Care, Maintenance, and Tests
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E.5 Open Loop Mode
The Open Loop mode is an emergency backup mode designed for short-term
ventilation. Open Loop is used as a safety mode in the event of ventilator circuit
failures. While in Open Loop mode, the iVent ventilates without reference to the
flow sensor data.
The Open Loop ventilation is an approximation of the Volume Controlled
ventilation with pressure limit. Ventilation is based on the average measured
inhaled volume similar to apnea ventilation. See table E-1. Pressure is measured
via an internal pressure sensor.
Upon the restoration of normal conditions, the unit automatically restores the
previous ventilation parameters after 2-3 proper breaths are detected. The user is
prompted to restore the previous ventilation parameters manually at any time or
to select the Standby Options.
E.6 Adaptive Bi-Level Mode
See Section 5 of this manual.
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