Percussionaire IPV-2C - Page 8

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3. With a longer expiratory time than inspiratory time (i/e ratio of about 1:2.5)
and a selected cycling rate of between 100 and 300 cycles per minute, the
peripheral airways and alveolar pressures are not allowed to reach ambient
before the next sub tidal volume delivery (re-pressurization) is initiated.
4 The peripheral airway and alveolar patency are typically maintained before a
peripheral end expiratory airway air trapping can occur. This is important in
patients with bronchiolar ow restrictions secondary to mucosal and sub
mucosal edema and retained airway secretions, which are often associated
with peripheral pulmonary infections..
5. This cyclic percussive endobronchial sub tidal ventilation, timed in milliseconds,
recruits and maintains the peripheral airways, allowing an alveolar gas exchange
without maintaining an alveolar hyperination.
6. The continuous pulsatile percussive sub tidal inow serves to progressively
recruit the bronchiolar airways, allowing an alveolar gas exchange without
maintaining alveolar hyperination.
7. After peripheral lung recruitment, a minimal cyclic expiratory oscillatory CPAP
is maintained within the recruited bronchioles and alveoli to maintain the
patency of the recruited structures during the expiratory interval.
8. This intrapulmonary end expiratory pressure hold helps to maintain the
functional residual capacity (FRC) between pulses. During TRUE-IPV® lung
recruitment programming, the tracheal bronchial tree is vented to ambient
during the cyclic expiratory phase of each delivered sub tidal volume during
Oscillatory CPAP scheduling.
9. During CPAP programming, reciprocating inspiratory ow gradients are created
to deliver and recover endobronchial sub tidal volumes from the bronchioles
and the pulmonary alveoli.
10. The percussive endobronchial sub tidal inows produce a directional
compressive “stripping action” within the vessels of the intrathoracic circulations
attached to the walls of the expanding endobronchial airways. This is called an
enhanced pulmonary vesicular peristalsis.
NOTE: Intrapulmonary Percussive Ventilation (IPV®) serves as a lung recruitment means
by percussive intrapulmonary gas mixing and exchange as well as enhancing the
physiological vesicular peristalsis within the three intrathoracic circulations.