Arena Service Manual
9.2 DISINFECTION OVERVIEW
The Arena Instrument provides alternative ways to disinfect the
fluid path. Baxter recommends that the fluid path be disinfected at
least once every treatment day and that regular cultures be taken of
the dialysate to ensure that the bacterial level in the dialysate is
acceptable. Weekly disinfection with a chemical disinfectant is
recommended as a supplement to daily heat cleaning.
Available disinfection methods depend on the options included in
the Instrument. They are:
• Heat
o Heat Clean with Cool Down
o Heat Clean with Auto Off
o Citric Acid Heat with Cool Down
o Citric Acid Heat Clean with Auto Off
o Integrated Heat Clean
• Single pass chemicals: Sodium hypochlorite (1.75% and
5.25%) and Amuchina
• Dwell chemicals: Actril, Doxan, Dialox and Formaldehyde
(1.06%, 2.0%, and 4.0%)
Disinfection and cleaning methods should be chosen that meet the
needs of the users and provide adequate cleaning and disinfection
of the Instrument.
All of the heat disinfection methods operate only in an automated
mode. Each of the chemical disinfection methods may be
automated or infused manually. The software offers a Disinfection
Infusion Monitor feature that allows the infusion of disinfectant to
be monitored.
The flow paths for single pass and dwell chemicals are shown in
the diagrams at the end of this section.
Refer to the Operator’s Manual for the specific disinfection
procedures for this Instrument.
Caution
Proper incoming water line disinfection must be followed in
order to prevent heater damage.
When a disinfection cycle is initiated, the Instrument will perform
the following actions:
Inhibit operation of the heparin pump
9-4 157-1278-916, Rev A
March 2004
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