CCHT Exam Questions & Answers
How is dialysis delivered?
Correct Answer:
The Hemodialysis Machine.
How much saline should be infused through the dialyzer and extracorporeal circuit?
Correct Answer:
300 mLs to prime the dialyzer and circuit with normal saline.
How much saline is used for a "fresh fill"?
Correct Answer:
50 mLs NS through the arterial and 250 mLs NS through the venous.
When should the Hanson connectors be connected to the dialyzer?
Correct Answer:
NS has been primed, both lines connected, test passed, and conductivity and pH checked.
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What position should the dialyzer be in during circulation?
Correct Answer:
Venous end up
How long can a dialyzer recirculate with saline before it is considered unsafe to use?
Correct Answer:
- hours
What volume should be used for fresh fill?
Correct Answer:
50 mL of saline from arterial and 250 mL of saline from venous
What 3 processes occur in the dialyzer simultaneously?
Correct Answer:
Diffusion, osmosis, and ultrafiltration
What is ultrafiltration during dialysis?
Correct Answer:
More than 1 type of pressure to remove fluid from the blood, positive and negative pressure combined.
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What direction does blood flow through the dialyzer as compared to dialysate flow?
Correct Answer:
Blood and dialysate flow in a countercurrent flow.
What is TMP?
Correct Answer:
Transmembrane pressure, the pressure difference across the dialyzer membrane.
How can you tell if a dialyzer is clotting?
Correct Answer:
Rising TMP, rising venous pressure, dark blood in dialyzer, and air detector alarms.
What is heparin?
Correct Answer:
Anticoagulant that prevents clotting
After heparin is given, how long must you wait before initiating treatment?
Correct Answer:
3-5 minutes
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When do you not give a patient heparin?
Correct Answer:
1) Allergic to it 2) Actively bleeding 3) Scheduled for surgery/Post surgery
For how long can a patient’s blood be re-circulated during treatment interruption?
Correct Answer:
15 minutes, longer than 15 minutes’ blood needs to be given back
- kg =
Correct Answer:
2.2 lbs
What does "estimated dry weight" mean?
Correct Answer:
Estimated weight of the patient without any s/s of edema
What is adequacy of dialysis?
Correct Answer:
Measurement of how well we are cleaning waste from the patients blood
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