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 laboratory test is most typically raised in acute pancreatitis?

  1. AHemoglobin A1c
  2. BSerum troponin
  3. CSerum albumin
  4. DSerum lipase
2.Easy

An older adult is found on the floor after lying there for many hours. Which blood test best shows breakdown of skeletal muscle (rhabdomyolysis)?

  1. AHemoglobin A1c (HbA1c)
  2. BCreatine kinase (CK)
  3. CSerum albumin
  4. DSerum lipase
3.Easy

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

  1. A3 hours
  2. B24 hours
  3. C8 hours
  4. D1 hour
4.Medium

A patient with sickle cell disease takes hydroxyurea. Which laboratory test is monitored regularly for an adverse effect?

  1. AUrine ketone level
  2. BSerum lithium level
  3. CSerum amylase level
  4. DComplete blood count
5.Medium

A 55-year-old has a positive fecal immunochemical test (FIT) during routine screening. What is the usual next step?

  1. ARepeat the test in 10 years
  2. BNo action if there are no symptoms
  3. CReferral for colonoscopy
  4. DStart an iron supplement only
6.Medium

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. AStaphylococcus aureus
  2. BCandida albicans
  3. CGroup B Streptococcus
  4. DHepatitis B virus
7.Hard

A patient on stable digoxin starts amiodarone. A week later, the patient has nausea and visual changes, and the digoxin level is above the range. What is the most likely explanation?

  1. AAmiodarone has raised the digoxin level
  2. BDigoxin has raised the amiodarone level
  3. CThe patient has started a viral illness
  4. DAmiodarone has lowered potassium only
8.Hard

A patient with severe hypertriglyceridemia has a measured sodium of 128 mEq/L, but a measured serum osmolality is normal, and the patient has no symptoms. What is the most likely explanation?

  1. ATrue hyponatremia from SIADH that needs fluid restriction
  2. BHyponatremia caused by severe hyperglycemia in diabetes
  3. CHyponatremia caused by drinking far too much water
  4. DPseudohyponatremia, an artifact caused by very high lipids

Answer key

  1. 1. D · Serum lipase
  2. 2. B · Creatine kinase (CK)
  3. 3. C · 8 hours
  4. 4. D · Complete blood count
  5. 5. C · Referral for colonoscopy
  6. 6. C · Group B Streptococcus
  7. 7. A · Amiodarone has raised the digoxin level
  8. 8. D · Pseudohyponatremia, an artifact caused by very high lipids

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