Lab values & electrolytes worksheet with answers

A serum sodium of 151 mEq/L is called:

1. AHyponatremia
2. BHypercalcemia
3. CHyperkalemia
4. DHypernatremia

What is the usual urine dipstick result for protein in a healthy adult?

1. AStrongly positive (+++)
2. BAlways moderately positive
3. CPositive only in the morning
4. DNegative or trace

Which laboratory test is used to monitor warfarin therapy?

1. AD-dimer
2. BPlatelet count
3. CaPTT
4. DPT with INR

Why is a baseline platelet count taken before starting heparin therapy?

1. ASo that the INR can be calculated from the platelet count later
2. BBecause heparin increases the platelet count to dangerous levels
3. CBecause heparin is given at a dose based on the platelet count
4. DSo a later fall from heparin-induced thrombocytopenia is detected

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

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

After pituitary surgery, a patient passes about 400 mL of pale urine per hour with a specific gravity of 1.002, and the sodium has risen to 149 mEq/L. Which condition is most likely?

1. AAcute kidney injury with oliguria
2. BSIADH
3. CHyperglycemia with ketoacidosis
4. DDiabetes insipidus

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 lowered potassium only
2. BDigoxin has raised the amiodarone level
3. CAmiodarone has raised the digoxin level
4. DThe patient has started a viral illness

During surgery under general anesthesia, a patient develops a rising end-tidal CO₂, muscle rigidity and tachycardia, then a high potassium and a rising temperature. Which condition is most likely?

1. AAcute hemolytic transfusion reaction
2. BHypovolemic shock
3. CHypoglycemia from fasting
4. DMalignant hyperthermia