LTV 1200 Operator's Manual - CareFusion Emergency Preparedness

SBT > f/Vt
When the Spontaneous Breathing Trial (SBT) mode of ventilation is on and the monitored f/Vt (Total
Breath Rate divided by the Average Exhaled Tidal Volume) is greater than the HIGH f/Vt setting (high
limit of the f/Vt range) for 30 seconds, the SBT > f/Vt alarm* is generated.
For additional information concerning the Spontaneous Breathing Trial (SBT) mode of ventilation, see
SBT (Spontaneous Breathing Trial) Operations in Chapter 10 - Extended Features.
When a SBT > f/Vt alarm is generated:
• The SBT > f/Vt message is flashed in the display window.
• The audible alarm is sounded.
To reset the SBT > f/Vt alarm:
1) Push the Silence Reset button once to silence the audible alarm.
2) Push the Silence Reset button twice to reset the alarm (silences the audible alarm and clears
the flashing display).
• When the SBT > f/Vt alarm is reset (Silence Reset button pushed twice), the alarm is
suspended for the next 60 seconds.
• The 60-second suspension of the SBT > f/Vt alarm is only enabled when the alarm is
manually silenced/reset by pushing the Silence Reset button twice. It is not enabled
when the SBT > f/Vt alarm is automatically silenced/reset because the patient’s breath
rate is no longer greater than the set HIGH f/Vt alarm value.
• When an SBT alarm has been active in excess of 5 minutes, the SBT mode of ventilation
is terminated, the ventilator clears the alarm status, silences the audible alarm and
returns to its previous mode of ventilation / settings. To remove the flashing SBT alarm
message from the display window, push the Silence Reset button.
Page 9-30 LTV ® 1200 Ventilator Operator’s Manual
p/n 18247-001, Rev. G