2. 2
Definition of anaemia
Anaemia is defined as a reduction in the
haemoglobin concentration of the blood
This results in a decreased oxygen
carrying capacity
4. Normal values for peripheral blood
Female Male
Erythrocytes (per µl) 4.8±0.6x106 5.4±0.8x106
Hemoglobin (g/dl) 14 ± 2 16 ±2
Hematocrit (%) 42 ±5 47 ±5
Reticulocytes (%) 1 1
___________________________________________
Mean corpuscular volume (MCV; µm3) 82-92
Mean corpuscular hemoglobin (MCH; pg) 27-32
Mean corpuscular hemoglobin concentration (MCHC; %) 32-36
5. Etiologic classification of anemias (1)
I. Impaired red cell production
A. Disturbance of proliferation and differentiation of
stem cells ( aplastic anemia, pure red cell aplasia)
B. Disurbance of proliferation and maturation of
erythrocytes:
1.Defective DNA synthesis (megaloblastic anemias)
2.Defective Hb synthesis:
a/. Deficient heme synthesis (iron deficiency)
b/. Deficient globin synthesis (thalassemia)
3. Unknown or multiple mechanisms (anemia of chronic
disease, anemia of marrow replacement)
6. Etiologic classification of anemias (2)
II. Increased rate of destruction (hemolytic anemias)
A. Intrinsic abnormalities
Hereditary
1. Red cell membrane defects (hereditary spherocytosis,
hereditary eliptocytosis)
2. Red cell enzyme deficiencies
a/. Glycolytic enzymes: pyruvate kinase, hexokinase
b/. Enzymes of hexose monophosphate shunt:
G-6PD, glutathione synthetase
3. Disorders of globin synthesis
a/. Deficient globin synthesis (thalassemia)
b/. Structurally abnormal globin synthesis
(sickle cell anemia, unstable hemoglobins)
Acquired
1. Membrane defect: paroxysmal nocturnal hemoglobinuria
7. Etiologic classification of anemias (3)
B. Extrinsic abnormalities
1. Antibody mediated
a/. Autoantibodies (idiopathic, drug-associated,
SLE, malignancies)
b/. Isohemagglutinins (transfusion reactions,
erythroblastosis fetalis)
2. Mechanical trauma of RBC
a/. Microangiopathic hemolytic anemias (thrombotic
thrombocytopenic purpura, DIC)
b/. Cardiac traumatic hemolytic anemia
3. Chemicals and microorganisms
4. Sequestration in mononuclear phagocytic system
- hypersplenism
10. Morphologic classification of anemias
Type MCV MCHC Common cause
________________________________________________________
Macrocytic anemia increased normal Vitamin B12 deficiency
Folic acid deficiency
Microcytic anemia
- hypochromic decreased decreased Iron deficiency
Thalassemia
- normochromic decreased normal Spherocytosis
or normal
Normocytic anemia normal normal Aplastic anemia
- normochromic Chronic renal failure
Some hemolytic anemia
13. Classification of Anaemia:
Normocytic Normochromic
MCV 80-100fl
MCH >26pg
Often incidental finding in systemic disorders
May be first manifestation of a systemic
disorder
Many haemolytic anaemias
Anaemia of chronic disease (some cases)
After acute blood loss
Bone marrow failure, e.g. Post-chemotherapy,
infiltration by carcinoma etc
21. 21
Normal Hb F levels
newborn 70-90%
6 months old 2-13%
1 year 1-5%
2 years <2%
information on age of patient is important:
interpretation of Hb levels
premature: delay in Hb switch (fetal to adult)
22. 22
How is Thalassemia Classified?
Thalassemia
thalasemia hemoglobinopathies
23. Genotypes to phenotypes of thalassemia
Molecular defects (mutations)
-globin gene -globin gene
( -thalassemia) ( -thalassemia)
-globin chains /- -globin chains /-
Excess of Excess of
-globin chains (fetus) -globin chains
-globin chains (adult)
24. 24
Pathophysiology of thalassemia syndromes
globin chain imbalance
(excess or chains)
excess chains precipitate in RBC
RBC damage
•ineffective erythropoiesis
•peripheral hemolysis
anemia
25. 25
Clinical aspects: thalassemia syndromes
syndrome clinical age of need for
presentation BT
trait asymptomatic any age none
( normal
Hb)
thal- moderately after age 2 or none, occ
intermedia severe later some
(7-10 gm/dl)
thal- ( 0/ 0) severe 1-2 regular
major
(<7 gm/dl) ( 0/ 0)) fatal in-utero / birth
27. Identification of classical beta-thalassemia trait
in an adult
hallmark for classical beta-thalassaemia trait:
raised Hb A2
27
28. 28
Hb subtypes in the newborn
information on age of patient is important:
full-term or premature
Hb subtypes in normal newborn
F( 2 2): 70-90%
A( 2 2): 10-30%
*A2( 2 2): 0% (not measurable by HPLC)
29. THALASSEMIA-β
HETEROZIGOT HOMOZIGOT βo HOMOZIGOT β+ dan β+
• Asimptomatik • Anemia berat sejak usia < 1 • Anemia ringan sampai berat
• Anemia ringan s/d berat tahun • Hati dan limpa normal atau
• Hb 8-15 g/dL (rata-rata 12) • Perlu transfusi rutin membesar
• MCV < 80 fl • Hati dan limpa membesar • Masih mempunyai HbA
• HbA2 > 3.5% • MCV < 70 fl • HbF dari 10 s/d > 90%
• HbF ≥ 1% • Jenis Hb hanya HbA2 and HbF
• HbF > 90%
30. 30
Clinical severity of -thal syndrome: related to number of
functional -globin genes
functional globin genes
trait
mild ( +) -thal 2 (- / ) 3
severe ( 0) -thal 1(--/ ) 2
Hb H disease
moderate 0 / +
(--/- ) 1
more severe 0 / T (--/ T) 1
Hb Bart’s hydrops 0 / 0 (--/--) 0
fetalis
31. 31
0 or -thal 1 trait
H inclusion test positive:
1 RBC cell per 5000 or 10,000 RBC
may be negative
cannot be done in newborn
`golf ball
inclusions’
35. FENOTIP THALASSEMIA - (CARRIER)
Normal - /- - /
/
Normal N/anemia ringan Normal
MCH : 27-31 pg < 25 pg 25-27pg
HbA2 : 2.5-3.5% normal or ↓ normal or ↓
HbF : <1% ↓ atau (-) ↓ atau (-)
39. Anamnesis/Pedigree
Pucat lama (kronik)
Riwayat keluarga dengan penyakit serupa
Ras
Anorexia
Gangguan Pertumbuhan
40. Probability Thalassemia
Orang Tua
Thalassemia Trait Orang Tua
Thalassemia
Trait
Thalassemia Thalassemia
Normal Trait Mayor
41. Probability Thalassemia
Orang Tua
Orang Tua
Thalassemia
Thalassemia
Mayor
Trait
Thalassemia Thalassemia Thalassemia Thalassemia
Trait Mayor Trait Mayor
45. Pemeriksaan laboratorium (1)
Darah perifer:
- Hb rendah / normal
- MCV <80fl dan MCH <27pg,
- Retikulosit agak meningkat
- Jumlah leukosit normal
- Hitung jenis normal
46. 46
Pemeriksaan Hematologi
MCV : ukuran eritrosit dibandingkan dengan inti
limfosit kecil (Normal)
MCH : warna eritrosit atau content dari hemoglobin
RDW : perbedaan ukuran eritrosit.
semakin besar variasi eritrosit
semakin besar RDW
47. 47
Pemeriksaan Hematologi
RDW-SD:mengukur lebar kurva. Bila kurva makin lebar
makan RDW SD semakin lebar
Nilai Normal :
perempuan: 36.4 – 46.3fL
Laki-laki: 35.1 – 43.9fL
RDW-CV: dihitung dengan formula:
RDW-CV = 1SD/MCV x 100 %
1SD merupakan variasi eritrosit sekitar mean ukuran eritrosit
Nilai Normal :
perempuan: 11.7 – 14.4 %
Laki-laki: 11.6 – 14.4 %
55. Diagram migrasi fraksi Hb hasil elektroforesa pada pH alkali & asam
H
Bart’s
+ Portland +
C
A
F Origin
H
S
S, D, G,
Lepore
A, A2, D, E, G, O
A2, E, C Lepore
Constant spring F, Bart’s, Portland
- Origin -
pH alkali (8,5) pH asam (6.0)
(Pemeriksaan Laboratorium Klinik Thalassemia & Hemoglobin Varian; Riady Wirawan, Dr, SpPK
FKUI, 1997)
56. Digunakan alat HPLC Variant
Tes-tes Hb yang dapat dilakukan di alat Variant :
Beta Thal Short
Sickle Cell Short
Alpha Thal Short
Globin Chains
HbA1c
65. Badan Inklusi HbH
HbH adalah hemoglobin yang tidak stabil akan
mengalami denaturasi oksidatif dan presipitasi
jika eritrosit terpapar dengan zat warna new
methylene blue atau brilliant cresyl blue dan
membentuk gambaran seperti “bola golf”
Badan inklusi HbH dijumpai pada eritrosit
penderita :
- HbH
- Thalassemia a-1 trait, (1/100–1/10.000 eritrosit),
67. 67
Limitations in new born
adult with thalassemia normal newborn
Blood counts Hb: N or High Hb (14-20 g/dl)
MCV<80 fl, MCH<27pg MCV fl>105 fl,
MCH>27pg
Blood films Hypochromia Effects of relative
Thalassemia picture hyposplenism
Hb subtypes Hb A2:4% -thal trait Hb F: 90-100%
Hb F(95-100%): -thal major Hb A: 5-20%
Hb A2: not measurable
H-inclusion test -thalassemia: + cannot be used
68. Thalassemia merupakan penyakit yang dapat
menurunkan kualitas hidup
Memerlukan biaya yang cukup besar untuk terapi
thalassemia (terutama pasien thalassemia yang
membutuhkan transfusi sepanjang hidupnya
Insiden thalassemia dapat diminimalkan melalui
pemeriksaan skrining yang optimal (Total Solution)
Meningkatkan kesadaran masyarakat mengenai
penyakit thalassemia dan akibatnya