Ventway Sparrow User Manual
Page 88 of 144
6. If no spontaneous breathing attempt is detected during the inspiratory
trigger window, the machine-triggered mandatory breath is applied.
The mandatory tidal volume (VT) results from the pressure difference
between PEEP and Pinsp, the lung mechanics and the breathing effort of
the patient. Pinsp is the inspiratory pressure (pressure in the lung
throughout the inspiratory cycle). If the lung mechanics change (pressure,
water in the lungs etc.) the ventilation will not change the volume, and the
only change may be the PIP (within the safety/alarm pressure values).
Note: In non-invasive ventilation the ventilator is programmed to
compensate for the loss of volume due to leaks from the facemask.
Actual delivered tidal volume can only be interpolated, and is not
displayed.
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