Certified Hemodialysis Technologist/Technician Exam Dialysis Adequacy and Prescription 2

Question 1

What is a patient's 'dry weight' in the context of hemodialysis?

Accepted Answer

The lowest weight a patient can tolerate without experiencing hypotension or cramps

Answer

Dry weight (target weight) is the post-dialysis weight at which the patient is euvolemic and does not exhibit signs of over- or under-hydration.

Question 2

The maximum recommended ultrafiltration rate to minimize intradialytic hypotension and cardiovascular stress is:

Accepted Answer

13 mL/kg/hour

Answer

CMS and clinical guidelines recommend keeping ultrafiltration rates below 13 mL/kg/hour to reduce cardiovascular complications and intradialytic hypotension.

Question 3

Which parameter reflects the ability of a dialyzer to clear small molecules like urea through diffusion?

Accepted Answer

KoA (mass transfer area coefficient)

Answer

KoA (mass transfer area coefficient) is the product of membrane permeability and surface area, determining diffusive clearance of small solutes.

Question 4

A dialysis patient has a pre-BUN of 80 mg/dL and a post-BUN of 20 mg/dL. What is the URR?

Accepted Answer

75%

Answer

(80 − 20) ÷ 80 × 100 = 60 ÷ 80 × 100 = 75%, indicating adequate dialysis.

Question 5

Which factor decreases dialysis adequacy (Kt/V) if all other parameters remain constant?

Accepted Answer

Increased access recirculation

Answer

Access recirculation reduces the effective clearance of urea by mixing dialyzed blood back into the arterial draw, lowering effective Kt/V.

Certified Hemodialysis Technologist/Technician Exam Practice Test

Certified Hemodialysis Technologist/Technician Exam Practice Test

Certified Hemodialysis Technologist/Technician Exam Dialysis Adequacy and Prescription 2