Oxygen Ratio Controller - Low Pressure System; Apl Valve - Dräger Medical Narkomed 6400 Operator's Manual

Oxygen Ratio
24.
Controller -
nitrous oxide flow control valve open to a flow of 10 L/min, vary the
Low Pressure
oxygen flow with the oxygen flow control valve. The nitrous oxide flow,
System
as indicated on the nitrous oxide flowmeter, must automatically vary in
response to the adjustment of the oxygen flow control valve.
The ORC must maintain a fresh gas oxygen/nitrous oxide flow ratio of at
least 21% oxygen.

APL Valve

25.
breathing system into the scavenger system. To check the APL valve's
flow resistance:
a. Set the APL valve toggle to the SPONT position. Verify that the
b. Set the ventilation mode to Manual/Spontaneous Mode.
c. Occlude the patient Y-piece.
d. Open the oxygen flow control valve to a flow of 8 L/min.
e. Switch the APL toggle to the MAN position and observe the pressure
f.
g. Observe the pressure waveform on the monitor drops. The pressure
Oxygen - Low
26.
Pressure
a. Make sure all vaporizers are closed.
System
b. Test the oxygen flush. Pressing the oxygen flush button must result
c. Verify the delivered oxygen concentration. Open the patient Y-piece.
d. Open the oxygen flow control valve to an 8 L/min flow and close all
Part Number: 4117965-001
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! Check the function of the oxygen ratio controller (ORC). With the
! Check the APL valve, making sure it can relieve excess gas from the
APL control is set to 30 cmH
on the monitor rise to a steady state level of approximately
30 cmH O.
2
Note:
This level can be determined by displaying the Software
Pressure Gauge on the Narkomed 6400 monitor screen.
Switch the APL toggle to the SPONT position.
now must not exceed 5 cmH
threshold limit.
!
Oxygen Verification
in an audible gas flow sound, accompanied by a marked increase in
oxygen concentration in the breathing system.
Repeatedly flush the patient breathing system by pressing the
oxygen flush button. Open the oxygen flow control valve to a flow of
8 L/min and close the other flow control valves. The oxygen
measurement display area should indicate 97 to 100% oxygen
concentration.
other flow control valves. Sniff the gas coming from the patient
Y-piece in the breathing system. There should be no noticeable odor.
Narkomed 6400 Operator's Manual
Rev: A
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Checkout Procedures
O.
2
O, the minimum apnea pressure
2
7
7-9