Haematology Flashcards Preview

Medical Definitions > Haematology > Flashcards

Flashcards in Haematology Deck (22):
1

Mean Corpuscular Volume (MCV)

Average volume of a RBC

2

Mean Corpuscular Hb (MCH)

Average weight of Hb in a RBC

3

Mean Corpuscular Concentration MCHC

Conc of Hb in a RBC

4

Packed Cell Volume PCV
Haematocrit HCT

Ratio of the volume fo RBCs to the total blood volume

5

Red Cell Count

Actual number of RBCs per volume of blood

6

Red Cell Distribution Width RDW

Calculation of the variation in RBCs size

7

Reticulocyte Count

Number of immature red cells in circulation

8

Mean Platelet Volume MPV

Average volume of a platelet

9

Normocytic Normochromic

Normal size and staining characteristics of cells

10

Anisocytosis

Greater than normal variation in size of RBC

11

Poikilocytosis

Greater than normal variation in shape

12

Microcytosis

Small RBCs

13

Echinocyte

Spikey RBC, with many thorny projections. REVERSIBLE.

14

Acanthocyte

Spikey RBC, with many thorny projections. PERMANENT. Seen in liver disease

15

Schistiocyte

Fragmented RBC, usually as a result of mechanical damage e.g. turbulent blood flow. Elliptical

16

Rouleaux

Aggregations if RBCs into stacks

17

Microcytic anaemia

MCV less than 80
Caused by Decreased Hb

18

Macrocytic anaemia

MCV greater than 100
Caused by decreased DNA precursors

19

Give some causes of a microcytic anaemia

Iron deficiency
Thalasemias
Haemoglobinopathies

20

Give some causes of a normocytic anaemia

Chronic disease
Marrow disorders
Combined deficiencies
Increased destruction of RBCs

21

Give some causes of a macrocytic anaemia

Liver disease, alcohol
Metabolic disorders
Megaloblastic anaemia
Marrow disorders
B12 deficiency

22

What differentiates between an underproduction or destruction anaemia?

Reticulocyte Count
Over 3% is destructive
Under 3% is underproductive