Werkblad Laboratoriumwaarden en elektrolyten met antwoorden

The tumor marker CA-125 is most often used to follow which cancer?

1. AOvarian cancer
2. BColon cancer
3. CLung cancer
4. DThyroid cancer

Welke bevinding is typisch voor een hoog serummagnesium?

1. ACarpale kramp wanneer een manchet wordt opgeblazen
2. BEen sterke drang om water te drinken
3. CVerminderde of afwezige peesreflexen
4. DOveractieve reflexen en spiertrekkingen

A blood lactate level above about which value is usually considered raised in an adult?

1. A2 mmol/L
2. B20 mmol/L
3. C0,2 mmol/L
4. D10 mmol/L

When should a blood specimen tube be labeled?

1. ABefore entering the room, so tubes are ready for the next patients
2. BAt the nurses' station, after all samples for the shift are drawn
3. CAt the bedside, in the patient's presence, using two identifiers
4. DIn the laboratory, by the staff who receive the unlabeled sample

A patient has macrocytic anemia with numbness and tingling of the feet and poor balance. Which deficiency is most likely?

1. AIron (low ferritin)
2. BFolate (folic acid)
3. CVitamin B₁₂
4. DVitamin C (ascorbic acid)

A trauma patient receives 2 L of IV crystalloid. The hemoglobin falls from 13,0 to 11,4 g/dL (130 to 114 g/L), and the vital signs are now stable. Which explanation is most likely?

1. ADilution of the blood by the IV fluid
2. BIncreased red cell production
3. CA laboratory error in the first sample
4. DA sudden failure of the bone marrow

A 68-year-old man has fatigue, a hemoglobin of 9,8 g/dL (98 g/L), an MCV of 72 fL and a low ferritin. He eats a normal diet. What is the most important next step?

1. ALook for a source of blood loss in the gut
2. BRepeat the blood count in one year
3. CGive iron and do no further tests at all
4. DStart vitamin B₁₂ injections

A child with sickle cell disease and a recent viral illness is pale and tired. The hemoglobin has fallen sharply, and the reticulocyte count is very low. What is the most likely problem?

1. AA vaso-occlusive pain crisis in the bones
2. BIron deficiency from a poor diet over months
3. CAn aplastic crisis, often caused by parvovirus B19
4. DA normal finding in sickle cell disease