---|---|
| forced expiratory volume | Measure of the maximum amount of air during a forced vital capacity determination that can be expelled in a given number of seconds. It is usually given as fev followed by a subscript indicating the number of seconds over which the measurement is made, although it is sometimes given as a percentage of forced vital capacity. (12 Dec 1998) |
| inspiratory | Relating to or timed during inhalation. (05 Mar 2000) |
| inspiratory capacity | The maximum volume of air that can be inspired after reaching the end of a normal, quiet expiration. It is the sum of the tidal volume and the inspiratory reserve volume. Common abbreviation is ic. (12 Dec 1998) |
| inspiratory centre | The region of the medulla oblongata that is electrically active during inspiration and where electrical stimulation produces sustained inspiration. (05 Mar 2000) |
| inspiratory stridor | A crowing sound during the inspiratory phase of respiration due to pathology involving the epiglottis or larynx. (05 Mar 2000) |
| forced | Done or produced with force or great labour, or by extraordinary exertion; hurried; strained; produced by unnatural effort or pressure; as, a forced style; a forced laugh. Forced draught. See Draught. Forced march, a march of one or more days made with all possible speed. Source: Websters Dictionary (01 Mar 1998) |
| forced alimentation | Giving liquid food through a nasal tube passed into the stomach, forcing a person to eat more food than desired. Synonym: forced alimentation. (05 Mar 2000) |
| forced beat | <cardiology, physiology> An extrasystole supposedly precipitated in some way by the preceding normal beat to which it is coupled, an extrasystole caused by artificial stimulation of the heart. Synonym: dependent beat. (05 Mar 2000) |
| forced cycle | <cardiology, physiology> A cardiac cycle (atrial or ventricular) that is cut short by a forced beat. (05 Mar 2000) |
| forced duction | A manoeuver to determine whether a mechanical obstruction is present in the eye; with forceps grasping an eye muscle, an attempt is made to passively move the eyeball in the direction of restricted rotation. Synonym: passive duction. (05 Mar 2000) |
| forced expiratory flow | Expiratory flow during measurement of forced vital capacity; subscripts specify the exact parameter measured, e.g., peak instantaneous flow, the instantaneous flow at some specified point on the curve of volume expired versus time, or on the flow-volume curve, the mean flow between two expired volumes. (05 Mar 2000) |
| forced expiratory flow rates | Measurements of rates of airflow during a forced vital capacity determination. (12 Dec 1998) |
| forced expiratory time | The time taken to expire a given volume or a given fraction of vital capacity during measurement of forced vital capacity; subscripts specify the exact parameters measured. (05 Mar 2000) |
| forced feeding | Giving liquid food through a nasal tube passed into the stomach, forcing a person to eat more food than desired. Synonym: forced alimentation. (05 Mar 2000) |