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

Pseudomonas aeruginosa thrives in water environments and is a leading cause of gram-negative bacteremia and pyrogenic reactions in dialysis patients.

Question 2

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

Accepted Answer

100 CFU/mL

Answer

AAMI standards set the action level for bacterial contamination in dialysis water at 100 CFU/mL, requiring corrective action when exceeded.

Question 3

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

Accepted Answer

0.25 EU/mL

Answer

AAMI specifies that endotoxin levels in standard dialysis water must not exceed 0.25 EU/mL to prevent inflammatory reactions.

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

A drop in RO reject rate (less water being rejected) often signals membrane fouling or failure, reducing its ability to reject contaminants.

Question 5

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

Accepted Answer

Peracetic acid

Answer

Peracetic acid is widely used to disinfect dialysis water distribution loops due to its effectiveness against biofilm and gram-negative organisms.

Certified Hemodialysis Technologist/Technician Exam Practice Test