Arena Service Manual
It is important to follow this vinegar rinse procedure if bicarbonate
precipitate is present in the flow path. If allowed to accumulate
excessively, bicarbonate precipitate can cause problems with the
operation of the Instrument. It is recommended that this procedure
be done at least once a week if the clinic is not using Dialox,
Doxan, or Actril.
This procedure will not prevent bicarbonate precipitate formation.
It is useful only in controlling accumulation of the deposit.
Perform this procedure as often as conditions indicate. If
precipitation is significant, this procedure may have to be repeated
multiple times.
9.6.1.2 Supplies Needed
• White vinegar (5% acetic acid solution)
• pH color indicator strips, range pH 6 to 8
9.6.1.3 Precondition
• Patient disconnected.
• Instrument is in Rinse Mode, rinsing with water.
• Dialysate flow rate is 800 mL/min.
9.6.1.4 Procedure
1. Check the pH of the rinse water using a pH indicator strip.
This will establish a baseline pH value to which the system
should be rinsed after exposure to the vinegar.
2. Connect the disinfect line to the container of vinegar.
3. Connect the acid/acetate concentrate line to the disinfect port.
4. Infuse approximately 800 mL of vinegar into the fluid path.
This will take approximately 30 minutes.
5. Before the vinegar supply is completely exhausted, turn off the
Instrument.
6. Allow the vinegar to remain in the fluid path for approximately
30 minutes. For high precipitate build-up allow 60 minutes.
7. Meanwhile, remove the acid/acetate concentrate line from the
disinfect port and put it back on the “A” rinse port.
8. Remove the disinfect line from the vinegar supply and connect
the line to the disinfect rinse fitting.
9. After the dwell time, turn on the Instrument and start rinse.
10. Set the dialysate flow rate to 800 mL/min.
11. Rinse the fluid path for at least 15 minutes.
9-28 157-1278-916, Rev A
March 2004
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