9. Disinfection
12. Inspect the dialysate lines.
a. If precipitate is still present, an infusion of another fresh
supply of vinegar is required; repeat Steps 2 through 10.
b. If the lines are clean, go to the next step.
13. Using pH indicator strips, check the pH of the rinse water.
14. Continue rinsing as required until the pH of the rinse water has
returned to the value noted in Step 1, above.
9.6.2 Biological Deposits in the Drain Line
9.6.2.1 Overview
The Heat Clean Mode without Auto Off is an excellent method for
disinfecting the Instrument fluid path as well as to break down
biological deposits.
Weekly disinfection with diluted bleach is also recommended for
the Instrument to disinfect the drain line.
Due to a number of reasons, biological material may build up in
the drain line. Some possible reasons are:
• Lack of adequate rinse before disinfection.
• Drain line pushed too deeply into the drain. There should
be an air gap between the drain line and the water in the
drain.
• Inadequate chemical disinfection.
Biological material in the drain line may cause the following
problems:
• Failure of the TMP in Self Test.
• Unable to start Self Test because TMP is in “negative TMP
alarm” during the Rinse Mode.
• Flow Restricted alarms.
9.6.2.2 Supplies Needed
• 1 liter 5.25% sodium hypochlorite (household bleach)
9.6.2.3 Precondition
• Patient is disconnected.
• Instrument has been rinsed for at least 10 minutes with water.
• Instrument is in Rinse Mode.
157-1278-916, Rev A 9-29
March 2004
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