==============================
EXAM TITLE:DaVita
RN Final Exam Questions | 100% Correct Answers
with Detailed Rationales (2026/2027 Edition)
DaVita Registered Nurse Clinical Competency Examination
==============================
SECTION 1: Hemodialysis Principles and Procedures
Question 1
A nurse is preparing to initiate a hemodialysis treatment for a patient using a Fresenius 2008K
machine. According to DaVita protocol, what is the minimum recommended blood flow rate (Qb) for
an adult patient with a functioning arteriovenous (AV) fistula?
A. 150 mL/min
B. 200 mL/min
C. 250 mL/min
D. 300 mL/min
Correct Answer: C
Rationale: DaVita clinical protocols recommend a minimum blood flow rate of 250 mL/min for adult
patients with a functioning AV fistula to achieve adequate dialysis clearance (Kt/V). Blood flow rates
below 250 mL/min may result in suboptimal urea clearance and reduced dialysis adequacy. Rates of
150-200 mL/min are typically reserved for patients with central venous catheters or those with
hemodynamic instability, while 300 mL/min is often the target for optimal clearance in patients with
adequate vascular access.
------------------------------
Question 2
A DaVita RN is priming a dialyzer and notices that the dialysate conductivity reading is 13.8 mS/cm.
The prescribed conductivity is 14.0 mS/cm. What is the most appropriate initial action?
A. Proceed with the treatment; the difference is within acceptable range
B. Recalibrate the conductivity sensor immediately
C. Adjust the acid concentrate proportioning to achieve 14.0 mS/cm
D. Stop the priming process and notify the biomedical technician
,Correct Answer: A
Rationale: A conductivity reading of 13.8 mS/cm when the prescribed value is 14.0 mS/cm is within
the acceptable variance range (typically ±0.2 mS/cm) for most dialysis machines. DaVita protocols
allow for minor conductivity variations that do not significantly affect sodium delivery or patient
safety. Recalibration or major adjustments are not indicated for such a small deviation. However, if
the variance exceeds ±0.2 mS/cm or persists, further investigation would be warranted.
------------------------------
Question 3
During a hemodialysis treatment, the venous pressure alarm sounds at 220 mmHg. The patient's
usual venous pressure is 120-140 mmHg. The nurse observes that the venous chamber is partially
filled with air. What is the priority nursing action?
A. Increase the heparin infusion rate to prevent clotting
B. Lower the blood pump speed to reduce pressure
C. Check for kinks in the venous bloodline and ensure the air detector is functioning
D. Clamp the arterial line and return the blood immediately
Correct Answer: C
Rationale: A sudden increase in venous pressure with air in the venous chamber suggests either a
kink or obstruction in the venous bloodline, or an air leak in the system. The priority is to identify and
correct the cause of the pressure increase while ensuring patient safety. Checking for kinks and
verifying air detector function addresses both potential causes. Increasing heparin would not
address the mechanical issue. Lowering blood pump speed is a secondary consideration. Clamping
the arterial line and returning blood is only indicated for severe air embolism or when the patient is in
immediate danger.
------------------------------
Question 4
A patient on hemodialysis has a prescribed dry weight of 72.5 kg. At the start of treatment, the
patient weighs 75.0 kg. The prescribed treatment time is 4 hours. What is the maximum
ultrafiltration rate (UFR) that the nurse should not exceed according to DaVita's patient safety
guidelines?
A. 8 mL/kg/hr
B. 10 mL/kg/hr
C. 13 mL/kg/hr
, D. 15 mL/kg/hr
Correct Answer: C
Rationale: The interdialytic weight gain is 2.5 kg (75.0 kg - 72.5 kg = 2.5 kg). The total ultrafiltration
volume needed is 2500 mL. The patient's dry weight is 72.5 kg. The ultrafiltration rate is calculated
as: 2500 mL ÷ 4 hours ÷ 72.5 kg = 8.6 mL/kg/hr. However, the question asks for the maximum UFR
that should not be exceeded according to DaVita safety guidelines. DaVita protocols recommend
that ultrafiltration rates should not exceed 13 mL/kg/hr to minimize intradialytic hypotension,
cramping, and other complications. While the calculated rate for this patient is 8.6 mL/kg/hr, the
safety ceiling is 13 mL/kg/hr.
------------------------------
Question 5
A DaVita RN is performing a pre-treatment assessment and notes that the patient's dialyzer is
labeled with a KoA of 800 mL/min. The patient's blood flow rate is 350 mL/min, and the dialysate
flow rate is 500 mL/min. What factor primarily determines the urea clearance in this scenario?
A. The dialyzer membrane surface area
B. The blood flow rate (Qb)
C. The dialysate flow rate (Qd)
D. The KoA value of the dialyzer
Correct Answer: B
Rationale: When the blood flow rate (Qb) is significantly lower than the dialyzer's mass transfer area
coefficient (KoA), the blood flow rate becomes the rate-limiting factor for urea clearance. In this
scenario, Qb is 350 mL/min while KoA is 800 mL/min. Since Qb is less than half of KoA, increasing
Qb would have a greater impact on clearance than increasing Qd or changing the dialyzer. The
dialyzer membrane surface area and KoA determine the maximum theoretical clearance, but the
actual clearance is primarily limited by the blood flow rate in this configuration.
------------------------------
Question 6
During dialysis, a patient develops severe itching and hives within 15 minutes of treatment initiation.
The patient is using a polysulfone membrane dialyzer for the first time. What type of reaction is most
likely occurring?
A. Type A dialyzer reaction (anaphylactic-type)
B. Type B dialyzer reaction (non-specific, complement-mediated)
EXAM TITLE:DaVita
RN Final Exam Questions | 100% Correct Answers
with Detailed Rationales (2026/2027 Edition)
DaVita Registered Nurse Clinical Competency Examination
==============================
SECTION 1: Hemodialysis Principles and Procedures
Question 1
A nurse is preparing to initiate a hemodialysis treatment for a patient using a Fresenius 2008K
machine. According to DaVita protocol, what is the minimum recommended blood flow rate (Qb) for
an adult patient with a functioning arteriovenous (AV) fistula?
A. 150 mL/min
B. 200 mL/min
C. 250 mL/min
D. 300 mL/min
Correct Answer: C
Rationale: DaVita clinical protocols recommend a minimum blood flow rate of 250 mL/min for adult
patients with a functioning AV fistula to achieve adequate dialysis clearance (Kt/V). Blood flow rates
below 250 mL/min may result in suboptimal urea clearance and reduced dialysis adequacy. Rates of
150-200 mL/min are typically reserved for patients with central venous catheters or those with
hemodynamic instability, while 300 mL/min is often the target for optimal clearance in patients with
adequate vascular access.
------------------------------
Question 2
A DaVita RN is priming a dialyzer and notices that the dialysate conductivity reading is 13.8 mS/cm.
The prescribed conductivity is 14.0 mS/cm. What is the most appropriate initial action?
A. Proceed with the treatment; the difference is within acceptable range
B. Recalibrate the conductivity sensor immediately
C. Adjust the acid concentrate proportioning to achieve 14.0 mS/cm
D. Stop the priming process and notify the biomedical technician
,Correct Answer: A
Rationale: A conductivity reading of 13.8 mS/cm when the prescribed value is 14.0 mS/cm is within
the acceptable variance range (typically ±0.2 mS/cm) for most dialysis machines. DaVita protocols
allow for minor conductivity variations that do not significantly affect sodium delivery or patient
safety. Recalibration or major adjustments are not indicated for such a small deviation. However, if
the variance exceeds ±0.2 mS/cm or persists, further investigation would be warranted.
------------------------------
Question 3
During a hemodialysis treatment, the venous pressure alarm sounds at 220 mmHg. The patient's
usual venous pressure is 120-140 mmHg. The nurse observes that the venous chamber is partially
filled with air. What is the priority nursing action?
A. Increase the heparin infusion rate to prevent clotting
B. Lower the blood pump speed to reduce pressure
C. Check for kinks in the venous bloodline and ensure the air detector is functioning
D. Clamp the arterial line and return the blood immediately
Correct Answer: C
Rationale: A sudden increase in venous pressure with air in the venous chamber suggests either a
kink or obstruction in the venous bloodline, or an air leak in the system. The priority is to identify and
correct the cause of the pressure increase while ensuring patient safety. Checking for kinks and
verifying air detector function addresses both potential causes. Increasing heparin would not
address the mechanical issue. Lowering blood pump speed is a secondary consideration. Clamping
the arterial line and returning blood is only indicated for severe air embolism or when the patient is in
immediate danger.
------------------------------
Question 4
A patient on hemodialysis has a prescribed dry weight of 72.5 kg. At the start of treatment, the
patient weighs 75.0 kg. The prescribed treatment time is 4 hours. What is the maximum
ultrafiltration rate (UFR) that the nurse should not exceed according to DaVita's patient safety
guidelines?
A. 8 mL/kg/hr
B. 10 mL/kg/hr
C. 13 mL/kg/hr
, D. 15 mL/kg/hr
Correct Answer: C
Rationale: The interdialytic weight gain is 2.5 kg (75.0 kg - 72.5 kg = 2.5 kg). The total ultrafiltration
volume needed is 2500 mL. The patient's dry weight is 72.5 kg. The ultrafiltration rate is calculated
as: 2500 mL ÷ 4 hours ÷ 72.5 kg = 8.6 mL/kg/hr. However, the question asks for the maximum UFR
that should not be exceeded according to DaVita safety guidelines. DaVita protocols recommend
that ultrafiltration rates should not exceed 13 mL/kg/hr to minimize intradialytic hypotension,
cramping, and other complications. While the calculated rate for this patient is 8.6 mL/kg/hr, the
safety ceiling is 13 mL/kg/hr.
------------------------------
Question 5
A DaVita RN is performing a pre-treatment assessment and notes that the patient's dialyzer is
labeled with a KoA of 800 mL/min. The patient's blood flow rate is 350 mL/min, and the dialysate
flow rate is 500 mL/min. What factor primarily determines the urea clearance in this scenario?
A. The dialyzer membrane surface area
B. The blood flow rate (Qb)
C. The dialysate flow rate (Qd)
D. The KoA value of the dialyzer
Correct Answer: B
Rationale: When the blood flow rate (Qb) is significantly lower than the dialyzer's mass transfer area
coefficient (KoA), the blood flow rate becomes the rate-limiting factor for urea clearance. In this
scenario, Qb is 350 mL/min while KoA is 800 mL/min. Since Qb is less than half of KoA, increasing
Qb would have a greater impact on clearance than increasing Qd or changing the dialyzer. The
dialyzer membrane surface area and KoA determine the maximum theoretical clearance, but the
actual clearance is primarily limited by the blood flow rate in this configuration.
------------------------------
Question 6
During dialysis, a patient develops severe itching and hives within 15 minutes of treatment initiation.
The patient is using a polysulfone membrane dialyzer for the first time. What type of reaction is most
likely occurring?
A. Type A dialyzer reaction (anaphylactic-type)
B. Type B dialyzer reaction (non-specific, complement-mediated)
