CHBT Renal Physiology and Kidney Disease 3

Question 1

Which laboratory value is most commonly used to assess dialysis adequacy (Kt/V)?

Accepted Answer

Blood urea nitrogen (BUN)

Answer

BUN is the primary marker used to calculate Kt/V because urea is freely filtered and its clearance reflects small-molecule uremic toxin removal.

Question 2

What is the minimum recommended spKt/V per treatment for thrice-weekly hemodialysis per KDOQI guidelines?

Accepted Answer

1.2

Answer

KDOQI guidelines recommend a minimum single-pool Kt/V (spKt/V) of 1.2 per treatment for patients on thrice-weekly hemodialysis.

Question 3

Hyperphosphatemia in ESRD patients is managed through dialysis AND:

Accepted Answer

Dietary phosphate restriction and phosphate binders

Answer

Because dialysis alone cannot remove enough phosphate, dietary restriction of phosphate-rich foods and phosphate-binding medications are essential adjuncts.

Question 4

Intradialytic hypotension is most commonly caused by:

Accepted Answer

Excessive ultrafiltration rate exceeding plasma refill capacity

Answer

When fluid is removed faster than the vascular compartment can refill from interstitial fluid, blood volume drops and blood pressure falls.

Question 5

Which condition is described as calcification of blood vessels and soft tissues caused by an elevated calcium-phosphate product in ESRD?

Accepted Answer

Calciphylaxis

Answer

Calciphylaxis is a serious, often fatal complication in ESRD patients characterized by vascular calcification and skin necrosis driven by disordered mineral metabolism.

CHBT - Certified Hemodialysis Bio-Medical Technician Practice Test

CHBT - Certified Hemodialysis Bio-Medical Technician Practice Test

CHBT Renal Physiology and Kidney Disease 3