Dialysis Water Treatment and Quality Flashcards
6 cards from real CHT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Dialysis Water Treatment and Quality flashcards as text
Which bacteria is most commonly associated with dialysis water contamination causing pyrogenic reactions?
Answer: Pseudomonas aeruginosa
Pseudomonas aeruginosa thrives in water environments and is a leading cause of gram-negative bacteremia and pyrogenic reactions in dialysis patients.
What is the AAMI maximum action level for bacterial counts in dialysis water?
Answer: 100 CFU/mL
AAMI standards set the action level for bacterial contamination in dialysis water at 100 CFU/mL, requiring corrective action when exceeded.
Endotoxin levels in dialysis water should not exceed which AAMI standard?
Answer: 0.25 EU/mL
AAMI specifies that endotoxin levels in standard dialysis water must not exceed 0.25 EU/mL to prevent inflammatory reactions.
A dialysis technician notices that the RO reject rate has dropped significantly. This most likely indicates:
Answer: RO membrane fouling or failure
A drop in RO reject rate (less water being rejected) often signals membrane fouling or failure, reducing its ability to reject contaminants.
Which chemical is most commonly used to disinfect the dialysis water distribution loop?
Answer: Peracetic acid
Peracetic acid is widely used to disinfect dialysis water distribution loops due to its effectiveness against biofilm and gram-negative organisms.
The purpose of a UV light unit in a dialysis water treatment system is to:
Answer: Reduce bacterial load
UV irradiation disrupts bacterial DNA, reducing the bioburden in the water distribution system before it reaches patients.