Maryland Dialysis Technician
Certification Exam Practice Questions
And Correct Answers (Verified Answers)
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1. A dialysis technician is preparing a patient for hemodialysis. Which of
the following best describes the primary function of the dialyzer
during the procedure?
A. It increases blood pressure through filtration
B. It acts as an artificial kidney to remove waste and excess fluid
C. It delivers medications directly into the bloodstream
D. It oxygenates blood similarly to the lungs
Answer: B
Rationale: The dialyzer serves as an artificial kidney, removing
, metabolic waste products and excess fluids from the blood through
diffusion and ultrafiltration.
2. During hemodialysis, diffusion is best described as which of the
following processes?
A. Movement of fluid due to pressure differences
B. Movement of solutes from high to low concentration
C. Active transport requiring energy
D. Filtration of blood cells
Answer: B
Rationale: Diffusion is the passive movement of solutes across a
semipermeable membrane from an area of higher concentration to
an area of lower concentration.
3. Ultrafiltration during dialysis primarily removes which of the
following?
A. Electrolytes only
B. Blood cells
C. Excess fluid
D. Proteins
Answer: C
Rationale: Ultrafiltration removes excess fluid from the bloodstream
using pressure gradients across the dialyzer membrane.
4. Which vascular access is considered the gold standard for long-term
hemodialysis?
, A. Central venous catheter
B. Arteriovenous fistula
C. Peripherally inserted central catheter
D. Subclavian vein access
Answer: B
Rationale: An arteriovenous fistula is preferred due to lower infection
risk and better long-term patency.
5. A patient complains of dizziness and nausea during dialysis. What is
the most likely complication?
A. Hypertension
B. Dialysis disequilibrium syndrome
C. Hyperkalemia
D. Fluid overload
Answer: B
Rationale: Dialysis disequilibrium syndrome can cause neurological
symptoms due to rapid changes in solute concentrations.
6. Which electrolyte imbalance is most dangerous and commonly
corrected during dialysis?
A. Hypercalcemia
B. Hypokalemia
C. Hyperkalemia
D. Hyponatremia
Answer: C
, Rationale: Hyperkalemia can lead to life-threatening cardiac
arrhythmias and is a key focus during dialysis.
7. What is the primary purpose of heparin during hemodialysis?
A. Increase blood pressure
B. Prevent clotting in the extracorporeal circuit
C. Enhance filtration rate
D. Reduce infection risk
Answer: B
Rationale: Heparin is used to prevent clot formation in the dialysis
circuit.
8. Which symptom indicates fluid overload in a dialysis patient?
A. Dry skin
B. Hypotension
C. Edema and shortness of breath
D. Decreased urine output only
Answer: C
Rationale: Fluid overload manifests as edema and respiratory
distress due to pulmonary congestion.
9. What is the normal blood flow rate range during hemodialysis?
A. 50–100 mL/min
B. 100–200 mL/min
C. 300–500 mL/min
D. 600–800 mL/min
Certification Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationale 2026 Q&A| Instant
Download Pdf
1. A dialysis technician is preparing a patient for hemodialysis. Which of
the following best describes the primary function of the dialyzer
during the procedure?
A. It increases blood pressure through filtration
B. It acts as an artificial kidney to remove waste and excess fluid
C. It delivers medications directly into the bloodstream
D. It oxygenates blood similarly to the lungs
Answer: B
Rationale: The dialyzer serves as an artificial kidney, removing
, metabolic waste products and excess fluids from the blood through
diffusion and ultrafiltration.
2. During hemodialysis, diffusion is best described as which of the
following processes?
A. Movement of fluid due to pressure differences
B. Movement of solutes from high to low concentration
C. Active transport requiring energy
D. Filtration of blood cells
Answer: B
Rationale: Diffusion is the passive movement of solutes across a
semipermeable membrane from an area of higher concentration to
an area of lower concentration.
3. Ultrafiltration during dialysis primarily removes which of the
following?
A. Electrolytes only
B. Blood cells
C. Excess fluid
D. Proteins
Answer: C
Rationale: Ultrafiltration removes excess fluid from the bloodstream
using pressure gradients across the dialyzer membrane.
4. Which vascular access is considered the gold standard for long-term
hemodialysis?
, A. Central venous catheter
B. Arteriovenous fistula
C. Peripherally inserted central catheter
D. Subclavian vein access
Answer: B
Rationale: An arteriovenous fistula is preferred due to lower infection
risk and better long-term patency.
5. A patient complains of dizziness and nausea during dialysis. What is
the most likely complication?
A. Hypertension
B. Dialysis disequilibrium syndrome
C. Hyperkalemia
D. Fluid overload
Answer: B
Rationale: Dialysis disequilibrium syndrome can cause neurological
symptoms due to rapid changes in solute concentrations.
6. Which electrolyte imbalance is most dangerous and commonly
corrected during dialysis?
A. Hypercalcemia
B. Hypokalemia
C. Hyperkalemia
D. Hyponatremia
Answer: C
, Rationale: Hyperkalemia can lead to life-threatening cardiac
arrhythmias and is a key focus during dialysis.
7. What is the primary purpose of heparin during hemodialysis?
A. Increase blood pressure
B. Prevent clotting in the extracorporeal circuit
C. Enhance filtration rate
D. Reduce infection risk
Answer: B
Rationale: Heparin is used to prevent clot formation in the dialysis
circuit.
8. Which symptom indicates fluid overload in a dialysis patient?
A. Dry skin
B. Hypotension
C. Edema and shortness of breath
D. Decreased urine output only
Answer: C
Rationale: Fluid overload manifests as edema and respiratory
distress due to pulmonary congestion.
9. What is the normal blood flow rate range during hemodialysis?
A. 50–100 mL/min
B. 100–200 mL/min
C. 300–500 mL/min
D. 600–800 mL/min
