CCHT HEMODIALYSIS TECHNICIAN EXAM – QUESTIONS AND
ANSWERS | VERIFIED AND WELL DETAILED ANSWERS PLUS
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1. A newly hired hemodialysis technician is preparing to set up an extracorporeal circuit.
Which of the following components is primarily responsible for removing metabolic waste
products and excess fluid from the patient's blood through a semipermeable membrane?
A. Blood pump
B. Dialyzer
C. Air detector
D. Heparin infusion pump
ANSWER: B. Dialyzer
The dialyzer serves as the artificial kidney, utilizing a semipermeable membrane to facilitate
diffusion, ultrafiltration, and convection to clear toxins and fluid.
2. A patient undergoing hemodialysis suddenly complains of dizziness, lightheadedness,
and yawning. The technician notes the blood pressure has dropped from 130/80 mmHg to
90/50 mmHg. What is the most immediate appropriate action?
A. Increase the blood pump speed to maximum capacity
B. Administer a 50% dextrose intravenous bolus
C. Place the patient in a Trendelenburg position and temporarily decrease or stop ultrafiltration
D. Disconnect the patient immediately without returning the blood
ANSWER: C. Place the patient in a Trendelenburg position and temporarily decrease or
stop ultrafiltration
Intradialytic hypotension is commonly managed by reducing fluid removal rates and
positioning the patient to enhance venous return to the heart.
,3. During pre-treatment evaluation, a patient with a left arm arteriovenous (AV) fistula has
a thrill palpated over the anastomosis site, but a high-pitched, whistling bruit is
auscultated. What does this physical finding typically indicate?
A. Normal, healthy vascular access maturation
B. Suspected stenosis or narrowing within the access outflow vein
C. Complete thrombosis and total occlusion of the fistula
D. Development of a distal arterial aneurysm
ANSWER: B. Suspected stenosis or narrowing within the access outflow vein
A high-pitched, musical, or whistling systolic bruit often signifies a high-velocity jet stream
caused by a focal stenosis or outflow restriction.
4. Which of the following water treatment components is primarily responsible for
removing suspended particles, silt, and large organic molecules from the municipal feed
water supply?
A. Reverse osmosis membrane
B. Deionization tanks
C. Multimedia depth filter
D. Ultraviolet sterilizer
ANSWER: C. Multimedia depth filter
Multimedia depth filters utilize layers of graded media like sand and anthracite to trap
suspended solids and turbidity before downstream purification steps.
5. A patient's dialysate conductivity meter alarms, indicating that the conductivity is
outside the acceptable safety range. According to standard operating procedures, what
action must the technician take first?
A. Bypass the dialyzer and verify conductivity with an independent meter
B. Immediately infuse 500 mL of normal saline into the patient
C. Increase the dialysate temperature to compensate
D. Ignore the alarm if the patient feels comfortable
,ANSWER: A. Bypass the dialyzer and verify conductivity with an independent meter
Safety protocols require isolating the patient from improper dialysate composition immediately
by placing the machine in bypass while checking values with an independent secondary meter.
6. Which bloodborne pathogen poses the highest risk of occupational seroconversion for
healthcare personnel following a needlestick injury involving a contaminated dialysis
needle?
A. Human Immunodeficiency Virus (HIV)
B. Hepatitis B Virus (HBV)
C. Hepatitis C Virus (HCV)
D. Cytomegalovirus (CMV)
ANSWER: B. Hepatitis B Virus (HBV)
HBV has a significantly higher infectivity and viral transmission rate following a
percutaneous exposure compared to HIV or HCV.
7. A patient complains of sudden, severe cramping in both calves 3 hours into a 4-hour
hemodialysis treatment. The patient has achieved 90% of their prescribed fluid removal
goal. Which factor most frequently contributes to this complication?
A. Rapid fluid removal causing intravascular volume depletion and muscle ischemia
B. Excessive sodium loading from the dialysate
C. High dialysate flow rates exceeding 800 mL/min
D. Inadequate heparinization of the extracorporeal circuit
ANSWER: A. Rapid fluid removal causing intravascular volume depletion and muscle
ischemia
Muscle cramps frequently occur when ultrafiltration rate outpaces plasma refill capacity,
leading to tissue hypoperfusion and electrolyte shifts.
8. When performing a pre-pump arterial pressure check on a hemodialysis machine, the
technician notices the pressure reading is excessively negative. What condition in the
extracorporeal circuit typically causes this finding?
A. A kink or obstruction in the blood tubing line upstream from the pressure pod
, B. A venous needle dislodgement outside the vascular access
C. Excessive infusion of sterile normal saline
D. A ruptured hollow fiber within the dialyzer
ANSWER: A. A kink or obstruction in the blood tubing line upstream from the pressure
pod
An obstruction between the vascular access and the arterial pressure monitor creates
increased resistance, pulling a more negative vacuum pressure.
9. What is the primary purpose of adding sodium bicarbonate to the acid concentrate to
create final dialysate fluid?
A. To increase blood clotting time within the dialyzer
B. To correct metabolic acidosis by buffering excess hydrogen ions in the patient's blood
C. To inhibit bacterial growth inside the water distribution loop
D. To raise the systemic blood pressure of hypotensive patients
ANSWER: B. To correct metabolic acidosis by buffering excess hydrogen ions in the
patient's blood
Renal failure results in chronic metabolic acidosis; bicarbonate is delivered across the dialyzer
membrane to buffer patient acid load.
10. A technician is priming an extracorporeal blood circuit with normal saline. Why is it
standard practice to prime the dialyzer and blood lines prior to initiating treatment?
A. To warm the blood lines to body temperature
B. To remove residual air and sterilizing manufacturing residues from the circuit
C. To infuse electrolytes directly into the patient before connection
D. To test the mechanical strength of the blood pump rollers
ANSWER: B. To remove residual air and sterilizing manufacturing residues from the
circuit
Priming thoroughly flushes out manufacturing sterilants and eliminates trapped air to prevent
lethal air embolism.
ANSWERS | VERIFIED AND WELL DETAILED ANSWERS PLUS
RATIONALES | GUARANTEED PASS | LATEST EXAM UPDATE |
EXAM PREP | STUDY GUIDE | PRACTICE TEST| DOWNLOAD
INSTANT PDF
1. A newly hired hemodialysis technician is preparing to set up an extracorporeal circuit.
Which of the following components is primarily responsible for removing metabolic waste
products and excess fluid from the patient's blood through a semipermeable membrane?
A. Blood pump
B. Dialyzer
C. Air detector
D. Heparin infusion pump
ANSWER: B. Dialyzer
The dialyzer serves as the artificial kidney, utilizing a semipermeable membrane to facilitate
diffusion, ultrafiltration, and convection to clear toxins and fluid.
2. A patient undergoing hemodialysis suddenly complains of dizziness, lightheadedness,
and yawning. The technician notes the blood pressure has dropped from 130/80 mmHg to
90/50 mmHg. What is the most immediate appropriate action?
A. Increase the blood pump speed to maximum capacity
B. Administer a 50% dextrose intravenous bolus
C. Place the patient in a Trendelenburg position and temporarily decrease or stop ultrafiltration
D. Disconnect the patient immediately without returning the blood
ANSWER: C. Place the patient in a Trendelenburg position and temporarily decrease or
stop ultrafiltration
Intradialytic hypotension is commonly managed by reducing fluid removal rates and
positioning the patient to enhance venous return to the heart.
,3. During pre-treatment evaluation, a patient with a left arm arteriovenous (AV) fistula has
a thrill palpated over the anastomosis site, but a high-pitched, whistling bruit is
auscultated. What does this physical finding typically indicate?
A. Normal, healthy vascular access maturation
B. Suspected stenosis or narrowing within the access outflow vein
C. Complete thrombosis and total occlusion of the fistula
D. Development of a distal arterial aneurysm
ANSWER: B. Suspected stenosis or narrowing within the access outflow vein
A high-pitched, musical, or whistling systolic bruit often signifies a high-velocity jet stream
caused by a focal stenosis or outflow restriction.
4. Which of the following water treatment components is primarily responsible for
removing suspended particles, silt, and large organic molecules from the municipal feed
water supply?
A. Reverse osmosis membrane
B. Deionization tanks
C. Multimedia depth filter
D. Ultraviolet sterilizer
ANSWER: C. Multimedia depth filter
Multimedia depth filters utilize layers of graded media like sand and anthracite to trap
suspended solids and turbidity before downstream purification steps.
5. A patient's dialysate conductivity meter alarms, indicating that the conductivity is
outside the acceptable safety range. According to standard operating procedures, what
action must the technician take first?
A. Bypass the dialyzer and verify conductivity with an independent meter
B. Immediately infuse 500 mL of normal saline into the patient
C. Increase the dialysate temperature to compensate
D. Ignore the alarm if the patient feels comfortable
,ANSWER: A. Bypass the dialyzer and verify conductivity with an independent meter
Safety protocols require isolating the patient from improper dialysate composition immediately
by placing the machine in bypass while checking values with an independent secondary meter.
6. Which bloodborne pathogen poses the highest risk of occupational seroconversion for
healthcare personnel following a needlestick injury involving a contaminated dialysis
needle?
A. Human Immunodeficiency Virus (HIV)
B. Hepatitis B Virus (HBV)
C. Hepatitis C Virus (HCV)
D. Cytomegalovirus (CMV)
ANSWER: B. Hepatitis B Virus (HBV)
HBV has a significantly higher infectivity and viral transmission rate following a
percutaneous exposure compared to HIV or HCV.
7. A patient complains of sudden, severe cramping in both calves 3 hours into a 4-hour
hemodialysis treatment. The patient has achieved 90% of their prescribed fluid removal
goal. Which factor most frequently contributes to this complication?
A. Rapid fluid removal causing intravascular volume depletion and muscle ischemia
B. Excessive sodium loading from the dialysate
C. High dialysate flow rates exceeding 800 mL/min
D. Inadequate heparinization of the extracorporeal circuit
ANSWER: A. Rapid fluid removal causing intravascular volume depletion and muscle
ischemia
Muscle cramps frequently occur when ultrafiltration rate outpaces plasma refill capacity,
leading to tissue hypoperfusion and electrolyte shifts.
8. When performing a pre-pump arterial pressure check on a hemodialysis machine, the
technician notices the pressure reading is excessively negative. What condition in the
extracorporeal circuit typically causes this finding?
A. A kink or obstruction in the blood tubing line upstream from the pressure pod
, B. A venous needle dislodgement outside the vascular access
C. Excessive infusion of sterile normal saline
D. A ruptured hollow fiber within the dialyzer
ANSWER: A. A kink or obstruction in the blood tubing line upstream from the pressure
pod
An obstruction between the vascular access and the arterial pressure monitor creates
increased resistance, pulling a more negative vacuum pressure.
9. What is the primary purpose of adding sodium bicarbonate to the acid concentrate to
create final dialysate fluid?
A. To increase blood clotting time within the dialyzer
B. To correct metabolic acidosis by buffering excess hydrogen ions in the patient's blood
C. To inhibit bacterial growth inside the water distribution loop
D. To raise the systemic blood pressure of hypotensive patients
ANSWER: B. To correct metabolic acidosis by buffering excess hydrogen ions in the
patient's blood
Renal failure results in chronic metabolic acidosis; bicarbonate is delivered across the dialyzer
membrane to buffer patient acid load.
10. A technician is priming an extracorporeal blood circuit with normal saline. Why is it
standard practice to prime the dialyzer and blood lines prior to initiating treatment?
A. To warm the blood lines to body temperature
B. To remove residual air and sterilizing manufacturing residues from the circuit
C. To infuse electrolytes directly into the patient before connection
D. To test the mechanical strength of the blood pump rollers
ANSWER: B. To remove residual air and sterilizing manufacturing residues from the
circuit
Priming thoroughly flushes out manufacturing sterilants and eliminates trapped air to prevent
lethal air embolism.
