Scheda di esercizi di Valori di laboratorio ed elettroliti con soluzioni

Why is AST less specific for liver damage than ALT?

1. AAST is found only in the kidney tubules
2. BAST is not measured in the blood at all
3. CAST is also found in heart and skeletal muscle
4. DAST is made by the bone marrow, not the liver

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

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

What does the term pancytopenia mean?

1. AHigh white cells with low platelets
2. BLow red cells, white cells and platelets
3. CLow red cells with normal platelets
4. DHigh red cells, white cells and platelets

When several samples are drawn at the same venipuncture, which tubes or bottles are filled first?

1. ABlood culture bottles
2. BCoagulation (citrate) tubes
3. CEDTA (complete blood count) tubes
4. DFluoride (glucose) tubes

When should the nurse check the glucose before giving a mealtime dose of rapid-acting insulin (such as lispro)?

1. ATwo hours after the meal, then giving the insulin dose
2. BAt bedtime only, then giving the mealtime insulin overnight
3. CJust before the meal, giving insulin when the food is ready
4. DOnly once a day, then giving the same dose before every meal

A pregnant woman's blood type is O Rh-negative, and her antibody screen (indirect Coombs test) is negative. What is usually offered at about 28 weeks?

1. AA transfusion of group O Rh-positive red cells
2. BDaily oral iron and folic acid supplements only
3. CAn IV dose of vitamin K given for the fetus
4. DAnti-D immunoglobulin (Rho(D) immune globulin)

A patient with advanced chronic kidney disease has a mildly raised troponin that has stayed the same on several tests over months. There is no chest pain and the ECG is unchanged. What is the best interpretation?

1. AProof of an acute myocardial infarction that needs emergency treatment now
2. BA laboratory error, because troponin is never raised in kidney disease
3. CA chronic stable rise; infarction needs a rising or falling pattern
4. DA sign of skeletal muscle injury, because troponin comes from all muscles

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. A450/µL
2. B1,800/µL
3. C360/µL
4. D4,500/µL