Ventway Sparrow User Manual
Page 29 of 144
Inspiratory (1) vs. Expiratory (2) cycle
During the inspiratory cycle, the exhalation valve membrane is closed, allowing the gas from the ventilator to be
diverted to the patient. Once the inspiration cycle is complete, the membrane opens, allowing the gas from the
patient to be exhaled through the exhalation valve.
The expiratory gas passes through the membrane which is constantly supported by a spring, creating the preset PEEP
value. During expiratory flow, a continuous low flow is delivered into the patient circuit, in order to prevent any re-
breathing and to compensate for small leaks that may exist in the various circuit components or facemasks.
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