Methods and apparatus for varying the back-up rate for a ventilator

摘要

A ventilator device delivers ventilatory support to a patient in a back up timed mode when patient respiration is not detected or a spontaneous mode when patient respiration is detected. The timing threshold governing the back-up mode is chosen to deviate from normal expected respiration time for the patient to promote patient initiated ventilation in the spontaneous mode but permit back-up ventilation in the event of apnea. Automated adjustments to the timing threshold during the timed mode are made from the less vigilant timing threshold to a more vigilant threshold at or near a timing of normal expected breathing of the patient. Such adjustments may be made from a minimum to a maximum vigilance timing settings or incrementally there between as a function of time in the timed mode which is preferably the number of delivered machine breaths.

主权项

1. An apparatus for setting back up support ventilation comprising:
a ventilation generation device, a sensor for detecting spontaneous patient breathing, and a controller, including at least one processor, the controller coupled with the sensor and the ventilation generation device, the controller configured to control: an initiation of a first machine breath as a function of an initial timing threshold in the absence of a detection by the controller of a spontaneous breath; a modification of the initial timing threshold in a continued absence of the detection of a spontaneous breath; and an initiation of a second machine breath as a function of the modified timing threshold during the continued absence of the detection of a spontaneous breath.