16128371
Description
Quiz by Hussain Basheer, updated more than 1 year ago
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Created by Hussain Basheer
over 5 years ago
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Question 1
Question
Hemodialysis is a method for:
Answer
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Determination of serum proteins by blood dialysis
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Removing toxins from patient’s blood
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investigating brain hemodynamics
Question 2
Question
Does speed of dialysis depend on the conductance of the membrane?
Answer
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Yes, high conductance relates to faster dialysis
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Yes, high conductance relates to slower dialysis
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There is no correlation between membrane conductance and the rate of dialysis
Question 3
Question
What is the purpose of the air micro-bubble detector in the hemodialysis machine?
Answer
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To check the O2 level in the blood
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To check the levels of CO2 in the blood
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To prevent gas (air) embolism
Question 4
Question
Gas embolism of blood vessels (blockage) can be explained by the:
Answer
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Reynolds number Re
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Blood viscosity η
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Laplace pressure Δp
Question 5
Question
Toxin concentrations in blood during Hemodialysis can be modeled with an exponential decay law. Using the graph below (Fig. 2), estimate the time it takes for toxin concentration to decrease from 60 to 40 percent of the original.
Image:
Image (binary/octet-stream)
Answer
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5h
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2.5 min
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2.5h
Question 6
Question
During hemodialysis, the proper concentration of electrolytes in the dialysate (dialyzing solution) is evaluated continuously by measuring the conductivity of the solution. If conductivity DECREASES, that means:
Answer
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There are more electrolytes
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There are air bubbles
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There are less electrolytes
Question 7
Question
What type of membrane is commonly used for hemodialysis?
Answer
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Artificial semipermeable membrane
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Organic semipermeable membrane
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Impermeable membrane
Question 8
Question
In the dialysis column, blood and dialysate travel in:
Answer
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The same direction
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Opposite directions
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Blood travels while the dialysate stays still
Question 9
Question
During hemodialysis, why is it important to keep blood pressure higher than dialysate pressure?
Answer
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To force toxic substances from the blood into the dialysate
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To prevent backflow of substances from dialysate solution into the blood
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To facilitate ultrafiltration (remove excess water out of the blood stream)
Question 10
Question
During hemodialysis, is it necessary for the dialysate solution to be hypertonic?
Answer
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Yes, because this way ions will flow back into the blood
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Not necessary, because it could can have negative effects on the dialysis
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It is necessary, in order not to slow down the dialysis
Question 11
Question
Osmosis is:
Answer
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Movement of solvent through a semipermeable membrane into a region with higher solute concentration
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Movement of solute through a semipermeable membrane into a region with higher solvent concentration
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Diffusion of water
Question 12
Question
Which of the following is absolutely necessary for the process of osmosis to occur?
Answer
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Water
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Semipermeable membrane
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Sodium ions
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