Anaemia:
WORD ORIGIN AND HISTORY
FORANAEMIA:
•1824,fromFrenchmedicalterm(1761),ModernLatin,
fromGreekanaimia"lackofblood,"fromanaimos
"bloodless,"froman-"without"(an-(1)+haima"blood"
(-emia).
CLASSIFICATION
1. BASED ON
MORPHOLOGY
2. BASED ON
ETIOLOGY
1. BASED ON MORPHOLOGY
1.Microcytic anemia
2.Normocytic anemia
3.Macrocytic anemia
1.Microcytic
Anemia
2.
Normocytic
Anemia
3.Macrocytic
Anemia
•Abnormallysmall
cellsarepresentin
theirondeficiency
anemiaandcertain
non iron
deficiencyanemia
•likesideroblastic
anemia and
thalassemia.
•RBC’sarenormal
inshapebut
anemiaoccursdue
tothebloodloss,
hemolysisorbone
marrowfailure.
•RBC’s are
normallylargein
shape.Itisusually
duetovitaminB
12
orfolicacid
deficiency.
Example:
megaloblastic
anemia.
On the basis of haemoglobin content in RBC, anemia may be:
1.Hypochromic:
•abnormally decreased haemoglobin content.
2. Normochromic:
•Normal haemoglobin content.
2. BASED ON ETIOLOGY
1. Anemia due to blood loss
2. Anemia due to impaired cell
production
3. Anemia due to increased cell
destruction
1. Anemia due to blood loss:
i. Acute post hemorrhagic anemia
ii. Chronic post hemorrhagic anemia
2. Anemia due to impaired cell
production
A.Deficiencyofsubstancesessentialforthe
erythropoiesis:
Irondeficiencyanemia
VitaminB
12andfolatedeficiency
B.Disturbanceofproliferationanddifferentiationof
stemcells:
Aplasticanemia
Aplasiaofpureredcells
D. Anemia due to bone marrow dysfunction:
•Leukemia
•Myelosclerosis
•Multiple myeloma
E. Congenital anemia:
•Sickle cell anemia
•Congenital dyserythropoietic defect anemia
3. Anemia due to increased cell
destruction
A. Anaemia due to intracorpusular defect:
Sickle cell anemia
Thalassemia
B. Anaemia due to extracorpusular defect:
Haemolytic disease of newborn
Effect of cytotoxic drugs
Effects of venoms or poisoning from substance like lead
Thermal injury or burn
Transfusion reactions
OTHER CAUSES:
Fluidoverload(hypervolemia)causesdecreased
hemoglobinconcentrationandapparentanemia
Generalcausesofhypervolemiaincludeexcessive
sodiumorfluidintake,sodiumorwaterretentionand
fluidshiftintotheintravascularspace.
•Other common symptoms
of anemia:
Extreme fatigue
Pale skin
Weakness
Shortness of breath
Chest pain
Frequent infections
Headache
Dizziness or light-headedness
Cold hands and feet
Inflammation or soreness of tongue
Brittle nails
Fast heartbeat
Unusual cravings for non-nutritive substances,
such as ice, dirt or starch
Poor appetite, especially in infants and children
with iron deficiency anemia.
An uncomfortable tingling or crawling feeling
in your legs (restless legs syndrome)
Foods and drugs that impair iron
absorption:
Takingoralironwithfoodreducesabsorption
Caffeinatedbeverages(especiallytea)
Calciumcontainingfoodsandbeverages
Calciumsupplements
Antacids
H-2receptorblockers
Protonpumpinhibitors
Factors that affect the absorption of iron supplements:
Theamountofironabsorbeddecreasesasdosesget
larger.Forthisreason,itisrecommendedthatmost
peopletaketheirprescribeddailyironsupplementin
twoorthreeequallyspaceddoses.
Oralironsupplementsmustdissolverapidlyinthe
stomachsothattheironcanbeabsorbedinthe
duodenumorupperjejunum.Enteric-coated
preparationsandlong-actingsupplementsmaybe
ineffective,sincetheydonotdissolveinthestomach.