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Physical basis of hemodialysis. Hemodialyzer - Medical Physics - MCQs

Hussain Basheer 12 preguntas

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Preguntas del test (12)

  1. 1Hemodialysis is a method for:
    1. ADetermination of serum proteins by blood dialysis
    2. BRemoving toxins from patient’s blood
    3. Cinvestigating brain hemodynamics
  2. 2Does speed of dialysis depend on the conductance of the membrane?
    1. AYes, high conductance relates to faster dialysis
    2. BYes, high conductance relates to slower dialysis
    3. CThere is no correlation between membrane conductance and the rate of dialysis
  3. 3What is the purpose of the air micro-bubble detector in the hemodialysis machine?
    1. ATo check the O2 level in the blood
    2. BTo check the levels of CO2 in the blood
    3. CTo prevent gas (air) embolism
  4. 4Gas embolism of blood vessels (blockage) can be explained by the:
    1. AReynolds number Re
    2. BBlood viscosity η
    3. CLaplace pressure Δp
  5. 5Toxin 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.Imagen de la pregunta 5
    1. A5h
    2. B2.5 min
    3. C2.5h
  6. 6During 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:
    1. AThere are more electrolytes
    2. BThere are air bubbles
    3. CThere are less electrolytes
  7. 7What type of membrane is commonly used for hemodialysis?
    1. AArtificial semipermeable membrane
    2. BOrganic semipermeable membrane
    3. CImpermeable membrane
  8. 8In the dialysis column, blood and dialysate travel in:
    1. AThe same direction
    2. BOpposite directions
    3. CBlood travels while the dialysate stays still
  9. 9During hemodialysis, why is it important to keep blood pressure higher than dialysate pressure?
    1. ATo force toxic substances from the blood into the dialysate
    2. BTo prevent backflow of substances from dialysate solution into the blood
    3. CTo facilitate ultrafiltration (remove excess water out of the blood stream)
  10. 10During hemodialysis, is it necessary for the dialysate solution to be hypertonic?
    1. AYes, because this way ions will flow back into the blood
    2. BNot necessary, because it could can have negative effects on the dialysis
    3. CIt is necessary, in order not to slow down the dialysis

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Descripción
Medical Physics Test sobre Physical basis of hemodialysis. Hemodialyzer - Medical Physics - MCQs, creado por Hussain Basheer el 23/11/2018.
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English
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