11. When the cells stop firing, the inspiratory muscles relax, inspiration ceases, and exhalation begins. 12. It is low-pitched, non-musical, and occurs during the inspiratory phase only. 13. Unlike the inflation reflex, the afferents terminate on inspiratory centers rather than the pontine apneustic center. 14. Each inspiratory effort that is beyond the sensitivity threshold delivers full pressures support for a fixed inspiratory time. 15. Each inspiratory effort that is beyond the sensitivity threshold delivers full pressures support for a fixed inspiratory time. 16. Further, the larger the patient's inspiratory flow rate, the greater the dilution from air. 17. The theory is to ensure that the lowest inspiratory pressure necessary to achieve the desired tidal volume is used. 18. In Pressure Support, the set inspiratory pressure support level is kept constant and there is a decelerating flow. 19. This is because venturi masks are able to provide total inspiratory flow at a specified FiO 2 to patients therapy. 20. In response, the inspiratory area is inhibited directly and the apneustic center is inhibited from activating the inspiratory area.
