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1.2 Haematology > Blood Film Examination > Flashcards

Blood Film Examination Flashcards

1
Q

How many platelets should be present in the field of view of a blood film?

A

5-10

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2
Q

What is a decrease in platelet numbers called?

A

Thrombocytopenia

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3
Q

What is an increase in platelet numbers called?

A

Thrombocytosis

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4
Q

What happens if platelets clump together?

A

An erroneous count on analyser

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5
Q

What diseases have red blood cell inclusions?

A

Malaria & Howell Jolly bodies

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6
Q

What does a malaria parasite look like?

A

Darker stained ‘headphone’ shaped inclusion in RBC

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7
Q

What does a Howell Jolly body look like?

A

Densely stained inclusion (remains of nucleus) - should be removed by spleen

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8
Q

When are target cells present?

A

The patient is suffering from Thalassemia - an abnormal haemoglobin molecules

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9
Q

When are spherocytes found?

A

Patients with hereditary spherocytosis

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10
Q

What are schistocytes?

A

Fragments of RBC, found in diseases where RBCs are broken down

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11
Q

What are sickle cells?

A

RBCs in a sickle shape in low oxygen tension in capillaries - sickle cell anaemia - abnormal haemoglobin

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12
Q

What are healthy RBCs called

A

Normocytic normochromic

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13
Q

What are abnormal small RBCs called?

A

Microcytic - iron deficiency

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14
Q

What are abnormal large RBCs called?

A

Macrocytic - B12/folate deficiency

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15
Q

What is it called when sizes vary in RBCs

A

Anisocytosis

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16
Q

What is a large variation in RBC shape called?

A

Poikilocytosis

17
Q

What should normochromic cells look like?

A

Reddish pink stain with - 1/4-1/3 central pallor

18
Q

What are hypochromic cells signs of?

A

Iron deficiency - anaemia

19
Q

What are hyperchromic RBCs called?

A

Spherocytes

20
Q

What is it called when RBCs have a lilac/blue tinge?

A

Polychromatic cells - immature RBCs - slightly macrocytic

21
Q

What is it called when RBCs stack up?

A

Rouleaux formation

1.2 Haematology (8 decks)

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