Werkblad Laboratoriumwaarden en elektrolyten met antwoorden

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Naam: ____________________   Datum: ____________

1.Makkelijk

A low mean corpuscular volume (MCV) means that:

  1. AThe bone marrow is making too many white cells
  2. BThe red cells are larger than normal (macrocytic)
  3. CThe red cells contain more hemoglobin than normal
  4. DThe red cells are smaller than normal (microcytic)
2.Makkelijk

Which laboratory test best reflects the body's iron stores?

  1. ASerum albumin
  2. BSerum ferritin
  3. CSerum sodium
  4. DPlatelet count
3.Makkelijk

Which laboratory test is used to monitor warfarin therapy?

  1. AD-dimer
  2. BPlatelet count
  3. CPT with INR
  4. DaPTT
4.Gemiddeld

In countries that screen all pregnant women (such as the US), a vaginal-rectal swab is taken at about 36–37 weeks. Which organism is it screening for?

  1. ACandida albicans
  2. BHepatitis B virus
  3. CGroup B Streptococcus
  4. DStaphylococcus aureus
5.Gemiddeld

An older adult with chronic kidney disease takes glyburide (glibenclamide, a sulfonylurea) and has repeated low glucose readings. Why is this a concern?

  1. AThe drug causes high potassium that lowers the glucose
  2. BThe drug and its metabolites build up and cause long lows
  3. CThe drug makes the glucose meter read falsely low
  4. DThe drug stops working entirely when the kidneys fail
6.Gemiddeld

A patient on levothyroxine has palpitations, weight loss and a TSH of 0,05 mIU/L. What is the most likely explanation?

  1. AThe levothyroxine dose is too high
  2. BThe patient has stopped the drug
  3. CThe levothyroxine dose is too low
  4. DThe thyroid is now completely normal
7.Moeilijk

A patient with a stable INR on warfarin starts rifampin (rifampicin) for tuberculosis. Two weeks later the INR is 1,3. What is the most likely explanation?

  1. ATuberculosis causes the INR to fall
  2. BRifampin speeds up warfarin metabolism
  3. CRifampin contains a lot of vitamin K
  4. DRifampin raises the INR, so it is wrong
8.Moeilijk

A patient with chronic kidney disease stage 4 has a high phosphate, a low-normal calcium and a very high parathyroid hormone (PTH). What does this show?

  1. AVitamin D toxicity from supplements
  2. BHypoparathyroidism after neck surgery
  3. CPrimary hyperparathyroidism from a tumor
  4. DSecondary hyperparathyroidism from CKD

Antwoordenblad

  1. 1. D · The red cells are smaller than normal (microcytic)
  2. 2. B · Serum ferritin
  3. 3. C · PT with INR
  4. 4. C · Group B Streptococcus
  5. 5. B · The drug and its metabolites build up and cause long lows
  6. 6. A · The levothyroxine dose is too high
  7. 7. B · Rifampin speeds up warfarin metabolism
  8. 8. D · Secondary hyperparathyroidism from CKD

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