5-12
5.3.5.4 Set MV and TVe Alarm Limits
1. Select the [Alarm Setup] shortcut key and select [Ventilator >>].
2. Set MV high and low alarm limits in the [Ventilator Alarm Limits] menu.
3. Set TVe high and low alarm limits as required.
4 Select
to exit the current menu.
5.3.5.5 Review TVe and MV Trends
For details about reviewing TVe and MV trends, refer to 12 Trend and Logbook.
5.3.6 Tidal Volume Compensation
Tidal volume compensation compensates for lack of tidal volume due to the effects of
Fresh gas flow, or
Loss of gas compression, or
Breathing system compliance, or
Small amount of leakage, or
Combination of the factors above
, to achieve the consistency between actually delivered tidal volume and the set tidal volume.
By default, the system automatically performs tidal volume compensation.
If the measured tidal volume is quite different from the tidal volume indicated by the bellows,
you can turn off tidal volume compensation. By changing the set tidal volume or switching
over to pressure ventilation mode, you can achieve the consistency between the tidal volume
indicated by the bellows and the tidal volume required. To turn off tidal volume
compensation, do as follows:
1. Select the [User Setup] shortcut key.
2. Select [TV Comp] and select [OFF].
3. Select
to exit the current menu.
If the current ventilation mode is VCV or SIMV-VC, the system prompts [TV Comp Off]
when tidal volume compensation is turned off.
In the volume ventilation mode, tidal volume compensation is turned off automatically if the
fresh gas pressure is too high, or the flow sensor has a great measurement deviation, or there
is significant leakage in the breathing system. In this case, the system prompts [TV Comp
Off] and the menu item of [TV Comp] turns grey indicating that this option is disabled. You
need to troubleshoot the problem. After the fault is troubleshot, the system prompts [TV
Comp Available]. You can set [TV Comp] to [ON] to restore the TV compensation function.
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