Certified Hemodialysis Technologist/Technician Exam Dialysis Water Treatment and Quality 2

Question 1

Which bacteria is most commonly associated with dialysis water contamination causing pyrogenic reactions?

Accepted Answer

Pseudomonas aeruginosa

Answer

Staphylococcus aureus

Answer

Escherichia coli

Answer

Streptococcus pyogenes

Question 2

What is the AAMI maximum action level for bacterial counts in dialysis water?

Accepted Answer

100 CFU/mL

Answer

50 CFU/mL

Answer

200 CFU/mL

Answer

500 CFU/mL

Question 3

Endotoxin levels in dialysis water should not exceed which AAMI standard?

Accepted Answer

0.25 EU/mL

Answer

0.1 EU/mL

Answer

1 EU/mL

Answer

5 EU/mL

Question 4

A dialysis technician notices that the RO reject rate has dropped significantly. This most likely indicates:

Accepted Answer

RO membrane fouling or failure

Answer

The RO membrane is working more efficiently

Answer

Improved source water quality

Answer

Softener malfunction only

Question 5

Which chemical is most commonly used to disinfect the dialysis water distribution loop?

Accepted Answer

Peracetic acid

Answer

Isopropyl alcohol

Answer

Glutaraldehyde

Answer

Bleach only

Question 6

The purpose of a UV light unit in a dialysis water treatment system is to:

Accepted Answer

Reduce bacterial load

Answer

Remove heavy metals

Answer

Soften water

Answer

Remove endotoxins