Lab values & electrolytes worksheet with answers

Which blood test is the usual measure of a person's vitamin D status?

1. ASerum phosphate
2. B1,25-dihydroxyvitamin D
3. C25-hydroxyvitamin D
4. DParathyroid hormone

Which fasting triglyceride level is commonly described as normal?

1. AAbove 1,000 mg/dL (11.3 mmol/L)
2. BBetween 200 and 499 mg/dL (2.3–5.6 mmol/L)
3. CBelow 150 mg/dL (1.7 mmol/L)
4. DAbove 500 mg/dL (5.6 mmol/L)

A positive hepatitis B surface antigen (HBsAg) test means:

1. AThe person had hepatitis A in the past
2. BThe person has never met the virus
3. CThe person currently has hepatitis B infection
4. DThe person is immune from vaccination only

Which ECG change is linked to hypocalcemia?

1. AA prominent delta wave
2. BA shortened QT interval
3. CA prolonged QT interval
4. DTall, peaked T waves

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

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

A patient taking furosemide has a potassium of 2.9 mEq/L. Which finding would the nurse expect?

1. ADiarrhea and abdominal cramping from overactive bowels
2. BTingling around the mouth with a positive Chvostek’s sign
3. CMuscle weakness and leg cramps
4. DTall, peaked T waves on the ECG

A patient with a sodium of 132 mEq/L and blood glucose of 600 mg/dL (33.3 mmol/L) is admitted. Why is the sodium value interpreted with care?

1. AGlucose has no effect on the measured sodium
2. BHigh glucose raises the measured sodium falsely, so it is really lower
3. CHigh glucose draws water into the blood, diluting the sodium
4. DThe sodium result must be a laboratory error

Which pattern of results fits SIADH?

1. AHigh serum sodium, high serum osmolality and very dilute urine
2. BLow serum sodium, high serum osmolality and dilute urine
3. CLow serum sodium, low serum osmolality and concentrated urine
4. DNormal sodium with very dilute urine