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  2. 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.

  3. 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).

  4. Incentive spirometer - Wikipedia

    en.wikipedia.org/wiki/Incentive_spirometer

    An incentive spirometer is a handheld medical device used to help patients improve the functioning of their lungs. By training patients to take slow and deep breaths, this simplified spirometer facilitates lung expansion and strengthening. Patients inhale through a mouthpiece, which causes a piston inside the device to rise.

  5. Helium dilution technique - Wikipedia

    en.wikipedia.org/wiki/Helium_dilution_technique

    The spirometer measures helium concentration. The helium spreads into the lungs of the patient, and settles at a new concentration (C2). Because there is no leak of substances in the system, the amount of helium remains constant during the test, and the FRC is calculated by using the following equation: =

  6. Respiratory inductance plethysmography - Wikipedia

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

    When a known air volume is inhaled and measured with a spirometer, a volume-motion relationship can be established as the sum of the abdominal and rib cage displacements. Therefore, according to this theory, only changes in the antero-posterior diameter of the abdomen and the rib cage are needed to estimate changes in lung volume.

  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]

  8. ‘You get one split second’: The story behind a viral bird photo

    www.aol.com/one-split-second-story-behind...

    A video, taken by Crombie’s friend, shows the precise moment thousands of starlings fleetingly appear as one, a curved, winged form reflected in the water below. A flurry of camera shutter ...

  9. 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.