Free Certified Hemodialysis Technologist/Technician Questions and Answers

Question 1

Which of the following characteristics describes a hollow fiber dialyzer?

Accepted Answer

Very fine fiber tubes held in place by polyurethane material

Answer

Fibers about 1 cm in width

Answer

A high-membrane compliance

Answer

A high resistance in the fibers, enhancing ultrafiltration pressure

Question 2

The following are the main methods used to clear low-molecular-weight compounds via dialysis:

Accepted Answer

diffusion

Answer

solvent drag

Answer

convection

Answer

adsorption

Question 3

A dialyzer's molecular weight cutoff is 12,000 daltons. Which of the following compounds would not be able to cross the dialysate membrane?

Accepted Answer

albumin

Answer

urea

Answer

sodium

Answer

phosphate

Question 4

A dialyzer's ultrafiltration coefficient relates to the:

Accepted Answer

fluid that passes through the membrane in 1 hour. Fluid that passes through the membrane in 1 hour.

Answer

pressure in the blood compartment needed to force fluid through the membrane.

Answer

pressure difference across the membrane.

Answer

fluid that passes through the membrane in 1 minute.

Question 5

What exemplifies biocompatibility the best is:

Accepted Answer

reprocessed dialyzers that have a better biocompatibility than new ones.

Answer

independence from protein adsorption of the membrane.

Answer

reprocessed dialyzers that have a lower biocompatibility than new ones.

Answer

synthetic membranes that do not adsorb blood proteins as well as cellulose membranes

Question 6

One body part's water can be transferred to another by:

Accepted Answer

osmotic forces

Answer

ultrafiltration

Answer

active transport

Answer

all of the above

Question 7

The following are referred to as the "sieving coefficient of a membrane":

Accepted Answer

fraction of solute that passes through the membrane by convection.

Answer

size of the pores in the membrane.

Answer

amount of water required for solute drag through the membrane.

Answer

concentration of pores in the membrane.