PAT I E N T C A R E T E C H N I C I A N E D U C AT I O N
DAVITA PCT
FINAL EXAMINATION
Comprehensive examination covering hemodialysis
principles, infection control, vascular access care, water
treatment systems, intradialytic complications,
medication management, and clinical application
scenarios aligned with CMS Conditions for Coverage.
2026/2027 Training Standards
150 Questions with Verified Answers
Aligned with CMS V-Tag Regulations
, DaVita PCT Final Exam Questions and Answers
2026/2027 Edition | 150 Verified Questions | CMS Aligned
Section 1: Kidney Anatomy, Physiology, and ESRD Fundamentals (Q1-Q20)
Q1: Which of the following is the basic structural and functional unit of the kidney?
A. Renal corpuscle
B. Nephron [CORRECT]
C. Glomerulus
D. Collecting duct
Correct Answer: B
Rationale: The nephron is the basic structural and functional unit of the kidney, with approximately one million nephrons per kidney.
Each nephron consists of a renal corpuscle and a renal tubule, working together to filter blood, reabsorb essential substances, and secrete
waste products into the filtrate.
Q2: A patient's GFR is measured at 12 mL/min/1.73m squared. Which stage of chronic kidney disease
does this represent?
A. Stage 3b CKD
B. Stage 4 CKD
C. Stage 5 CKD / ESRD [CORRECT]
D. Stage 2 CKD
Correct Answer: C
Rationale: A GFR of less than 15 mL/min/1.73m squared indicates Stage 5 CKD, also known as End-Stage Renal Disease (ESRD). At
this stage, the kidneys can no longer adequately filter waste and excess fluid, and the patient requires renal replacement therapy such as
hemodialysis or kidney transplantation to survive.
Q3: Which endocrine function of the kidney is responsible for stimulating red blood cell production in the
bone marrow?
A. Secretion of renin
B. Activation of Vitamin D to calcitriol
C. Production of erythropoietin (EPO) [CORRECT]
D. Secretion of aldosterone
Correct Answer: C
Rationale: The kidneys produce erythropoietin (EPO) in response to decreased oxygen delivery. EPO stimulates the bone marrow to
produce red blood cells, and decreased EPO production in CKD leads to anemia, a common complication requiring EPO-stimulating
agents in dialysis patients.
Q4: Left ventricular hypertrophy (LVH) in ESRD patients is most directly associated with which of the
following?
A. Decreased cardiac output from anemia
B. Chronic volume overload and hypertension [CORRECT]
C. Low serum calcium levels
D. Elevated serum albumin
Correct Answer: B
Rationale: LVH is the thickening of the heart's lower left pumping chamber and is primarily caused by chronic volume overload and
hypertension in ESRD patients. LVH leads to increased risk of ischemic heart disease, arrhythmia, myocardial infarction, and sudden
,cardiac death, making fluid management during dialysis critically important.
Q5: Which electrolyte imbalance is most commonly associated with CKD-MBD (Chronic Kidney
Disease-Mineral and Bone Disorder)?
A. Hypernatremia and hypokalemia
B. Abnormalities in calcium, phosphorus, PTH, and Vitamin D metabolism [CORRECT]
C. Elevated magnesium and decreased chloride
D. Hyperchloremic metabolic alkalosis
Correct Answer: B
Rationale: CKD-MBD involves a constellation of abnormalities including deranged calcium, phosphorus, parathyroid hormone (PTH),
and Vitamin D metabolism. As kidney function declines, phosphorus retention increases, calcium levels drop, PTH rises (secondary
hyperparathyroidism), and the activation of Vitamin D to calcitriol is impaired, leading to bone disease and vascular calcification.
Q6: The renin-angiotensin-aldosterone system (RAAS) begins with the secretion of renin from which part
of the kidney?
A. Proximal convoluted tubule
B. Loop of Henle
C. Juxtaglomerular cells of the afferent arteriole [CORRECT]
D. Distal convoluted tubule
Correct Answer: C
Rationale: Renin is secreted by the juxtaglomerular cells located in the walls of the afferent arterioles, near the glomerulus. When renal
perfusion pressure drops, these cells release renin, which converts angiotensinogen to angiotensin I, ultimately leading to angiotensin II
production and aldosterone secretion, causing vasoconstriction and sodium retention.
Q7: Which excretory function of the kidney is primarily responsible for removing waste products such as
urea and creatinine?
A. Ultrafiltration
B. Diffusion [CORRECT]
C. Active tubular secretion
D. Osmosis
Correct Answer: B
Rationale: Diffusion is the primary method for removing small solutes such as urea and creatinine during dialysis, as these molecules
move from an area of higher concentration in the blood to lower concentration in the dialysate. While the healthy kidney uses both
glomerular filtration and tubular secretion for waste removal, diffusion during hemodialysis mimics this excretory function.
Q8: A dialysis patient presents with low serum calcium, elevated phosphorus, and elevated PTH. Which
condition best describes this presentation?
A. Primary hyperparathyroidism
B. Secondary hyperparathyroidism due to CKD [CORRECT]
C. Tertiary hyperparathyroidism
D. Hypoparathyroidism
Correct Answer: B
Rationale: Secondary hyperparathyroidism in CKD results from decreased phosphate excretion, reduced calcitriol production, and
hypocalcemia. The parathyroid glands respond by overproducing PTH in an attempt to normalize serum calcium, leading to bone
demineralization and elevated PTH levels that require management with phosphate binders, Vitamin D analogs, and calcimimetics.
Q9: Calcitriol, the active form of Vitamin D, is produced through which process in the kidneys?
A. The glomerulus filters active Vitamin D directly
B. The kidneys add a hydroxyl group to 25-hydroxyvitamin D [CORRECT]
C. The proximal tubule converts Vitamin D2 to Vitamin D3
D. The distal tubule secretes calcitriol into the blood
, Correct Answer: B
Rationale: The kidneys play a critical endocrine role by adding a second hydroxyl group to 25-hydroxyvitamin D (calcifediol) in the
proximal tubule, converting it to the biologically active 1,25-dihydroxyvitamin D (calcitriol). Calcitriol promotes calcium absorption in
the intestines and regulates bone metabolism, and its deficiency in CKD contributes to CKD-MBD.
Q10: A patient with ESRD has a dry weight of 70 kg and arrives for treatment weighing 74.2 kg. What is
the interdialytic weight gain (IDWG) percentage?
A. 4.2%
B. 6.0% [CORRECT]
C. 5.7%
D. 3.8%
Correct Answer: B
Rationale: IDWG percentage is calculated as (current weight minus dry weight) divided by dry weight, multiplied by 100. In this case,
(74.2 - 70) / 70 x 100 = 6.0%. An IDWG greater than 5% of target weight is considered excessive and indicates the patient is consuming
too much fluid between treatments, which increases the risk of fluid overload, hypertension, and intradialytic hypotension.
Q11: Which of the following best describes the role of ultrafiltration in normal kidney function?
A. Movement of solutes from high to low concentration
B. Controlled removal of fluid by hydrostatic pressure [CORRECT]
C. Movement of fluid toward higher solute concentration
D. Transport of large proteins across the glomerular membrane
Correct Answer: B
Rationale: Ultrafiltration is the process of controlled fluid removal driven by hydrostatic pressure differentials. In the normal kidney,
glomerular hydrostatic pressure forces fluid and small solutes across the glomerular filtration membrane. During hemodialysis,
ultrafiltration is manipulated to remove excess fluid that the failing kidneys cannot excrete.
Q12: What is the approximate number of nephrons in each healthy human kidney?
A. 500,000
B. 1 million [CORRECT]
C. 2 million
D. 250,000
Correct Answer: B
Rationale: Each healthy human kidney contains approximately one million nephrons. These microscopic filtering units are responsible
for all kidney functions including filtration, reabsorption, and secretion. Nephron number declines with age and disease, and patients
with fewer functioning nephrons experience more rapid progression of kidney disease.
Q13: A PCT is educating a patient about the endocrine functions of the kidneys. Which of the following is
NOT an endocrine function of the kidneys?
A. Erythropoietin production
B. Renin secretion
C. Activation of Vitamin D
D. Insulin production [CORRECT]
Correct Answer: D
Rationale: Insulin is produced by the beta cells of the pancreas, not the kidneys. The three major endocrine functions of the kidneys are
erythropoietin (EPO) production for red blood cell stimulation, renin secretion for blood pressure regulation via the RAAS system, and
activation of Vitamin D to calcitriol for calcium and bone metabolism.
Q14: Which type of kidney disease is characterized by a gradual loss of kidney function over months to
years?
A. Acute kidney injury (AKI)
B. Chronic kidney disease (CKD) [CORRECT]
DAVITA PCT
FINAL EXAMINATION
Comprehensive examination covering hemodialysis
principles, infection control, vascular access care, water
treatment systems, intradialytic complications,
medication management, and clinical application
scenarios aligned with CMS Conditions for Coverage.
2026/2027 Training Standards
150 Questions with Verified Answers
Aligned with CMS V-Tag Regulations
, DaVita PCT Final Exam Questions and Answers
2026/2027 Edition | 150 Verified Questions | CMS Aligned
Section 1: Kidney Anatomy, Physiology, and ESRD Fundamentals (Q1-Q20)
Q1: Which of the following is the basic structural and functional unit of the kidney?
A. Renal corpuscle
B. Nephron [CORRECT]
C. Glomerulus
D. Collecting duct
Correct Answer: B
Rationale: The nephron is the basic structural and functional unit of the kidney, with approximately one million nephrons per kidney.
Each nephron consists of a renal corpuscle and a renal tubule, working together to filter blood, reabsorb essential substances, and secrete
waste products into the filtrate.
Q2: A patient's GFR is measured at 12 mL/min/1.73m squared. Which stage of chronic kidney disease
does this represent?
A. Stage 3b CKD
B. Stage 4 CKD
C. Stage 5 CKD / ESRD [CORRECT]
D. Stage 2 CKD
Correct Answer: C
Rationale: A GFR of less than 15 mL/min/1.73m squared indicates Stage 5 CKD, also known as End-Stage Renal Disease (ESRD). At
this stage, the kidneys can no longer adequately filter waste and excess fluid, and the patient requires renal replacement therapy such as
hemodialysis or kidney transplantation to survive.
Q3: Which endocrine function of the kidney is responsible for stimulating red blood cell production in the
bone marrow?
A. Secretion of renin
B. Activation of Vitamin D to calcitriol
C. Production of erythropoietin (EPO) [CORRECT]
D. Secretion of aldosterone
Correct Answer: C
Rationale: The kidneys produce erythropoietin (EPO) in response to decreased oxygen delivery. EPO stimulates the bone marrow to
produce red blood cells, and decreased EPO production in CKD leads to anemia, a common complication requiring EPO-stimulating
agents in dialysis patients.
Q4: Left ventricular hypertrophy (LVH) in ESRD patients is most directly associated with which of the
following?
A. Decreased cardiac output from anemia
B. Chronic volume overload and hypertension [CORRECT]
C. Low serum calcium levels
D. Elevated serum albumin
Correct Answer: B
Rationale: LVH is the thickening of the heart's lower left pumping chamber and is primarily caused by chronic volume overload and
hypertension in ESRD patients. LVH leads to increased risk of ischemic heart disease, arrhythmia, myocardial infarction, and sudden
,cardiac death, making fluid management during dialysis critically important.
Q5: Which electrolyte imbalance is most commonly associated with CKD-MBD (Chronic Kidney
Disease-Mineral and Bone Disorder)?
A. Hypernatremia and hypokalemia
B. Abnormalities in calcium, phosphorus, PTH, and Vitamin D metabolism [CORRECT]
C. Elevated magnesium and decreased chloride
D. Hyperchloremic metabolic alkalosis
Correct Answer: B
Rationale: CKD-MBD involves a constellation of abnormalities including deranged calcium, phosphorus, parathyroid hormone (PTH),
and Vitamin D metabolism. As kidney function declines, phosphorus retention increases, calcium levels drop, PTH rises (secondary
hyperparathyroidism), and the activation of Vitamin D to calcitriol is impaired, leading to bone disease and vascular calcification.
Q6: The renin-angiotensin-aldosterone system (RAAS) begins with the secretion of renin from which part
of the kidney?
A. Proximal convoluted tubule
B. Loop of Henle
C. Juxtaglomerular cells of the afferent arteriole [CORRECT]
D. Distal convoluted tubule
Correct Answer: C
Rationale: Renin is secreted by the juxtaglomerular cells located in the walls of the afferent arterioles, near the glomerulus. When renal
perfusion pressure drops, these cells release renin, which converts angiotensinogen to angiotensin I, ultimately leading to angiotensin II
production and aldosterone secretion, causing vasoconstriction and sodium retention.
Q7: Which excretory function of the kidney is primarily responsible for removing waste products such as
urea and creatinine?
A. Ultrafiltration
B. Diffusion [CORRECT]
C. Active tubular secretion
D. Osmosis
Correct Answer: B
Rationale: Diffusion is the primary method for removing small solutes such as urea and creatinine during dialysis, as these molecules
move from an area of higher concentration in the blood to lower concentration in the dialysate. While the healthy kidney uses both
glomerular filtration and tubular secretion for waste removal, diffusion during hemodialysis mimics this excretory function.
Q8: A dialysis patient presents with low serum calcium, elevated phosphorus, and elevated PTH. Which
condition best describes this presentation?
A. Primary hyperparathyroidism
B. Secondary hyperparathyroidism due to CKD [CORRECT]
C. Tertiary hyperparathyroidism
D. Hypoparathyroidism
Correct Answer: B
Rationale: Secondary hyperparathyroidism in CKD results from decreased phosphate excretion, reduced calcitriol production, and
hypocalcemia. The parathyroid glands respond by overproducing PTH in an attempt to normalize serum calcium, leading to bone
demineralization and elevated PTH levels that require management with phosphate binders, Vitamin D analogs, and calcimimetics.
Q9: Calcitriol, the active form of Vitamin D, is produced through which process in the kidneys?
A. The glomerulus filters active Vitamin D directly
B. The kidneys add a hydroxyl group to 25-hydroxyvitamin D [CORRECT]
C. The proximal tubule converts Vitamin D2 to Vitamin D3
D. The distal tubule secretes calcitriol into the blood
, Correct Answer: B
Rationale: The kidneys play a critical endocrine role by adding a second hydroxyl group to 25-hydroxyvitamin D (calcifediol) in the
proximal tubule, converting it to the biologically active 1,25-dihydroxyvitamin D (calcitriol). Calcitriol promotes calcium absorption in
the intestines and regulates bone metabolism, and its deficiency in CKD contributes to CKD-MBD.
Q10: A patient with ESRD has a dry weight of 70 kg and arrives for treatment weighing 74.2 kg. What is
the interdialytic weight gain (IDWG) percentage?
A. 4.2%
B. 6.0% [CORRECT]
C. 5.7%
D. 3.8%
Correct Answer: B
Rationale: IDWG percentage is calculated as (current weight minus dry weight) divided by dry weight, multiplied by 100. In this case,
(74.2 - 70) / 70 x 100 = 6.0%. An IDWG greater than 5% of target weight is considered excessive and indicates the patient is consuming
too much fluid between treatments, which increases the risk of fluid overload, hypertension, and intradialytic hypotension.
Q11: Which of the following best describes the role of ultrafiltration in normal kidney function?
A. Movement of solutes from high to low concentration
B. Controlled removal of fluid by hydrostatic pressure [CORRECT]
C. Movement of fluid toward higher solute concentration
D. Transport of large proteins across the glomerular membrane
Correct Answer: B
Rationale: Ultrafiltration is the process of controlled fluid removal driven by hydrostatic pressure differentials. In the normal kidney,
glomerular hydrostatic pressure forces fluid and small solutes across the glomerular filtration membrane. During hemodialysis,
ultrafiltration is manipulated to remove excess fluid that the failing kidneys cannot excrete.
Q12: What is the approximate number of nephrons in each healthy human kidney?
A. 500,000
B. 1 million [CORRECT]
C. 2 million
D. 250,000
Correct Answer: B
Rationale: Each healthy human kidney contains approximately one million nephrons. These microscopic filtering units are responsible
for all kidney functions including filtration, reabsorption, and secretion. Nephron number declines with age and disease, and patients
with fewer functioning nephrons experience more rapid progression of kidney disease.
Q13: A PCT is educating a patient about the endocrine functions of the kidneys. Which of the following is
NOT an endocrine function of the kidneys?
A. Erythropoietin production
B. Renin secretion
C. Activation of Vitamin D
D. Insulin production [CORRECT]
Correct Answer: D
Rationale: Insulin is produced by the beta cells of the pancreas, not the kidneys. The three major endocrine functions of the kidneys are
erythropoietin (EPO) production for red blood cell stimulation, renin secretion for blood pressure regulation via the RAAS system, and
activation of Vitamin D to calcitriol for calcium and bone metabolism.
Q14: Which type of kidney disease is characterized by a gradual loss of kidney function over months to
years?
A. Acute kidney injury (AKI)
B. Chronic kidney disease (CKD) [CORRECT]
