,DaVita Practice Test | Comprehensive Study Guide | Questions and
detailed Answers + Expert Rationales | 2026/27 Updated | 100% Pass
Guarantee
1. AAMI chemical analysis of water used for hemodialysis is tested:
A. Monthly
B. Quarterly
C. Annually (✔ Correct Answer)
D. Weekly
Expert Rationale: AAMI (Association for the Advancement of Medical
Instrumentation) requires a full chemical analysis of water used for hemodialysis to
be performed annually. This comprehensive testing checks for heavy metals,
chemicals, and other contaminants to ensure water quality and patient safety.
2. A 58-year-old patient who is blind comes to the treatment accompanied by
his wife. Which of these approaches should the dialysis technician use when
interacting with the patient?
A. Speak loudly and slowly
B. Only speak to the wife
C. Describe the activities in the immediate environment (✔ Correct Answer)
D. Avoid talking to the patient
Expert Rationale: When interacting with a blind patient, the technician should
describe the environment and activities to help the patient maintain orientation and
independence. This respects the patient's dignity and ensures they understand what
is happening around them.
3. A dialysis tech observes a drop of blood on the surface of a patient's
hemodialysis machine. Which of these actions should the tech take?
A. Wait until the treatment is over to clean it
B. Wipe it with a dry cloth
,C. Clean the machine surface immediately (✔ Correct Answer)
D. Notify the nurse first
Expert Rationale: Blood spills must be cleaned immediately to prevent cross-
contamination and infection transmission. Prompt cleaning reduces the risk of
exposure to bloodborne pathogens for both patients and staff.
4. A dialysis tech observes all of the below on the treatment floor. Which one
poses an environmental risk?
A. A patient's personal belongings on the floor
B. A wet mop bucket in the corner
C. About 30 mL of fluid on the floor (✔ Correct Answer)
D. A chair slightly out of place
Expert Rationale: Fluid on the floor creates a slip and fall hazard, posing an
environmental safety risk to patients, staff, and visitors. All spills must be cleaned up
immediately to prevent injuries.
5. A female dialysis technician has been caring for a male patient for several
months. The patient tells the dialysis technician that he is lonely and depressed.
He asks the dialysis technician to go out to dinner with him. In addition to
politely declining the patient's invitation, which of these actions, if any, should
the dialysis technician take?
A. Report the patient to the facility administrator
B. Ignore the comment and continue care
C. Refer the patient to the social worker (✔ Correct Answer)
D. Accept the invitation to support the patient
Expert Rationale: The technician should maintain professional boundaries and
decline the invitation. Referring the patient to the social worker is appropriate
because the social worker can address the patient's underlying psychosocial needs
(loneliness, depression) through counseling and community resources.
6. A fistula connects:
A. A vein to a vein
, B. An artery to a vein (✔ Correct Answer)
C. An artery to an artery
D. A vein to a graft
Expert Rationale: An arteriovenous (AV) fistula is a surgical connection of an artery
directly to a vein. This creates high-pressure, high-flow vascular access suitable for
hemodialysis.
7. A marker used to determine the middle molecule clearance of a dialyzer is:
A. Urea
B. Vitamin B12 (✔ Correct Answer)
C. Creatinine
D. Glucose
Expert Rationale: Vitamin B12 (molecular weight ~1,355 Daltons) is used as a
marker for middle molecule clearance. Urea (60 D) and creatinine (113 D) are small
molecule markers; middle molecules (500-5,000 D) require different assessment.
8. A mixed-bed DI (Deionization) tank contains:
A. Only cations
B. Only anions
C. Cations and anions (✔ Correct Answer)
D. Only organic compounds
Expert Rationale: A mixed-bed deionization tank contains both cation and anion
exchange resins mixed together. This allows for removal of both positively and
negatively charged ions from water in a single tank, producing high-purity water.
9. A nephron is made up of:
A. A glomerulus only
B. A tubule system only
C. A glomerulus and a tubule system (✔ Correct Answer)
D. A collecting duct only
detailed Answers + Expert Rationales | 2026/27 Updated | 100% Pass
Guarantee
1. AAMI chemical analysis of water used for hemodialysis is tested:
A. Monthly
B. Quarterly
C. Annually (✔ Correct Answer)
D. Weekly
Expert Rationale: AAMI (Association for the Advancement of Medical
Instrumentation) requires a full chemical analysis of water used for hemodialysis to
be performed annually. This comprehensive testing checks for heavy metals,
chemicals, and other contaminants to ensure water quality and patient safety.
2. A 58-year-old patient who is blind comes to the treatment accompanied by
his wife. Which of these approaches should the dialysis technician use when
interacting with the patient?
A. Speak loudly and slowly
B. Only speak to the wife
C. Describe the activities in the immediate environment (✔ Correct Answer)
D. Avoid talking to the patient
Expert Rationale: When interacting with a blind patient, the technician should
describe the environment and activities to help the patient maintain orientation and
independence. This respects the patient's dignity and ensures they understand what
is happening around them.
3. A dialysis tech observes a drop of blood on the surface of a patient's
hemodialysis machine. Which of these actions should the tech take?
A. Wait until the treatment is over to clean it
B. Wipe it with a dry cloth
,C. Clean the machine surface immediately (✔ Correct Answer)
D. Notify the nurse first
Expert Rationale: Blood spills must be cleaned immediately to prevent cross-
contamination and infection transmission. Prompt cleaning reduces the risk of
exposure to bloodborne pathogens for both patients and staff.
4. A dialysis tech observes all of the below on the treatment floor. Which one
poses an environmental risk?
A. A patient's personal belongings on the floor
B. A wet mop bucket in the corner
C. About 30 mL of fluid on the floor (✔ Correct Answer)
D. A chair slightly out of place
Expert Rationale: Fluid on the floor creates a slip and fall hazard, posing an
environmental safety risk to patients, staff, and visitors. All spills must be cleaned up
immediately to prevent injuries.
5. A female dialysis technician has been caring for a male patient for several
months. The patient tells the dialysis technician that he is lonely and depressed.
He asks the dialysis technician to go out to dinner with him. In addition to
politely declining the patient's invitation, which of these actions, if any, should
the dialysis technician take?
A. Report the patient to the facility administrator
B. Ignore the comment and continue care
C. Refer the patient to the social worker (✔ Correct Answer)
D. Accept the invitation to support the patient
Expert Rationale: The technician should maintain professional boundaries and
decline the invitation. Referring the patient to the social worker is appropriate
because the social worker can address the patient's underlying psychosocial needs
(loneliness, depression) through counseling and community resources.
6. A fistula connects:
A. A vein to a vein
, B. An artery to a vein (✔ Correct Answer)
C. An artery to an artery
D. A vein to a graft
Expert Rationale: An arteriovenous (AV) fistula is a surgical connection of an artery
directly to a vein. This creates high-pressure, high-flow vascular access suitable for
hemodialysis.
7. A marker used to determine the middle molecule clearance of a dialyzer is:
A. Urea
B. Vitamin B12 (✔ Correct Answer)
C. Creatinine
D. Glucose
Expert Rationale: Vitamin B12 (molecular weight ~1,355 Daltons) is used as a
marker for middle molecule clearance. Urea (60 D) and creatinine (113 D) are small
molecule markers; middle molecules (500-5,000 D) require different assessment.
8. A mixed-bed DI (Deionization) tank contains:
A. Only cations
B. Only anions
C. Cations and anions (✔ Correct Answer)
D. Only organic compounds
Expert Rationale: A mixed-bed deionization tank contains both cation and anion
exchange resins mixed together. This allows for removal of both positively and
negatively charged ions from water in a single tank, producing high-purity water.
9. A nephron is made up of:
A. A glomerulus only
B. A tubule system only
C. A glomerulus and a tubule system (✔ Correct Answer)
D. A collecting duct only
