Datex-Ohmeda Aespire 7900, User'S Reference Manual

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Aespire 7900
4-12
Volume Apnea Medium No mechanical breaths or
spontaneous breaths >20
mL in last 30 seconds. Check patient. Bag as needed.
Check for disconnects. If the
patient is on a heart lung
machine, select Cardiac Bypass
on the main menu. - - -
Vol Apnea > 2 min High No mechanical breaths or
spontaneous breaths >20
mL in last 120 seconds. See above. - - -
Vt Not Achieved Low Tidal volume measured by
inspiratory flow sensor
< set value 6 breaths in a
row after the first minute of
mechanical ventilation. Adjust controls to supply
adequate tidal volumes. Check
I:E; Plimit; and volume settings. Possible leak.
Vte > Insp Vt Medium Expired volume > inspired
volume for 6 breaths with a
circle breathing system. Check patient condition. - - -
a. When power is first turned on.
b. Flow sensors are also used to measure pressures.
c. The sustained pressure threshold is calculated from the pressure limit setting. When mechanical ventilation is
on, the sustained limit is calculated as follows: for pressure limits < 30 cmH
2
O, the sustained pressure limit is 6
cmH
2
O; for Plimit between 30 and 60 cmH
2
O, the sustained limit is 20% of the pressure limit (Plimit); for
pressure limits > 60 cmH
2
O, the sustained pressure limit is 12 cmH
2
O. If both PEEP and mechanical ventilation
are on, the sustained pressure limit increases by PEEP - 2 cmH
2
O (the compensated weight of the bellows).
When mechanical ventilation is off, the sustained pressure limit is calculated as follows: for pressure limits ≤ 60
cmH
2
O, the sustained pressure limit is 50% of the pressure limit (Plimit); for pressure limits > 60 cmH
2
O, the
sustained pressure limit is 30 cmH
2
O.
Message Priority Cause Action/Concerns Repair