Breath Types and Therapy Modes
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Volume Targeted Ventilation Overview
The Volume Targeted ventilation modes deliver a set Tidal Volume to the patient by adjusting the pressure control
target on a breath-to-breath basis. These modes may be useful in maintaining consistent volume delivery in the face of
changing patient conditions such as compliance.
In Volume Targeted modes, V*Home delivers a an initial breath to the patient, and then automatically adjusts the therapy
to achieve and maintain the target Tidal Volume. The rst breath is delivered as a pressure control breath at the set Pres.
Minimum. V*Home then measures and calculates the pressure required to deliver the set Tidal Volume to the patient for
subsequent breaths.
With each breath, V*Home makes adjustments to the delivered pressure to achieve the target Tidal Volume. The
adjustment rate can be set using the Pres. Adj. Rate control. Setting the Pres. Adj. Rate control to Slow will increment
breaths by up to ±1 cmH2O per breath. The Fast setting will increment breaths by up to ±3 cmH2O per breath.
NOTE: V*Home will pause calculations during activation of the High Pressure, Check Patient Circuit, or Patient Circuit
Disconnect alarm, and then resume them once the alarm is resolved.
During Volume Targeted ventilation, the delivered pressure is limited to 5 cmH2O below the High Pressure alarm setting,
or 50 cmH2O (whichever is less).
NOTE: In some cases, the High Pressure limit may prevent V*Home from delivering the entirety of the set Tidal Volume
to the patient. Ventec Life Systems recommends using the Low Minute Volume alarm as a way to detect this condition.
NOTE: The Pres. Minimum setting may cause V*Home to deliver more volume than intended by the Tidal Volume
setting. Ventec Life Systems recommends using the High Minute Volume alarm to detect this condition.
Min. Insp.
Pressure
First breath
delivered at set
Min. Insp. Pressure
To deliver the target volume,
pressure changes each breath at
Pressure Adjustment rate setting:
Slow (1 cmH2O) or Fast (3 cmH2O)
Pressure stabilizes
at the target volume
To maintain the target volume as patient
compliance shifts, pressure changes at
Pressure Adjustment rate (but will not fall
below Min. Insp. Pressure setting)
Upper pressure limit:
5 cmH2O below High Pressure alarm setting,
or 50 cmH2O (whichever is less)
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