Lab values & electrolytes worksheet with answers

What is a typical reference range for the prothrombin time (PT) in a person not taking anticoagulants?

1. AAbout 2–4 seconds
2. BAbout 60–90 seconds
3. CAbout 3–5 minutes
4. DAbout 11–13.5 seconds

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

1. AAbout half
2. BAlmost none
3. CNearly all
4. DAbout one tenth

What does the term "thrombocytosis" mean?

1. AA low red cell count
2. BA low platelet count
3. CA high white cell count
4. DA high platelet count

A young adult with new diabetes has a very low C-peptide level. What does this suggest?

1. AThe pancreas is making very little insulin, as in type 1 diabetes
2. BThe patient has high insulin resistance, as in type 2 diabetes
3. CThe kidneys are excreting all of the patient's insulin in urine
4. DThe patient is injecting too much insulin and needs a lower dose

A patient starts lisinopril (an ACE inhibitor). Which laboratory values should the nurse expect to be monitored?

1. APotassium and creatinine
2. BCalcium and phosphate
3. CALT and bilirubin
4. DTSH and free T₄

A patient receives repeated nebulized albuterol (salbutamol) for severe asthma. Which laboratory change should the nurse watch for?

1. AA rise in serum sodium
2. BA fall in blood glucose
3. CA rise in serum calcium
4. DA fall in serum potassium

A young man has a swollen knee after minor trauma. His aPTT is prolonged, but his PT/INR and platelet count are normal. Which condition fits best?

1. AVitamin K deficiency from poor diet
2. BImmune thrombocytopenia (ITP)
3. CHemophilia A (factor VIII deficiency)
4. DDisseminated intravascular coagulation

A patient has a sodium of 150 mEq/L, a glucose of 180 mg/dL and a BUN of 28 mg/dL. Using the formula 2 × Na + glucose/18 + BUN/2.8, what is the calculated serum osmolality?

1. AAbout 358 mOsm/kg, which is high
2. BAbout 300 mOsm/kg, which is normal
3. CAbout 285 mOsm/kg, which is normal
4. DAbout 320 mOsm/kg, which is high