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Volume Control Cycle (Inspiration to Expiration) (Only available during Volume Control Therapy)
An Inspiratory Time setpoint limits the time spent in inspiration during breathing in all modes. Once the time limit is reached, the unit automatically cycles to expiration.
Flow Trigger
Flow trigger provides a manual setting that allows for breath initiation and termination based on a set flow trigger sensitivity and flow cycle sensitivity.
Flow Trigger Sensitivity (Expiration to Inspiration):
The flow trigger initiates when the patient’s inspiratory effort creates a flow equal to or greater than the flow trigger sensitivity setting. The method of the flow trigger is dependent upon the circuit type that is chosen.
Leak Compensation:
When using the Passive Circuit configuration, compensation for both the intentional and unintentional leak is included in the triggering method.
When using the Active PAP Circuit configuration, leak compensation is not available.
When using the Active Flow Circuit configuration, flow trigger with leak compensation may be enabled. The default setting when using the Active Flow Circuit is Leak Compensation On. The clinician has the option to turn off leak compensation; however, unintentional leak will not be compensated. Both options measure the flow at the proximal flow sensor.
Flow Cycle Sensitivity (Inspiration to Expiration):
This cycling method is only active if the Flow Trigger has been selected for the Trigger Type. As flow begins to decrease during inspiration, if the patient flow is less than the flow cycle sensitivity setting, the device will cycle to expiration.
For example: if the flow cycle sensitivity setting is set to 75%, when the flow has decreased by 25% of the peak flow, the device will cycle to the EPAP/PEEP level.
Note: Enabling Leak Compensation when using the Active Flow Circuit configuration only affects triggering and does not affect tidal volume delivery or Vte measurement.
