Werkblad Laboratoriumwaarden en elektrolyten met antwoorden

Which drug is routinely monitored with blood levels because of its narrow therapeutic range?

1. ALoratadine
2. BLithium
3. CAmoxicillin
4. DOmeprazole

Wat is een typisch referentiebereik voor serumfosfaat bij volwassenen?

1. AOngeveer 5,5–7,5 mg/dL (1,8–2,4 mmol/L)
2. BOngeveer 2,5–4,5 mg/dL (0,8–1,5 mmol/L)
3. COngeveer 8,5–10,5 mg/dL (2,1–2,6 mmol/L)
4. DOngeveer 0,5–1,5 mg/dL (0,2–0,5 mmol/L)

Why is serum creatinine a better marker of kidney function than BUN?

1. AIt is not filtered by the kidneys, so its level stays very stable
2. BIt is made by the liver, so it rises in every kind of illness
3. CIt is less affected by diet, hydration and bleeding in the gut
4. DIt is affected mainly by protein intake, which is easy to control

A patient taking a statin reports new, unexplained muscle pain and weakness. Which laboratory test would the nurse expect to be ordered?

1. ASerum lipase
2. BCardiac troponin
3. CSerum ammonia
4. DCreatine kinase (CK)

A patient with an upper gastrointestinal bleed has a BUN of 48 mg/dL (urea 17 mmol/L) and a normal creatinine. What is the most likely explanation?

1. AThe liver has stopped making urea because of the bleeding
2. BThe kidneys have suddenly lost most of their function
3. CSkeletal muscle is breaking down because of the blood loss
4. DDigested blood adds protein, which the liver turns into urea

A stool test for Clostridioides difficile is ordered. Which sample is appropriate?

1. AA formed, hard stool sample
2. BA rectal swab from a patient with constipation
3. CAny stool after a laxative dose
4. DAn unformed (liquid or soft) stool

After a crush injury, a patient's urine dipstick is strongly positive for blood, but microscopy shows almost no red cells. CK is very high. What best explains this?

1. AThe sample was contaminated with menstrual blood
2. BA kidney stone is scraping the ureter lining
3. CMyoglobin from damaged muscle is in the urine
4. DBleeding is coming from the bladder lining

A patient's bedside glucose meter shows "HI" (above its measuring range). The patient is drowsy. What should the nurse do?

1. ASend a venous sample to the lab and inform the provider at once
2. BGive oral glucose in case the reading is wrong and the patient is low
3. CAssume the meter is broken and give the usual insulin dose
4. DRecord "HI" and repeat the meter test at the next scheduled time