DaVita Kidney Care Exam Questions and
Answers with Rationale 2026/2027
Question 1
What is the primary function of the extracorporeal circuit during
a hemodialysis treatment?
A) To replace all hormonal and endocrine functions of failing
kidneys permanently
B) To transport the patient's blood safely from their vascular
access through the dialyzer and back into their circulation
C) To manufacture erythropoietin and active vitamin D directly
inside the machine monitor
D) To filter solid metabolic waste products entirely through
chemical digestion
Answer: B
Rationale: The extracorporeal circuit consists of the blood
tubing lines, dialyzer, and blood pump, which work together to
safely route blood outside the body for cleansing and fluid
removal before returning it to the patient.
Question 2
What is the correct action if a Patient Care Technician notices a
high arterial pre-pump pressure alarm indicating excessive
negative pressure?
,A) Check the arterial blood line for kinking, evaluate needle
placement for positional obstruction, or assess the vascular
access for poor blood flow
B) Increase the blood pump speed to maximum capacity to force
blood through the restriction
C) Open the venous line clamp fully to release the pressure into
the room
D) Turn off the arterial pressure monitor and ignore the alarm
Answer: A
Rationale: High negative arterial pre-pump pressure signifies
excessive resistance or restriction upstream from the blood
pump inlet, typically caused by a kinked arterial line, a poorly
positioned needle, or inadequate vascular access flow.
Question 3
Why is it essential to perform total chlorine and chloramines
testing prior to the first patient shift every treatment day?
A) To calculate the monthly utility bill for the facility's water
consumption
B) To ensure that the carbon adsorption tanks have not
exhausted their capacity and that toxic chemicals are completely
removed to prevent acute hemolysis
C) To determine the exact amount of heparin required for the
day's procedures
,D) To measure the room temperature and humidity levels in the
clinic
Answer: B
Rationale: Total chlorine and chloramines are toxic oxidizers
that destroy red blood cell membranes on contact; daily pre-shift
testing ensures breakthrough does not occur, protecting patients
from fatal acute hemolytic anemia.
Question 4
What is the primary purpose of the conductivity meter in a
hemodialysis proportioning system?
A) To measure the total ionic concentration of the mixed
dialysate to ensure it is within safe physiological limits before
reaching the dialyzer
B) To calculate the patient's monthly Kt/V adequacy score
automatically
C) To determine the total volume of wastewater discharged into
the municipal sewer
D) To test the electrical grounding of the treatment chair
Answer: A
Rationale: Conductivity monitoring verifies that the acid
concentrate, bicarbonate, and purified water have been
proportioned to the correct ionic concentration required for safe
patient treatment.
, Question 5
What is the recommended intervention when a patient
experiences severe cramping due to rapid fluid removal near the
end of a hemodialysis session?
A) Increase the ultrafiltration rate to finish the treatment faster
B) Notify the licensed nurse and administer a prescribed discrete
bolus of normal saline while evaluating the ultrafiltration goal
and target dry weight
C) Stop the blood pump permanently and discard the entire
circuit without returning blood
D) Disconnect the patient immediately and send them home
without further assessment
Answer: B
Rationale: Delivering a small, physician-approved bolus of
normal saline under nurse supervision helps restore intravascular
volume and alleviate painful muscle cramps caused by excessive
ultrafiltration.
Question 6
What is the primary purpose of the water softener in a standard
hemodialysis water treatment system?
A) To remove dissolved calcium and magnesium ions via ion
exchange, preventing scale formation on downstream equipment
like reverse osmosis membranes
Answers with Rationale 2026/2027
Question 1
What is the primary function of the extracorporeal circuit during
a hemodialysis treatment?
A) To replace all hormonal and endocrine functions of failing
kidneys permanently
B) To transport the patient's blood safely from their vascular
access through the dialyzer and back into their circulation
C) To manufacture erythropoietin and active vitamin D directly
inside the machine monitor
D) To filter solid metabolic waste products entirely through
chemical digestion
Answer: B
Rationale: The extracorporeal circuit consists of the blood
tubing lines, dialyzer, and blood pump, which work together to
safely route blood outside the body for cleansing and fluid
removal before returning it to the patient.
Question 2
What is the correct action if a Patient Care Technician notices a
high arterial pre-pump pressure alarm indicating excessive
negative pressure?
,A) Check the arterial blood line for kinking, evaluate needle
placement for positional obstruction, or assess the vascular
access for poor blood flow
B) Increase the blood pump speed to maximum capacity to force
blood through the restriction
C) Open the venous line clamp fully to release the pressure into
the room
D) Turn off the arterial pressure monitor and ignore the alarm
Answer: A
Rationale: High negative arterial pre-pump pressure signifies
excessive resistance or restriction upstream from the blood
pump inlet, typically caused by a kinked arterial line, a poorly
positioned needle, or inadequate vascular access flow.
Question 3
Why is it essential to perform total chlorine and chloramines
testing prior to the first patient shift every treatment day?
A) To calculate the monthly utility bill for the facility's water
consumption
B) To ensure that the carbon adsorption tanks have not
exhausted their capacity and that toxic chemicals are completely
removed to prevent acute hemolysis
C) To determine the exact amount of heparin required for the
day's procedures
,D) To measure the room temperature and humidity levels in the
clinic
Answer: B
Rationale: Total chlorine and chloramines are toxic oxidizers
that destroy red blood cell membranes on contact; daily pre-shift
testing ensures breakthrough does not occur, protecting patients
from fatal acute hemolytic anemia.
Question 4
What is the primary purpose of the conductivity meter in a
hemodialysis proportioning system?
A) To measure the total ionic concentration of the mixed
dialysate to ensure it is within safe physiological limits before
reaching the dialyzer
B) To calculate the patient's monthly Kt/V adequacy score
automatically
C) To determine the total volume of wastewater discharged into
the municipal sewer
D) To test the electrical grounding of the treatment chair
Answer: A
Rationale: Conductivity monitoring verifies that the acid
concentrate, bicarbonate, and purified water have been
proportioned to the correct ionic concentration required for safe
patient treatment.
, Question 5
What is the recommended intervention when a patient
experiences severe cramping due to rapid fluid removal near the
end of a hemodialysis session?
A) Increase the ultrafiltration rate to finish the treatment faster
B) Notify the licensed nurse and administer a prescribed discrete
bolus of normal saline while evaluating the ultrafiltration goal
and target dry weight
C) Stop the blood pump permanently and discard the entire
circuit without returning blood
D) Disconnect the patient immediately and send them home
without further assessment
Answer: B
Rationale: Delivering a small, physician-approved bolus of
normal saline under nurse supervision helps restore intravascular
volume and alleviate painful muscle cramps caused by excessive
ultrafiltration.
Question 6
What is the primary purpose of the water softener in a standard
hemodialysis water treatment system?
A) To remove dissolved calcium and magnesium ions via ion
exchange, preventing scale formation on downstream equipment
like reverse osmosis membranes
