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 Water Treatment and Quality flashcards as text
What is the AAMI maximum allowable bacterial count in dialysate?
Answer: 200 CFU/mL
AAMI standards allow a maximum of 200 CFU/mL of bacteria in dialysate.
Activated carbon tanks in a water treatment system primarily remove which contaminants?
Answer: Chlorine and chloramines
Activated carbon adsorbs chlorine and chloramine from the feed water, protecting downstream components.
A patient develops sudden hemolysis during dialysis. Which water contaminant should be suspected first?
Answer: Chloramine
Chloramine exposure during dialysis directly damages red blood cell membranes, causing acute hemolysis.
How frequently should the deionizer resin tanks be tested for resistivity in a dialysis water system?
Answer: Each treatment shift
Deionizer resin exhaustion must be monitored with resistivity testing at each treatment shift to ensure ion removal effectiveness.
What minimum water-to-concentrate ratio is used by most proportioning hemodialysis machines?
Answer: 34:1
Most proportioning systems dilute bicarbonate or acetate concentrate at a 34:1 (water to concentrate) ratio to create dialysate.
Which method is used to disinfect dialysis water distribution loops?
Answer: Peracetic acid or bleach recirculation
Chemical disinfection with peracetic acid or sodium hypochlorite (bleach) is the most common method for disinfecting dialysis water loops.