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
When testing dialysis water conductivity, a sudden drop in conductivity of the RO product water suggests:
Answer: Possible membrane breakthrough
A sudden drop in conductivity of RO product water can paradoxically indicate membrane breakthrough as low-conductivity contaminants pass through.
Which AAMI document provides the most current standards for water quality in hemodialysis?
Answer: AAMI RD62
AAMI RD62 is the primary standard governing water quality for hemodialysis, covering maximum allowable chemical and microbial contaminant levels.
What does a hardness breakthrough in the water softener indicate?
Answer: The softener resin is exhausted and needs regeneration
Hardness breakthrough means the ion exchange resin is exhausted and calcium/magnesium ions are passing through, requiring immediate regeneration.
Dialysis concentrate mixing ratios typically use which proportion of concentrate to water?
Answer: 1:34 for bicarbonate, 1:44 for acid
Standard hemodialysis uses a 1:34 bicarbonate concentrate ratio and a 1:44 acid concentrate ratio to produce dialysate.
Nitrate contamination in dialysis water is particularly dangerous because it causes:
Answer: Methemoglobinemia
High nitrate levels in dialysis water convert hemoglobin to methemoglobin, which cannot carry oxygen, causing methemoglobinemia.
How frequently should microbiological testing of dialysis water be performed at minimum according to best practice guidelines?
Answer: Monthly
Monthly microbiological testing of dialysis water is the minimum recommended frequency to monitor for bacterial contamination.