Scheda di esercizi di Valori di laboratorio ed elettroliti con soluzioni

In a person with HIV infection, a CD4 count below which level defines AIDS?

1. A50 cells/µL
2. B1,000 cells/µL
3. C500 cells/µL
4. D200 cells/µL

Serum amylase is less specific than lipase for pancreatitis because amylase also comes from:

1. AThe heart muscle
2. BThe bone marrow
3. CThe salivary glands
4. DThe thyroid gland

Which laboratory test is used to diagnose sickle cell disease?

1. ASerum ferritin and transferrin saturation
2. BHemoglobin electrophoresis
3. CErythrocyte sedimentation rate
4. DProthrombin time with INR

For most hospitalized adults with diabetes who are critically ill, which glucose target range is commonly recommended?

1. AAbout 300–350 mg/dL (16,7–19,4 mmol/L)
2. BAbout 60–80 mg/dL (3,3–4,4 mmol/L)
3. CAbout 140–180 mg/dL (7,8–10 mmol/L)
4. DAbout 250–300 mg/dL (13,9–16,7 mmol/L)

When blood is drawn from a central venous catheter, why is a small volume of blood usually discarded first, according to policy?

1. ATo lower the patient's hemoglobin for a blood transfusion
2. BTo remove blood clots that form in all central lines
3. CTo avoid diluting the sample with flush or infusion fluid
4. DTo check that the catheter tip is still in the right vein

A patient takes low-dose methotrexate weekly for rheumatoid arthritis. Which laboratory tests are monitored regularly?

1. AComplete blood count, liver tests and kidney function
2. BSerum lithium, sodium and urine specific gravity
3. CTroponin, creatine kinase and myoglobin
4. DSerum amylase, lipase and blood ketones

A patient has a hematocrit of 60% and a raised red cell mass. Which result suggests polycythemia vera rather than secondary polycythemia from chronic hypoxia?

1. AA low oxygen saturation
2. BA high carboxyhemoglobin
3. CA high erythropoietin level
4. DA low erythropoietin level

Which cerebrospinal fluid (CSF) pattern most strongly suggests bacterial meningitis?

1. AClear fluid, high glucose, low protein, many red cells
2. BClear fluid, normal glucose, mildly raised protein, lymphocytes
3. CCloudy fluid, low glucose, high protein, many neutrophils
4. DClear fluid, normal glucose, normal protein, no white cells