Lab values & electrolytes worksheet with answers

For a fasting plasma glucose test, the patient should have had no caloric intake for at least:

1. A24 hours
2. B1 hour
3. C3 hours
4. D8 hours

What does the term "leukopenia" mean?

1. AA high white blood cell count
2. BA low white blood cell count
3. CA low red blood cell count
4. DA high platelet count

Which laboratory result is most closely linked to yellow skin and eyes (jaundice)?

1. ARaised serum bilirubin
2. BLow serum calcium
3. CRaised serum potassium
4. DLow platelet count

How does normal pregnancy usually affect serum creatinine?

1. AIt rises with every week
2. BIt falls, because GFR rises
3. CIt rises, because GFR falls
4. DIt stays exactly the same

A patient with diabetes is found unconscious with a blood glucose of 38 mg/dL (2.1 mmol/L). Which treatment is appropriate?

1. AOrange juice poured slowly into the patient's mouth
2. BGlucagon by injection, or IV dextrose as prescribed
3. CGlucose tablets placed between the patient's teeth
4. DA dose of rapid-acting insulin to stabilize the glucose

A patient's levothyroxine dose was changed today. When is the TSH usually rechecked?

1. AAfter about 1 year
2. BAfter about 6–8 weeks
3. CAfter about 3 days
4. DAfter about 24 hours

Which cerebrospinal fluid (CSF) pattern most strongly suggests bacterial meningitis?

1. AClear fluid, normal glucose, mildly raised protein, lymphocytes
2. BClear fluid, normal glucose, normal protein, no white cells
3. CCloudy fluid, low glucose, high protein, many neutrophils
4. DClear fluid, high glucose, low protein, many red cells

A patient on hemodialysis receives epoetin, but the hemoglobin has not risen in 2 months. Which results should be checked first?

1. AFerritin and transferrin saturation
2. BTSH and the free T₃ level
3. CAmylase and lipase levels
4. DTroponin and creatine kinase