Werkblad Laboratoriumwaarden en elektrolyten met antwoorden

What is a typical reference range for the hematocrit in an adult woman?

1. AAbout 55–65%
2. BAbout 20–28%
3. CAbout 10–15%
4. DAbout 35–45%

The HbA1c reflects the average blood glucose over about which period?

1. AThe past 1–2 years
2. BThe past 2–3 months
3. CThe past 24 hours
4. DThe past 1–2 weeks

Wat is een typisch referentiebereik voor serummagnesium bij volwassenen?

1. AOngeveer 1,3–2,1 mEq/L (0,65–1,05 mmol/L)
2. BOngeveer 3,5–5,0 mEq/L (1,75–2,5 mmol/L)
3. COngeveer 6,0–8,0 mEq/L (3,0–4,0 mmol/L)
4. DOngeveer 0,3–0,7 mEq/L (0,15–0,35 mmol/L)

A patient has taken hydrochlorothiazide for several years. Which laboratory change is a recognized effect of this drug?

1. AA fall in serum calcium
2. BA rise in serum uric acid
3. CA rise in serum potassium
4. DA fall in blood glucose

Why must vitamin B₁₂ deficiency be ruled out before treating macrocytic anemia with folic acid alone?

1. AFolic acid blocks the absorption of all B₁₂ from the diet
2. BFolic acid causes iron overload when B₁₂ levels are low
3. CFolic acid can fix the anemia while B₁₂-related nerve damage continues
4. DFolic acid makes B₁₂ deficiency anemia much worse within a few days

A nurse completed the hepatitis B vaccine series. Which result shows protective immunity?

1. AA positive IgM anti-HBc
2. BAnti-HBs of 10 mIU/mL or more
3. CA positive HBsAg test
4. DA raised ALT level

A patient on high-dose dexamethasone has a white cell count of 15 × 10³/µL, mostly mature neutrophils with no bands. They have no fever and no signs of infection. What is the most likely explanation?

1. AA laboratory error, because steroids always lower the white count
2. BCertain sepsis that needs antibiotics started without delay
3. CA new leukemia that is confirmed by this result alone
4. DA steroid effect that moves neutrophils into the circulating blood

A patient with long-standing rheumatoid arthritis has a hemoglobin of 10,5 g/dL (105 g/L), a low serum iron, a low total iron-binding capacity (TIBC) and a high-normal ferritin. Which condition fits best?

1. AVitamin B₁₂ deficiency anemia
2. BAnemia of chronic disease (inflammation)
3. CIron-deficiency anemia
4. DAcute blood loss anemia