iVent201 Operator's Manual
281
F.2.3.1 Table - Maximum Inspiratory Hold Time for
Different Tidal Volumes:
Tidal Volume Time
Vt < 200 ml 1.0 sec
200 ml < Vt < 500 ml 2.0 sec
Vt > 500 ml 3.0 sec
The duration of the expiratory hold is also dependent on the Tidal Volume
delivered to the patient. It is set according to the table below.
F.2.3.2 Table - Maximum Expiratory Hold Time for
Different Tidal Volumes
Tidal Volume Time
50 ml < Vt < 200 ml 1.0 sec
200 ml < Vt < 500 ml 2.0 sec
Vt > 500 ml 4.0 sec
Note that no compensation needs to be made for the length of the
ventilator tubing as the volume measurements are made at the flow
sensor which is located at the patient “Y” connector. The compliance of
the respiratory tubing does not contribute to the volume measured during
exhalation.
All calculated respiratory static parameters are displayed in the Mechanics
window with the appropriate time when the respective hold maneuver
was performed (see section F.3.2)
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