Operator's Manual
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3-8
determines the total number of mandatory breaths. The frequency or rate
value is displayed in the window adjacent to the selector button.
The user is alerted to frequency settings which result in an inverse I:E Ratio
by an audible beep and an “
Inverse I:E
” message in the Message Display
Window. Attempts to continue increasing the value after this alert are
permitted up to an I:E Ratio of 3:1.
3.2.7 t
I
(Inspiratory Time)
Figure 8 – t
I
(Inspiratory Time) Button
Range: 0.1 to 3.0 sec
The t
I
setting determines the inspiratory time for mandatory breaths
(volume or pressure control). The selected time value is displayed in the
window adjacent to the selector button. If the t
I
settings results in an
inverse I:E Ratio, the user is alerted by an audible beep and an
Inverse I:E
message in the Message Display Window. Attempts to continue increasing
the value after this alert are permitted up to an I:E Ratio of 3:1.
If the inspiratory time setting causes the flow rate to reach the maximum or
minimum level of the flow specification, adjustment of t
I
ceases, a beep
sounds, and a setting limitation message appears in the Message Display
Window.
In SPONT mode, the t
I
setting is not utilized but the value
can be preset.
See page 3-28 for a list of setting limitation messages.
3.2.8 Volume Control (tidal volume)
Figure 9 – Volume Control Button
Range:
100 to 2,200 mL, ATPS
When Volume Control is first initiated, or when a large
change is made to the volume setting, it may take 5 or
6 breaths to reach the volume setting.