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Target device for regulating ventilation during voluntary hyperpnea.

D E Leith

    Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology
    |December 1, 1983
    PubMed
    Summary
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    This study introduces a simple, affordable ventilatory target device that helps individuals control their breathing during voluntary hyperpnea. The device accurately guides users to maintain target ventilation levels within 5% accuracy.

    Area of Science:

    • Respiratory physiology
    • Medical device engineering

    Background:

    • Voluntary hyperpnea requires precise control of ventilation.
    • Existing methods for guiding ventilation can be complex or expensive.

    Purpose of the Study:

    • To describe a novel, low-cost device for targeting ventilation during voluntary hyperpnea.
    • To evaluate the device's accuracy and usability for inexperienced subjects.

    Main Methods:

    • A ventilatory target device using a linear resistor and a slow-response manometer was designed.
    • The device measures pressure drop, proportional to inspiratory flow and minute ventilation.
    • Construction, calibration, and usability with inexperienced subjects were assessed.

    Main Results:

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  • The device accurately displays time-mean inspiratory pressure, reflecting minute ventilation.
  • Inspiratory resistances ranged from 0.6 to 1.9 cmH2O·L−1·s.
  • Inexperienced subjects achieved target ventilation within approximately 5% accuracy.

    • Conclusions:

    • The described device is simple, portable, unpowered, and accurate for targeting ventilation.
    • It facilitates rapid learning and effective use by inexperienced individuals.
    • This tool can aid in respiratory training and research requiring controlled hyperpnea.