Setting The O 2 Concentration; Setting The Fresh-Gas Flow; Sorc (Sensitive Oxygen Ratio Controller) - Dräger Primus SW 4.5n Instructions For Use Manual

Operation
1 Press the hard key N
The green LED in the key flashes.
2 Push the rotary knob to confirm (B). The green
LED lights continuously.
The selected fresh gas components are displayed
on the screen.
Setting the O concentration
2
A B
1 Press the soft key O
The key field appears yellow.
2 Set and confirm the O
rotary knob.

Setting the fresh-gas flow

1 Press the soft key flow L/min (B).
The key field appears yellow.
2 Set and confirm the fresh-gas flow using the ro-
tary knob.
92
O or Air (A).
2
(A).
2
concentration using the
2
CAUTION
Risk of patient injury
The use of minimum flow or low flow settings may
lead to the accumulation of metabolic products
(hypoxic gas mixtures) in the breathing system.
After performing minimum or low flow anesthesia,
the breathing system should be cleaned and ster-
ilized as described in "Cleaning, Disinfection and
Sterilization" on page 207.
SORC (Sensitive Oxygen Ratio
Controller)
100
90
80
Setting ranges
70
60
50
x
40
30
20
10
0
0.5
0.2
Fresh-gas flow [L/min]
Primus is fitted with an electronic O
livery system to avoid hypoxic gas mixtures when
N O is selected as carrier gas. For fresh-gas flows
2
greater than 0.8 L/min, the minimum O
tion is limited to 25 %.
For fresh-gas flow settings below 0.8 L/min, the O
concentration is automatically increased to a value
corresponding to an O
control system is activated, the O
highlighted with a yellow background in addition to
the active settable value. The minimum oxygen de-
livery consequently equals 200 mL/min when using
N O as carrier gas.
2
The SORC function is not active when Air is se-
lected as carrier gas and 100 % Air can be metered
throughout the entire flow range.
Instructions for use Primus SW 4.5n
0.8
(maximum)
minimum de-
2
concentra-
2
flow of 200 mL/min. If this
2
% value is also
2
18.00
-
2