Lab values & electrolytes worksheet with answers

About what proportion of total serum calcium is in the free (ionized) form?

1. AAbout half
2. BAbout one tenth
3. CAlmost none
4. DNearly all

For a person who is not taking an anticoagulant, the INR is typically about:

1. A0.8–1.2
2. B3.5–4.5
3. C2.0–3.0
4. D5.0–6.0

At what time of day is serum cortisol normally highest?

1. AEarly morning
2. BAround midnight
3. CAfter the evening meal
4. DLate afternoon

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

1. AMuscle weakness and leg cramps
2. BTall, peaked T waves on the ECG
3. CDiarrhea and abdominal cramping from overactive bowels
4. DTingling around the mouth with a positive Chvostek’s sign

A patient has IV fluids running into the left forearm. Where should the nurse take a blood sample?

1. AFrom just above the IV site in the same arm
2. BFrom any vein, since the fluid does not affect results
3. CFrom the opposite arm
4. DFrom the IV cannula while the fluid is running

A patient with heart failure takes lisinopril, spironolactone and a potassium supplement. Today the potassium is 6.0 mEq/L. What is the most likely explanation?

1. ASpironolactone causes potassium loss
2. BSeveral medicines that raise potassium are being taken together
3. CLisinopril lowers potassium
4. DPotassium supplements have no effect on the serum level

A patient receiving chemotherapy has a white cell count of 1.8 × 10³/µL with 20% neutrophils and 5% bands. What is the absolute neutrophil count (ANC)?

1. A1,800/µL
2. B360/µL
3. C450/µL
4. D4,500/µL