Certified Hemodialysis Technologist/Technician Exam Dialyzer Reprocessing and Reuse 3

Question 1

Which type of dialyzer membrane is most commonly used in modern hemodialysis and associated with improved biocompatibility?

Accepted Answer

High-flux synthetic (polysulfone, polyethersulfone)

Answer

Cuprophane (cellulose)

Answer

Unmodified cellulose

Answer

Low-flux cellulose acetate

Question 2

The ultrafiltration coefficient (KUF) of a dialyzer describes:

Accepted Answer

The amount of fluid removed per mmHg transmembrane pressure per hour

Answer

The rate of urea clearance

Answer

The surface area of the membrane

Answer

The sterilization method used

Question 3

First-use syndrome (type A anaphylactic reaction) during hemodialysis is most classically associated with which dialyzer membrane type?

Accepted Answer

Ethylene oxide-sterilized AN69 membranes in patients on ACE inhibitors

Answer

High-flux polysulfone

Answer

Cellulose triacetate membranes

Answer

All synthetic membranes equally

Question 4

Reuse of dialyzers in the United States is regulated by which federal agency?

Accepted Answer

CMS (Centers for Medicare & Medicaid Services) via Conditions for Coverage

Answer

FDA only

Answer

EPA only

Answer

OSHA only

Question 5

The primary reason high-flux dialyzers require ultrapure dialysate is:

Accepted Answer

Their large pore size allows back-filtration of dialysate into the blood compartment

Answer

They use more electricity

Answer

They cost more to manufacture

Answer

High-flux dialyzers do not require ultrapure dialysate

Question 6

Which occupational exposure risk is greatest for staff performing manual dialyzer reprocessing without proper PPE?

Accepted Answer

Chemical exposure to germicides (formaldehyde, peracetic acid)

Answer

Radiation exposure

Answer

Electrical hazard from automated equipment

Answer

Ergonomic injury only