Certified Hemodialysis Technologist/Technician Exam Water Treatment and Quality 2

Question 1

What is the AAMI maximum allowable bacterial count in dialysate?

Accepted Answer

200 CFU/mL

Answer

AAMI standards allow a maximum of 200 CFU/mL of bacteria in dialysate.

Question 2

Activated carbon tanks in a water treatment system primarily remove which contaminants?

Accepted Answer

Chlorine and chloramines

Answer

Activated carbon adsorbs chlorine and chloramine from the feed water, protecting downstream components.

Question 3

A patient develops sudden hemolysis during dialysis. Which water contaminant should be suspected first?

Accepted Answer

Chloramine

Answer

Chloramine exposure during dialysis directly damages red blood cell membranes, causing acute hemolysis.

Question 4

How frequently should the deionizer resin tanks be tested for resistivity in a dialysis water system?

Accepted Answer

Each treatment shift

Answer

Deionizer resin exhaustion must be monitored with resistivity testing at each treatment shift to ensure ion removal effectiveness.

Question 5

What minimum water-to-concentrate ratio is used by most proportioning hemodialysis machines?

Accepted Answer

34:1

Answer

Most proportioning systems dilute bicarbonate or acetate concentrate at a 34:1 (water to concentrate) ratio to create dialysate.

Certified Hemodialysis Technologist/Technician Exam Practice Test