Lab values & electrolytes worksheet with answers

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

1. ASerum myoglobin
2. BLactate dehydrogenase
3. CTotal creatine kinase
4. DCardiac troponin

The serum total protein is made up mainly of:

1. ASodium and chloride
2. BGlucose and urea
3. CHemoglobin and iron
4. DAlbumin and globulins

Using American Diabetes Association (ADA) criteria, a fasting plasma glucose of 100–125 mg/dL (5.6–6.9 mmol/L) is classed as:

1. AType 1 diabetes mellitus
2. BMild hypoglycemia (low glucose)
3. CPrediabetes (impaired fasting glucose)
4. DNormal fasting glucose for an adult

A patient had a total thyroidectomy yesterday. Which laboratory value is most important to monitor in the first days after surgery?

1. ASerum glucose
2. BSerum potassium
3. CSerum sodium
4. DSerum calcium

A patient with cirrhosis has an albumin of 2.2 g/dL (22 g/L). Which finding is most likely related?

1. AIncreased urine output
2. BEdema and ascites
3. CHigh blood pressure
4. DHyperkalemia

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

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

A patient has fatigue, weight loss, darkening of the skin and low blood pressure. Results: sodium 130 mEq/L, potassium 5.6 mEq/L. Which test pattern would confirm primary adrenal insufficiency (Addison disease)?

1. ALow cortisol with a low ACTH
2. BHigh cortisol with a low ACTH
3. CHigh cortisol with a high ACTH
4. DLow cortisol with a high ACTH

A patient has a continuous heparin infusion for a pulmonary embolism. A new nurse plans to adjust the infusion using today's INR of 1.1. What should the experienced nurse explain?

1. AHeparin needs no laboratory monitoring once the infusion is started
2. BHeparin is adjusted using the aPTT or anti-Xa level, not the INR
3. CThe INR of 1.1 means the heparin rate must be doubled at once
4. DThe INR is the correct test, and 1.1 means heparin is therapeutic