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  2. 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).

  3. Spirometry - Wikipedia

    en.wikipedia.org/wiki/Spirometry

    A modern USB PC-based spirometer. Device for spirometry. The patient places his or her lips around the blue mouthpiece. The teeth go between the nubs and the shield, and the lips go over the shield. A nose clip guarantees that breath will flow only through the mouth. Screen for spirometry readouts at right.

  4. Incentive spirometer - Wikipedia

    en.wikipedia.org/wiki/Incentive_spirometer

    A typical incentive spirometer consists of an inhalation nozzle, which is seen facing toward the camera. The curved plastic on the left is a handle. The piston is in the middle (along with an adjustable mark to indicate a goal), and on the right side is a flow indicator showing whether the patient is inhaling too rapidly.

  5. 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 ...

  6. Peak expiratory flow - Wikipedia

    en.wikipedia.org/wiki/Peak_expiratory_flow

    Measurement of PEFR requires training to correctly use a meter and the normal expected value depends on the patient's sex, age, and height. It is classically reduced in obstructive lung disorders such as asthma. Due to the wide range of 'normal' values and the high degree of variability, peak flow is not the recommended test to identify asthma.

  7. Vital capacity - Wikipedia

    en.wikipedia.org/wiki/Vital_capacity

    Output of a spirometer. Vital capacity (VC) is the maximum amount of air a person can expel from the lungs after a maximum inhalation. It is equal to the sum of inspiratory reserve volume, tidal volume, and expiratory reserve volume. It is approximately equal to Forced Vital Capacity (FVC). [1] [2]