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  2. Bronchoscopic lung volume reduction - Wikipedia

    en.wikipedia.org/wiki/Bronchoscopic_lung_volume...

    Bronchoscopic lung volume reduction (BLVR) is a procedure to reduce the volume of air within the lungs. BLVR was initially developed in the early 2000s [ 1 ] [ 2 ] as a minimally invasive treatment for severe COPD that is primarily caused by emphysema .

  3. FEV1/FVC ratio - Wikipedia

    en.wikipedia.org/wiki/FEV1/FVC_ratio

    In obstructive lung disease, the FEV1 is reduced due to an obstruction of air escaping from the lungs. Thus, the FEV1/FVC ratio will be reduced. [4] More specifically, according to the National Institute for Clinical Excellence, the diagnosis of COPD is made when the FEV 1 /FVC ratio is less than 0.7 or [8] the FEV 1 is less than 75% of predicted; [9] however, other authoritative bodies have ...

  4. Collateral ventilation - Wikipedia

    en.wikipedia.org/wiki/Collateral_ventilation

    The presence of interlobar collateral ventilation will affect the choice of lung volume reduction procedure that may be offered in severe cases of emphysema. Emphysema usually develops in later years from the breakdown of alveolar walls resulting in much larger airspaces and much larger pathways for a preferential route of collateral ventilation.

  5. Endobronchial valve - Wikipedia

    en.wikipedia.org/wiki/Endobronchial_valve

    This leaves the rest of the lung to expand more normally and avoid air-trapping. Endobronchial valves are typically implanted using a flexible delivery catheter advanced through a bronchoscope in minimally invasive bronchoscopic lung volume reduction procedures in the treatment of severe emphysema. The valves are also removable if they are not ...

  6. Lung volumes and capacities - Wikipedia

    en.wikipedia.org/wiki/Lung_volumes_and_capacities

    Lung volumes and lung capacities are measures of the volume of air in the lungs at different phases of the respiratory cycle. The average total lung capacity of an adult human male is about 6 litres of air. [1] Tidal breathing is normal, resting breathing; the tidal volume is the volume of air that is inhaled or exhaled in only a single such ...

  7. Emphysema - Wikipedia

    en.wikipedia.org/wiki/Emphysema

    Lung volume reduction may be offered to those with advanced emphysema. When other treatments fail, and the emphysema is in the upper lobes, a surgical option may be possible. [ 49 ] A number of minimally invasive bronchoscopic procedures are increasingly used to reduce lung volume.

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  9. Pulmonary function testing - Wikipedia

    en.wikipedia.org/wiki/Pulmonary_function_testing

    Total lung capacity: the volume in the lungs at maximal inflation, the sum of VC and RV. TV: Tidal volume: that volume of air moved into or out of the lungs in 1 breath (TV indicates a subdivision of the lung; when tidal volume is precisely measured, as in gas exchange calculation, the symbol TV or V T is used.) RV