Dräger Narkomed 2B Operator's Instruction Manual page 160

Section 6
Routine Maintenance and Cleaning
Cleaning and
Disinfecting the
Absorber
Assembly
Cleaning and
Disinfecting the
Vaporizer Exterior
6-18
Turn the APL valve control knob fully counterclockwise before cleaning
or disinfecting the absorber system.
After cleaning, an EtO procedure can be used. Follow manufacturer's
guidelines.
CAUTION: Do not autoclave the absorber assembly.
Clean the vaporizer with a soft lint-free cloth moistened with mild
detergent and water. Follow up with a 70% to 90% diluted solution of
ethyl or isopropyl alcohol or sodium hypochlorite (5.2% household bleach)
at 1:500 dilution (100 ppm chlorine). Do not sterilize the vaporizer.
WARNING: Water and other liquids (with the exception of the
appropriate anesthetic) that enter the vaporizer chamber
can cause injury to the patient or form corrosive products
that affect the function of the vaporizer.
CAUTION: Do not immerse the vaporizer or allow water or any other
liquid to enter the fill or drain ports or fresh gas inlet or
outlet ports. Any vaporizer suspected of contamination
with water or any other liquid must be returned to North
American Dräger's Technical Service Department for a
complete overhaul.
Additional care must be taken with halothane vaporizers. Halothane
contains a stabilization additive called thymol, which evaporates more
slowly than halothane, and collects in the vaporizer. Over time, thymol
may decompose into compounds that affect the wick material and turn
the halothane yellow.
If you see particles in the sight glass of a halothane vaporizer, or if the
halothane turns yellow, rinse the vaporizer chamber with fresh
halothane as follows:
1. Drain the discolored halothane from the vaporizer.
2. Fill the vaporizer with fresh halothane up to the maximum level,
then drain completely.
3. Dispose of the drained halothane in accordance with standard
practices at your facility.
For information about filling and draining the vaporizer, see Section 5,
"Operation - Vaporizer."