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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Name: ____________________   Date: ____________

1.Easy

Which blood marker is the most specific for injury to the heart muscle?

  1. ALactate dehydrogenase
  2. BCardiac troponin
  3. CSerum myoglobin
  4. DTotal creatine kinase
2.Easy

What is the typical range of urine pH?

  1. AAbout 7.35–7.45
  2. BAbout 4.5–8.0
  3. CAbout 9.0–11.0
  4. DAbout 1.0–2.0
3.Easy

Which fasting blood glucose is within the typical normal range for an adult without diabetes?

  1. A140 mg/dL (7.8 mmol/L)
  2. B210 mg/dL (11.7 mmol/L)
  3. C45 mg/dL (2.5 mmol/L)
  4. D85 mg/dL (4.7 mmol/L)
4.Medium

A patient on carbamazepine becomes confused and has a headache. Which laboratory result would most likely explain this?

  1. AA high serum calcium
  2. BA low serum sodium
  3. CA high serum potassium
  4. DA low serum magnesium
5.Medium

Which IV fluid can be given through the same line as a red cell transfusion?

  1. ALactated Ringer's (Hartmann's) solution
  2. B0.9% sodium chloride
  3. C0.45% sodium chloride
  4. D5% dextrose in water
6.Medium

How does the nurse start a 24-hour urine collection at 08:00?

  1. ASave three samples spread across the day and discard all of the urine passed at night
  2. BSave the 08:00 urine as the first sample, then collect until 08:00 the next day
  3. CHave the patient void and discard that urine, then save all urine until 08:00 the next day
  4. DCollect only the first urine passed on waking, and repeat this the next morning
7.Hard

Four patients had a thyroidectomy earlier today. Which result should the nurse act on first?

  1. AHemoglobin 12.1 g/dL (121 g/L) after surgery
  2. BCalcium 7.2 mg/dL (1.8 mmol/L) with tingling lips
  3. CGlucose 145 mg/dL (8.0 mmol/L) after surgery
  4. DSodium 136 mEq/L on IV fluids after surgery
8.Hard

At the start of a shift, the nurse reviews four new results. Which patient needs attention first?

  1. AHemoglobin 11.0 g/dL (110 g/L) in a patient with rheumatoid arthritis
  2. BGlucose 180 mg/dL (10 mmol/L) after a meal in a patient with diabetes
  3. CSodium 119 mEq/L in a patient with new confusion and vomiting
  4. DPotassium 5.2 mEq/L in a patient with stable chronic kidney disease

Answer key

  1. 1. B · Cardiac troponin
  2. 2. B · About 4.5–8.0
  3. 3. D · 85 mg/dL (4.7 mmol/L)
  4. 4. B · A low serum sodium
  5. 5. B · 0.9% sodium chloride
  6. 6. C · Have the patient void and discard that urine, then save all urine until 08:00 the next day
  7. 7. B · Calcium 7.2 mg/dL (1.8 mmol/L) with tingling lips
  8. 8. C · Sodium 119 mEq/L in a patient with new confusion and vomiting

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