Lab values & electrolytes worksheet with answers

Free printable Lab values & electrolytes worksheet: 8 problems from easy to exam level, with an answer key. Print it or save it as a PDF.

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1.Easy

Which fasting triglyceride level is commonly described as normal?

  1. ABetween 200 and 499 mg/dL (2.3–5.6 mmol/L)
  2. BBelow 150 mg/dL (1.7 mmol/L)
  3. CAbove 500 mg/dL (5.6 mmol/L)
  4. DAbove 1,000 mg/dL (11.3 mmol/L)
2.Easy

Which type of white blood cell is normally the most numerous in an adult's blood?

  1. AMonocytes
  2. BLymphocytes
  3. CEosinophils
  4. DNeutrophils
3.Easy

Below about which blood glucose level is hypoglycemia usually defined and treated in a person with diabetes?

  1. A70 mg/dL (3.9 mmol/L)
  2. B126 mg/dL (7.0 mmol/L)
  3. C40 mg/dL (2.2 mmol/L)
  4. D100 mg/dL (5.6 mmol/L)
4.Medium

Which blood collection practice helps prevent hemolysis of the sample?

  1. AForcing blood quickly through a needle into the tube
  2. BUsing the smallest needle available for every patient
  3. CLeaving the tourniquet on for at least 3 minutes
  4. DGently inverting the tubes instead of shaking them
5.Medium

Which ECG change is linked to hypocalcemia?

  1. AA prominent delta wave
  2. BTall, peaked T waves
  3. CA shortened QT interval
  4. DA prolonged QT interval
6.Medium

In the US, when is a pregnant woman without known risk factors usually screened for gestational diabetes?

  1. AOnly after the baby is born
  2. BAt about 24–28 weeks of pregnancy
  3. CAt about 6–8 weeks of pregnancy
  4. DAt about 38–40 weeks of pregnancy
7.Hard

A patient's total calcium is 7.6 mg/dL and the albumin is 2.0 g/dL. Using the common correction (add 0.8 mg/dL for each 1 g/dL that albumin is below 4.0), what is the corrected calcium?

  1. A6.0 mg/dL, well below the normal range
  2. B9.2 mg/dL, within the normal range
  3. C11.6 mg/dL, above the normal range
  4. D7.6 mg/dL, below the normal range
8.Hard

A patient with heart failure takes lisinopril, spironolactone and a potassium supplement. Today the potassium is 6.0 mEq/L. What is the most likely explanation?

  1. ASpironolactone causes potassium loss
  2. BLisinopril lowers potassium
  3. CPotassium supplements have no effect on the serum level
  4. DSeveral medicines that raise potassium are being taken together

Answer key

  1. 1. B · Below 150 mg/dL (1.7 mmol/L)
  2. 2. D · Neutrophils
  3. 3. A · 70 mg/dL (3.9 mmol/L)
  4. 4. D · Gently inverting the tubes instead of shaking them
  5. 5. D · A prolonged QT interval
  6. 6. B · At about 24–28 weeks of pregnancy
  7. 7. B · 9.2 mg/dL, within the normal range
  8. 8. D · Several medicines that raise potassium are being taken together

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