Dräger Narkomed 2B Operator's Instruction Manual page 47

APL Valve
Breathing System
Leak Test
WARNING: Absorbent is caustic and is a strong eye, skin, and
NOTE:
22. Close all vaporizers and flow control valves. Check for free gas
passage in the patient breathing system. Wear a surgical mask to
inhale and exhale through the breathing system (each limb
individually, if possible). Verify the unidirectional flow in each
limb and then reconnect the tubing.
*23. Check the APL valve to be sure it can relieve excess gas from the
breathing system into the scavenger system.
To check the APL valve's flow resistance:
A. Set the manual/automatic selector valve to BAG.
B. Remove the bag from the swivel arm bag mount.
C. Interconnect the 22 mm ports of the inspiratory and
expiratory valves with a 22 mm hose.
D. Completely open the APL valve by turning the control
knob fully counterclockwise to its stop position.
E. Turn the SYSTEM POWER switch to ON.
F. Open the oxygen flow control valve to a flow of 8 l/min.
G. Occlude the bag mount opening and watch for a pressure
increase on the breathing system pressure gauge. This
pressure increase must not exceed 3 cmH
24. Perform a breathing and fresh gas delivery system pressure test.
This test detects leaks from the patient breathing system and
fresh gas delivery system.
To perform the test:
A. Close all flow control valves on the anesthesia machine.
respiratory tract irritant. When emptying the
absorber dust cup, take care not to spill its caustic
contents.
When changing the CO
chip or crack the absorbent canister. Check the
canister for signs of damage, especially along the
rim, before reinstallation.
Section 3
Daily Checkout
absorbent, take care not to
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