Dräger Fabius, Instructions For Use Manual, Page: 90 / 232

Operation
90
Instructions for Use Fabius MRI SW 3.n
Low Flow Anesthesia
With low flow anesthesia (means flow
≤
1.0 L/min)
the condensation of patients humidity from the
expired breath is natural. Condensation occurs in
the hoses. To avoid water accumulating in the
hoses, a water trap should be integrated in the ven-
tilator hose. In long term low flow anesthesia the
additional use of watertraps in the expiratory hose
is recommended. Empty water traps if their water
level exceeds the maximum water level limit.
Nitrogen Wash-Out (If Required)
During anesthesia induction, air containing about
77 % nitrogen (N
2
) remains in the compact breath-
ing system (and in the patient's lungs). If the unit will
be used for a low-flow anesthesia case, press the
O
2
Flush to remove this N
2
.
Replacing CO
2
Absorbent
The CO
2
absorbent in the compact breathing sys-
tem should be replaced when two-thirds of the CO
2
absorbent has changed color. Dräger recommends
the use of Drägersorb 800 Plus or Drägersorb
FREE. The color change indicates that the CO
2
absorbent can no longer absorb CO
2
(Drägersorb 800 Plus and Drägersorb FREE
change from white to violet).