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HEMODIALYSIS BONENT CERTIFICATION EXAM LATEST
VERSION QUESTIONS AND ANSWERS 2026 EDITION
HEMODIALYSIS BONENT CERTIFICATION EXAM: 250 PRACTICE QUESTIONS WITH
RATIONALES
10-POINT SUMMARIZED EXAM COVERAGE
1. Renal Anatomy, Physiology, and CKD – Kidney structure/nephron function,
glomerular filtration, CKD classification per KDIGO (G1-G5), uremic syndrome
manifestations, and the pathophysiology of kidney failure leading to dialysis.
2. Hemodialysis Principles – Diffusion, osmosis, and ultrafiltration principles;
dialyzer function as an artificial kidney; countercurrent flow; and the physics of
solute and fluid removal.
3. Vascular Access – AV fistula (gold standard), AV graft, central venous catheters
(tunneled/non-tunneled); cannulation techniques (rope ladder, buttonhole);
access assessment (bruit, thrill); and access complications (infection,
thrombosis, stenosis, aneurysm).
4. Water Treatment and Dialysate – AAMI water quality standards; components of
the water treatment system (sediment filter, carbon tanks, reverse osmosis,
deionization, UV); monitoring chlorine/chloramines; dialysate composition and
conductivity; and bicarbonate buffer systems.
5. Dialysis Equipment and Technology – Machine setup and priming;
arterial/venous pressure monitoring; transmembrane pressure (TMP);
ultrafiltration rate (UFR); blood pump and flow rates; conductivity and
temperature alarms; and routine preventive maintenance.
6. Anticoagulation and Medication Administration – Heparin use (loading dose,
continuous infusion, saline flushes); monitoring coagulation (ACT); protamine
sulfate reversal; erythropoiesis-stimulating agents (ESA); iron therapy;
phosphate binders; and vitamin D analogs.
7. Intradialytic Complications – Hypotension (most common), muscle cramps,
nausea/vomiting, headache, chest pain, air embolism, hemolysis, dialyzer
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reactions (Type A anaphylaxis vs. Type B), pyrogenic reactions, bleeding, and
disequilibrium syndrome.
8. Infection Control and Safety – Standard and dialysis-specific precautions; PPE
use; hand hygiene; hepatitis B surveillance and isolation; cleaning/disinfecting
stations and equipment; proper waste disposal; and patient separation
protocols.
9. Patient Education and Professional Development – Diet/fluid restrictions,
medication adherence, access care, self-cannulation, treatment modality
education, professional ethics, documentation, and QAPI participation.
10. Transplantation and Other Modalities – Kidney transplant evaluation and
types; peritoneal dialysis principles; home hemodialysis; acute renal failure
treatment; psychosocial implications of ESRD; and palliative/end-of-life
considerations.
QUESTIONS 1-50: RENAL ANATOMY, PHYSIOLOGY, AND CKD
1. According to the KDIGO 2024 CKD classification, a patient with an eGFR of 22
mL/min/1.73 m² falls into which CKD stage?
A. Stage G2
B. Stage G3a
C. Stage G3b
D. Stage G4
Correct Answer: D
Rationale: CKD stage G4 is defined as an eGFR of 15-29 mL/min/1.73 m², indicating
severely decreased GFR . Patients in stage G4 are typically referred to nephrology for
transplant evaluation and dialysis access planning before stage G5 (eGFR <15) when
renal replacement therapy is usually initiated.
2. A predialysis CKD patient reports fatigue, pruritus, anorexia, and a metallic
taste. The nurse recognizes these as classic signs of:
A. Hypocalcemia
B. Uremic syndrome
C. Iron deficiency anemia
D. Acute glomerulonephritis
Correct Answer: B
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Rationale: Uremic syndrome results from accumulation of nitrogenous wastes and
middle molecules when GFR is severely reduced . Hallmark symptoms include fatigue,
pruritus, anorexia, nausea, metallic or 'fishy' taste (uremic fetor), pericarditis, and
asterixis. Persistent uremic symptoms despite optimal medical therapy are an
indication to initiate dialysis.
3. Which equation does the National Kidney Foundation currently recommend for
estimating GFR in adults using serum creatinine?
A. Cockcroft-Gault formula
B. MDRD 4-variable equation
C. CKD-EPI 2021 creatinine equation (race-free)
D. Schwartz pediatric formula
Correct Answer: C
Rationale: The CKD-EPI 2021 creatinine equation, which removed the race coefficient,
is the current NKF/ASN recommended equation for estimating GFR in adults . It uses
age, sex, and serum creatinine. The race-free version was endorsed in 2021 to address
health-equity concerns with the prior race coefficient.
4. Per KDIGO 2017 CKD-MBD guidelines, which laboratory pattern is characteristic
of secondary hyperparathyroidism in advanced CKD?
A. Elevated calcium, low phosphate, low PTH
B. Low calcium, elevated phosphate, elevated PTH
C. Elevated calcium, elevated phosphate, low PTH
D. Low calcium, low phosphate, elevated PTH
Correct Answer: B
Rationale: Secondary hyperparathyroidism in CKD develops as failing kidneys retain
phosphate and lose the ability to convert vitamin D to its active form (calcitriol) .
Hyperphosphatemia, reduced calcitriol, and resulting hypocalcemia stimulate the
parathyroid glands to secrete PTH. The classic pattern is therefore low calcium,
elevated phosphate, and elevated PTH.
5. Per KDIGO, CKD is defined as abnormalities of kidney structure or function
present for at least:
A. 1 month
B. 3 months
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C. 6 months
D. 12 months
Correct Answer: B
Rationale: KDIGO defines CKD as abnormalities of kidney structure or function present
for >3 months with implications for health . The 3-month criterion distinguishes CKD
from acute kidney injury, which can resolve within days to weeks.
6. A hemodialysis patient has serum phosphate 7.8 mg/dL, calcium 8.6 mg/dL, and
intact PTH 950 pg/mL despite phosphate binders and active vitamin D. Which
medication class most directly suppresses PTH secretion at this point?
A. Loop diuretic
B. Calcimimetic (cinacalcet or etelcalcetide)
C. Beta-blocker
D. Sevelamer carbonate
Correct Answer: B
Rationale: Calcimimetics such as cinacalcet (oral) and etelcalcetide (IV, post-dialysis)
sensitize the calcium-sensing receptor on parathyroid cells, lowering PTH while also
tending to lower calcium and phosphate . They are first-line when PTH remains elevated
despite controlling calcium and phosphate.
7. What is the main job of healthy kidneys?
A. Produce red blood cells
B. Keep the body in homeostasis
C. Digest proteins
D. Regulate blood sugar
Correct Answer: B
Rationale: The kidneys maintain homeostasis by regulating fluid and electrolyte
balance, removing metabolic waste products, and producing hormones such as
erythropoietin and calcitriol . When kidney function fails, these homeostatic
mechanisms are lost.
8. Which parts of a healthy kidney function can dialysis replace?
A. All kidney functions completely
B. Only fluid balance
HEMODIALYSIS BONENT CERTIFICATION EXAM LATEST
VERSION QUESTIONS AND ANSWERS 2026 EDITION
HEMODIALYSIS BONENT CERTIFICATION EXAM: 250 PRACTICE QUESTIONS WITH
RATIONALES
10-POINT SUMMARIZED EXAM COVERAGE
1. Renal Anatomy, Physiology, and CKD – Kidney structure/nephron function,
glomerular filtration, CKD classification per KDIGO (G1-G5), uremic syndrome
manifestations, and the pathophysiology of kidney failure leading to dialysis.
2. Hemodialysis Principles – Diffusion, osmosis, and ultrafiltration principles;
dialyzer function as an artificial kidney; countercurrent flow; and the physics of
solute and fluid removal.
3. Vascular Access – AV fistula (gold standard), AV graft, central venous catheters
(tunneled/non-tunneled); cannulation techniques (rope ladder, buttonhole);
access assessment (bruit, thrill); and access complications (infection,
thrombosis, stenosis, aneurysm).
4. Water Treatment and Dialysate – AAMI water quality standards; components of
the water treatment system (sediment filter, carbon tanks, reverse osmosis,
deionization, UV); monitoring chlorine/chloramines; dialysate composition and
conductivity; and bicarbonate buffer systems.
5. Dialysis Equipment and Technology – Machine setup and priming;
arterial/venous pressure monitoring; transmembrane pressure (TMP);
ultrafiltration rate (UFR); blood pump and flow rates; conductivity and
temperature alarms; and routine preventive maintenance.
6. Anticoagulation and Medication Administration – Heparin use (loading dose,
continuous infusion, saline flushes); monitoring coagulation (ACT); protamine
sulfate reversal; erythropoiesis-stimulating agents (ESA); iron therapy;
phosphate binders; and vitamin D analogs.
7. Intradialytic Complications – Hypotension (most common), muscle cramps,
nausea/vomiting, headache, chest pain, air embolism, hemolysis, dialyzer
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reactions (Type A anaphylaxis vs. Type B), pyrogenic reactions, bleeding, and
disequilibrium syndrome.
8. Infection Control and Safety – Standard and dialysis-specific precautions; PPE
use; hand hygiene; hepatitis B surveillance and isolation; cleaning/disinfecting
stations and equipment; proper waste disposal; and patient separation
protocols.
9. Patient Education and Professional Development – Diet/fluid restrictions,
medication adherence, access care, self-cannulation, treatment modality
education, professional ethics, documentation, and QAPI participation.
10. Transplantation and Other Modalities – Kidney transplant evaluation and
types; peritoneal dialysis principles; home hemodialysis; acute renal failure
treatment; psychosocial implications of ESRD; and palliative/end-of-life
considerations.
QUESTIONS 1-50: RENAL ANATOMY, PHYSIOLOGY, AND CKD
1. According to the KDIGO 2024 CKD classification, a patient with an eGFR of 22
mL/min/1.73 m² falls into which CKD stage?
A. Stage G2
B. Stage G3a
C. Stage G3b
D. Stage G4
Correct Answer: D
Rationale: CKD stage G4 is defined as an eGFR of 15-29 mL/min/1.73 m², indicating
severely decreased GFR . Patients in stage G4 are typically referred to nephrology for
transplant evaluation and dialysis access planning before stage G5 (eGFR <15) when
renal replacement therapy is usually initiated.
2. A predialysis CKD patient reports fatigue, pruritus, anorexia, and a metallic
taste. The nurse recognizes these as classic signs of:
A. Hypocalcemia
B. Uremic syndrome
C. Iron deficiency anemia
D. Acute glomerulonephritis
Correct Answer: B
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Rationale: Uremic syndrome results from accumulation of nitrogenous wastes and
middle molecules when GFR is severely reduced . Hallmark symptoms include fatigue,
pruritus, anorexia, nausea, metallic or 'fishy' taste (uremic fetor), pericarditis, and
asterixis. Persistent uremic symptoms despite optimal medical therapy are an
indication to initiate dialysis.
3. Which equation does the National Kidney Foundation currently recommend for
estimating GFR in adults using serum creatinine?
A. Cockcroft-Gault formula
B. MDRD 4-variable equation
C. CKD-EPI 2021 creatinine equation (race-free)
D. Schwartz pediatric formula
Correct Answer: C
Rationale: The CKD-EPI 2021 creatinine equation, which removed the race coefficient,
is the current NKF/ASN recommended equation for estimating GFR in adults . It uses
age, sex, and serum creatinine. The race-free version was endorsed in 2021 to address
health-equity concerns with the prior race coefficient.
4. Per KDIGO 2017 CKD-MBD guidelines, which laboratory pattern is characteristic
of secondary hyperparathyroidism in advanced CKD?
A. Elevated calcium, low phosphate, low PTH
B. Low calcium, elevated phosphate, elevated PTH
C. Elevated calcium, elevated phosphate, low PTH
D. Low calcium, low phosphate, elevated PTH
Correct Answer: B
Rationale: Secondary hyperparathyroidism in CKD develops as failing kidneys retain
phosphate and lose the ability to convert vitamin D to its active form (calcitriol) .
Hyperphosphatemia, reduced calcitriol, and resulting hypocalcemia stimulate the
parathyroid glands to secrete PTH. The classic pattern is therefore low calcium,
elevated phosphate, and elevated PTH.
5. Per KDIGO, CKD is defined as abnormalities of kidney structure or function
present for at least:
A. 1 month
B. 3 months
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C. 6 months
D. 12 months
Correct Answer: B
Rationale: KDIGO defines CKD as abnormalities of kidney structure or function present
for >3 months with implications for health . The 3-month criterion distinguishes CKD
from acute kidney injury, which can resolve within days to weeks.
6. A hemodialysis patient has serum phosphate 7.8 mg/dL, calcium 8.6 mg/dL, and
intact PTH 950 pg/mL despite phosphate binders and active vitamin D. Which
medication class most directly suppresses PTH secretion at this point?
A. Loop diuretic
B. Calcimimetic (cinacalcet or etelcalcetide)
C. Beta-blocker
D. Sevelamer carbonate
Correct Answer: B
Rationale: Calcimimetics such as cinacalcet (oral) and etelcalcetide (IV, post-dialysis)
sensitize the calcium-sensing receptor on parathyroid cells, lowering PTH while also
tending to lower calcium and phosphate . They are first-line when PTH remains elevated
despite controlling calcium and phosphate.
7. What is the main job of healthy kidneys?
A. Produce red blood cells
B. Keep the body in homeostasis
C. Digest proteins
D. Regulate blood sugar
Correct Answer: B
Rationale: The kidneys maintain homeostasis by regulating fluid and electrolyte
balance, removing metabolic waste products, and producing hormones such as
erythropoietin and calcitriol . When kidney function fails, these homeostatic
mechanisms are lost.
8. Which parts of a healthy kidney function can dialysis replace?
A. All kidney functions completely
B. Only fluid balance
