Dialysis - Fresenius Exam Questions
and Answers 100% Pass
Dialysate is kept in the temperature range of... ✔✔34.5-36.5°C
Too warm dialysate can... ✔✔Cause the patient's RBC's to burst (hemolysis), as well as, cause
hyperthermia.
Too cold dialysate can.. ✔✔Cause the patient's to feel cold and less diffusion of dialysate will
occur. However, slightly cool dialysate can help prevent deadly hypotension and organ stunning
due to the constriction of blood vessels.
Conductivity definition ✔✔How well fluid conducts an electrical charge (should be isotonic).
Theoretical conductivity (TCD) ✔✔Based on the prescription. Should be close to the actual (+/-
0.5)
Low conductivity can cause... ✔✔Is diverted to drain too much H2O. Can cause RBC rupture
which increases K+, and pt can have s/s of hypoxia due to hemolysis.
,High conductivity can cause... ✔✔Hypertonic solution where there is too little H2O...H2O is
leaving the cell to dilute sodium content outside the cell (crenation).
pH definition ✔✔Hydrogen ion concentration of a solution.
• Failed kidney's don't secrete bicarb and can't get rid of acid (CO2) so the pt is acidotic. Which
is why bicarb is increased in the dialysate solution.
pH of dialysate is... ✔✔6.9-7.6
Use of a diasafe filter allows the production of? ✔✔ultrapure dialysate
Air is removed from the extracorporeal circuit before initiating treatment because it may cause
____ when trapped in the dialyzer. ✔✔Clotting
The most likely cause of contamination of the extracorporaeal circuit are ____ in the prime
bucket ____ end caps. ✔✔bloodlines, open
, A low-level arterial drip chamber can result in ____ entering the system causing an air embolism
or clotting. ✔✔air
When blood escapes from the dialyzer blood compartment into the dialysate fluid compartment
this is known as ✔✔blood leak (DON'T RETURN THE BLOOD)
When should alarm and Pressure Holding Tests (PHT) be performed on dialysis machines?
✔✔Before every treatment.
In addition to safety checks, what tests must you perform to ensure a safe patient environment?
✔✔Meter conductivity and pH.
Why do you compare machine conductivity setting to the meter conductivity results? ✔✔To
ensure machine display is accurate.
The Transmembrane pressure (TMP) measures the ____ difference across the dialyzer
membrane. ✔✔pressure
and Answers 100% Pass
Dialysate is kept in the temperature range of... ✔✔34.5-36.5°C
Too warm dialysate can... ✔✔Cause the patient's RBC's to burst (hemolysis), as well as, cause
hyperthermia.
Too cold dialysate can.. ✔✔Cause the patient's to feel cold and less diffusion of dialysate will
occur. However, slightly cool dialysate can help prevent deadly hypotension and organ stunning
due to the constriction of blood vessels.
Conductivity definition ✔✔How well fluid conducts an electrical charge (should be isotonic).
Theoretical conductivity (TCD) ✔✔Based on the prescription. Should be close to the actual (+/-
0.5)
Low conductivity can cause... ✔✔Is diverted to drain too much H2O. Can cause RBC rupture
which increases K+, and pt can have s/s of hypoxia due to hemolysis.
,High conductivity can cause... ✔✔Hypertonic solution where there is too little H2O...H2O is
leaving the cell to dilute sodium content outside the cell (crenation).
pH definition ✔✔Hydrogen ion concentration of a solution.
• Failed kidney's don't secrete bicarb and can't get rid of acid (CO2) so the pt is acidotic. Which
is why bicarb is increased in the dialysate solution.
pH of dialysate is... ✔✔6.9-7.6
Use of a diasafe filter allows the production of? ✔✔ultrapure dialysate
Air is removed from the extracorporeal circuit before initiating treatment because it may cause
____ when trapped in the dialyzer. ✔✔Clotting
The most likely cause of contamination of the extracorporaeal circuit are ____ in the prime
bucket ____ end caps. ✔✔bloodlines, open
, A low-level arterial drip chamber can result in ____ entering the system causing an air embolism
or clotting. ✔✔air
When blood escapes from the dialyzer blood compartment into the dialysate fluid compartment
this is known as ✔✔blood leak (DON'T RETURN THE BLOOD)
When should alarm and Pressure Holding Tests (PHT) be performed on dialysis machines?
✔✔Before every treatment.
In addition to safety checks, what tests must you perform to ensure a safe patient environment?
✔✔Meter conductivity and pH.
Why do you compare machine conductivity setting to the meter conductivity results? ✔✔To
ensure machine display is accurate.
The Transmembrane pressure (TMP) measures the ____ difference across the dialyzer
membrane. ✔✔pressure
