Certified Hemodialysis Technologist/Technician Exam Dialysis Equipment and Troubleshooting

Question 1

Which alarm on a hemodialysis machine requires the technician to immediately clamp the blood lines and stop the blood pump?

Accepted Answer

Air detector alarm

Answer

Blood leak alarm

Answer

High venous pressure alarm

Answer

Low arterial pressure alarm

Question 2

What does a high transmembrane pressure (TMP) alarm during dialysis typically indicate?

Accepted Answer

Clotting in the dialyzer

Answer

Air in the blood circuit

Answer

Low blood flow rate

Answer

Inadequate dialysate temperature

Question 3

A venous pressure alarm that is consistently low may indicate which problem?

Accepted Answer

Needle dislodgement from the access

Answer

Kinked venous blood line

Answer

Clotted venous drip chamber

Answer

High blood flow rate

Question 4

What is the purpose of the dialysate bypass system on a hemodialysis machine?

Accepted Answer

Route dialysate past the dialyzer when an alarm condition is detected

Answer

Increase blood flow rate

Answer

Recirculate used dialysate

Answer

Mix concentrate with water

Question 5

Which type of dialyzer membrane is made from synthetic polymer and is generally more biocompatible than cellulosic membranes?

Accepted Answer

Polysulfone

Answer

Cuprophan

Answer

Cellulose acetate

Answer

Regenerated cellulose

Question 6

What does KUF (ultrafiltration coefficient) measure in a dialyzer?

Accepted Answer

Volume of fluid removed per hour per mmHg of TMP

Answer

Clearance of urea per hour

Answer

Blood flow capacity of the dialyzer

Answer

Dialyzer surface area in square meters