Arena Service Manual
• The patient is disconnected from the dialyzer and blood
lines.
• The dialyzer connectors are connected to the rinse block.
• The machine is in Rinse Mode and has been rinsed with
water for at least 10 minutes.
• The conductivity is less than 1 mS/cm.
• The dialysate flow rate is 500 mL/min.
Procedure
1. Touch RINSE MENU.
2. Touch HEAT CLEAN MENU, HEAT CLEAN, then VERIFY.
3. Connect the acid/acetate concentrate line (pink connector) to a
container of citric acid solution. The acid concentrate line is
used to infuse a fixed volume of citric acid (refer to Table 9-1
to determine the quantity of citric to be infused).
4. Infuse the desired citric acid solution into the fluid path.
5. Disconnect the acid/acetate concentrate line from the disinfect
container and connect it to the acid/acetate rinse port (pink).
6. Allow Heat Clean and Cool Down to complete.
7. After the Instrument returns to the Rinse Mode, allow to rinse
for 15 minutes.
8. Obtain a sample of the rinse solution from the dialysate line
sample port and check for residual citric acid.
a. Check for residual citric acid content with a test specific for
citric acid.
b. If the residual citric acid content is within acceptable limits,
the Instrument can be prepared for dialysis. If the
Instrument is not within acceptable limits continue to rinse
until the level is acceptable.
WARNINGS
Make sure that the determination test shows a
sufficiently low level of citric acid in the rinse solution
before dialysis. Refer to the attending physician’s
directives for the acceptable limit and the AAMI
standard for hemodialysis.
To ensure that the citric acid level in the dialyzer circuit
is below a level acceptable for patient safety, sample the
rinse solution in the dialysate lines.
9-12 157-1278-916, Rev A
March 2004
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