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  2. Respiratory inductance plethysmography - Wikipedia

    en.wikipedia.org/wiki/Respiratory_inductance_ple...

    Dual band respiratory inductance plethysmography can be used to describe various measures of complex respiratory patterns. The image shows waveforms and measures commonly analyzed. Respiratory rate is the number of breaths per minute. A non-specific measure of respiratory disorder. Tidal volume (Vt) is the volume inspired and expired with each ...

  3. Spirometry - Wikipedia

    en.wikipedia.org/wiki/Spirometry

    TLC: 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.)

  4. Airway resistance - Wikipedia

    en.wikipedia.org/wiki/Airway_resistance

    Where V is the lung volume at which G AW was measured. Also called volumic airway conductance. Similarly to specific airway resistance, specific airway conductance attempts to correct for differences in lung volume. Specific airway conductance is often measured at FRC, in which case: = [3]

  5. 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

  6. Spirometer - Wikipedia

    en.wikipedia.org/wiki/Spirometer

    A spirometer measures ventilation, the movement of air into and out of the lungs. The spirogram will identify two different types of abnormal ventilation patterns, obstructive and restrictive. There are various types of spirometers that use a number of different methods for measurement (pressure transducers, ultrasonic, water gauge).

  7. Ventilation/perfusion ratio - Wikipedia

    en.wikipedia.org/wiki/Ventilation/perfusion_ratio

    The actual values in the lung vary depending on the position within the lung. If taken as a whole, the typical value is approximately 0.8. [4] Because the lung is centered vertically around the heart, part of the lung is superior to the heart, and part is inferior. This has a major impact on the V/Q ratio: [5] apex of lung – higher; base of ...

  8. Respiratory pressure meter - Wikipedia

    en.wikipedia.org/wiki/Respiratory_pressure_meter

    Respiratory pressure meter. Measuring respiratory muscle strength is a long-established method of assessing the mechanics of breathing. Respiratory muscle dysfunction (i.e., reduced strength or endurance) should be distinguished from lung function abnormalities and measured separately.

  9. Helium dilution technique - Wikipedia

    en.wikipedia.org/wiki/Helium_dilution_technique

    The helium dilution technique is the way of measuring the functional residual capacity of the lungs (the volume left in the lungs after normal expiration). This technique is a closed-circuit system where a spirometer is filled with a mixture of helium (He) and oxygen. The amount of He in the spirometer is known at the beginning of the test ...