Certified Hemodialysis Technologist/Technician Exam Dialyzer Reprocessing and Reuse

Question 1

According to AAMI guidelines, a dialyzer should be rejected for reuse if the total cell volume (TCV) falls below what percentage of the original volume?

Accepted Answer

80%

Answer

50%

Answer

70%

Answer

90%

Question 2

Which chemical is most commonly used as a germicide in manual dialyzer reprocessing?

Accepted Answer

Formaldehyde (4%)

Answer

Sodium hypochlorite at 5%

Answer

Isopropyl alcohol 70%

Answer

Hydrogen peroxide 35%

Question 3

Before a reprocessed dialyzer is used on a patient, residual germicide must be tested. Which test confirms formaldehyde removal?

Accepted Answer

Colorimetric test using chromotropic acid or equivalent

Answer

pH test strip

Answer

Conductivity test

Answer

Glucose oxidase strip

Question 4

Peracetic acid/hydrogen peroxide (Renalin/Minncare) used in dialyzer reprocessing is advantageous because:

Accepted Answer

It breaks down into non-toxic products (acetic acid, water, oxygen)

Answer

It requires no rinsing before reuse

Answer

It is safe to inhale in concentrated form

Answer

It requires no germicide residual testing

Question 5

The maximum number of times a dialyzer may be reused is determined by:

Accepted Answer

The dialyzer's TCV, blood leak test, and visual inspection at each reprocessing

Answer

Federal law mandating a fixed maximum of 30 uses

Answer

Patient preference only

Answer

A fixed 10-use maximum in all facilities

Question 6

A blood leak test on a reprocessed dialyzer involves:

Accepted Answer

Applying pressure to the blood compartment and checking for leaks into the dialysate side

Answer

Testing patient blood for dialysate contamination

Answer

Checking for visible blood in the dialysate during treatment

Answer

Measuring urea clearance only