Certified Hemodialysis Technologist/Technician Exam Dialysis Adequacy and Prescription

Question 1

What does the term 'Kt/V' measure in hemodialysis adequacy?

Accepted Answer

Dose of dialysis delivered, representing urea clearance relative to urea volume of distribution

Answer

Ultrafiltration rate relative to body weight

Answer

Time on dialysis divided by volume of dialysate used

Answer

Blood flow rate times treatment time

Question 2

What is the minimum single-pool Kt/V (spKt/V) recommended by KDOQI for thrice-weekly hemodialysis?

Accepted Answer

1.2

Answer

1.0

Answer

1.4

Answer

1.6

Question 3

URR (urea reduction ratio) is calculated as:

Accepted Answer

(Pre-BUN − Post-BUN) ÷ Pre-BUN × 100

Answer

Post-BUN ÷ Pre-BUN × 100

Answer

Pre-BUN ÷ Post-BUN × 100

Answer

(Post-BUN − Pre-BUN) ÷ Post-BUN × 100

Question 4

A minimum URR of what percentage is recommended for adequate hemodialysis?

Accepted Answer

65%

Answer

45%

Answer

55%

Answer

75%

Question 5

Which blood sample timing is critical for accurate Kt/V calculation?

Accepted Answer

Post-dialysis sample drawn immediately after stopping the blood pump with a slow-flow technique

Answer

Pre-dialysis sample drawn 5 minutes after starting the blood pump

Answer

Post-dialysis sample drawn 30 minutes after treatment ends

Answer

Both samples drawn mid-session

Question 6

Increasing which treatment parameter is the most effective way to improve Kt/V in a hemodialysis patient?

Accepted Answer

Treatment time

Answer

Dialysate sodium concentration

Answer

Ultrafiltration volume

Answer

Heparin dose