CLINICAL PATHOLOGY Hematologyvlm.ub.ac.id/pluginfile.php/38947/mod_resource/content/1... · 2019....
Transcript of CLINICAL PATHOLOGY Hematologyvlm.ub.ac.id/pluginfile.php/38947/mod_resource/content/1... · 2019....
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CLINICAL PATHOLOGYHematology
Drh. Ahmad Fauzi, M.Sc
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Introduction
• Hematology: the study of blood and blood forming tissues.
• Blood consists of 55% plasma and 45% formed elements.
• Formed elements include erythrocytes, leukocytes, and thrombocytes.
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• PLASMA – Alb, Glob, Fibrin
• BUFFYCOAT - Formed
elements include leukocytes,
and thrombocytes.
• HEMATOKRIT - Eritrosit
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PLASMA
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Components of Blood
• Plasma• Transport mechanism
• 90-92% water.
• 6-7% proteins (Albumin, globulin, fibrinogen)
• 2-3% • Fats
• Carbohydrates (glucose)
• Electrolytes
• Gases (O2, CO2)
• Chemical messengers
Plasma Components
Other
3%
Protein
7%
Water
90%
Serum adalah plasma darah yang telah diambil
fibrinogennya.
Fibrinogen adalah protein yang esensial dalam
dalam proses pembekuan darah.
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CELLULAR
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Hematology
Spleen
Kidneys
LiverBone
Marrow
Blood
HematopoieticSystem
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Cellular Components
Pluripotent Stem Cell
Myeloid MultipotentStem Cells
Common LymphoidStem Cells
UnipotentProgenitors
BasophilsEosinophilsNeutrophilsMonocytes
Lymphocytes
ErythrocytesThrombocytes
Erythropoietin
WBC’sRBC’s
Platelets
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ERITROSIT
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Erythrocytes
• Biconcave shape.
• Diameter 7 microns.
• Cells for transport of O2 and CO2.
• Life span 120 days.
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Components of Blood
• Red Blood Cells• Erythrocyte
• Hemoglobin – O2 bearing molecule• Comprised of 4
subunits:
• Globin (binds to 1 O2 molecule)
• Heme (iron)
• 100% saturation = 4 globin subunits carrying O2
• Each gram of hemoglobin = 1.34 ml O2
Cellsalive.com
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Components of Blood
• Red blood cell production• Erythropoiesis
• Erythropoietin
• Hemolysis
• Sequestration
• Laboratory analysis of red blood cells• Red blood cell count
• Hematocrit
• Hemoglobin
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Diseases of Erythrocytes
• Anemia ( RBC, Hb & Hematokrit)
• Anemias• Anemia is a sign, not a separate disease process.
• Signs and symptoms may not be present until the body is stressed.
• Differentiate chronic anemia from acute episode.
• Treat signs and symptoms.• Maximize oxygenation and limit blood loss.
• Establish IV therapy if indicated.
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ABNORMALITAS MORFOLOGI
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ABNORMALITAS MORFOLOGI
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Diseases of Erythrocytes
Brady; Paramedic Care Principles and Practice
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Diseases of Erythrocytes
• Sickle Cell Disease• Normal red cells maintain
their shape as they pass through the capillaries and release oxygen to the peripheral tissues (upper panel). Hemoglobin polymers form in the sickle rell cells with oxygen release, causing them to deform. The deformed cells block the flow of cells and interrupt the delivery of oxygen to the tissues (lower panel).
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Diseases of Erythrocytes
• Sickle Cell Disease (cont.)• Sickle cell crises
• Vaso-occlusive
• Musculoskeletal/abdominal pain
• Priapism
• Renal/cerebral infarctions
• Hematological• Lowered hemoglobin
• Splenic sequestration
• Infectious
• Management• Follow general treatment guidelines prn.
• Consider analgesics.
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Diseases of Erythrocytes
• Polycythemia• Overproduction of erythrocytes.
• secondary dehydration.
• Most deaths due to thrombosis
• Results in bleeding abnormalities:• Epistaxis, spontaneous bruising, GI bleeding.
• Management:• Follow general treatment guidelines.
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Hematokrit (HCT)/ Packed cell volume (PCV)
• Hematokrit Adalah persentase sel darah merah tehadap volume darah total.
• Penurunan nilai Hct merupakan indikator anemia (karena berbagai sebab), reaksi hemolitik, leukemia, sirosis, kehilangan banyak darah dan hipertiroid.
• Peningkatan nilai Hct dapat terjadi pada eritrositosis, dehidrasi, kerusakan paru-paru kronik, polisitemia dan syok.
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Know Normal Ranges!!!
WBC
RBC
HGB
HCT
MCV
MCH
MCHC
PLT
MPV
SEGS
LYMPHS
MONOCYTES
EOSINOPHILS
BASOPHILS
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Mean Corpuscular Volume (MCV) (Volume korpuskuler rata – rata)• MCV adalah indeks untuk menentukan ukuran sel darah merah.
• MCV menunjukkan ukuran sel darah merah tunggal apakah sebagai
Normositik (ukuran normal)
Mikrositik (ukuran kecil < 80 fL), atau
Makrositik (ukuran kecil >100 fL).
• Penurunan nilai MCV terlihat pada pasien anemia kekurangan besi, anemia pernisiosa dan talasemia, disebut juga anemia mikrositik.
• Peningkatan nilai MCV terlihat pada penyakit hati, alcoholism, terapi antimetabolik, kekurangan folat/vitamin B12, dan terapi valproat, disebut juga anemia makrositik
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Mean Corpuscular Hemoglobin Concentration (MCHC) (Konsentrasi Hemoglobin Korpuskuler rata – rata)
• Indeks MCHC mengukur konsentrasi Hb rata-rata dalam sel darah merah; semakin kecil sel, semakin tinggi konsentrasinya.
• Perhitungan MCHC tergantung pada Hb dan Hct.
• Penurunan MCHC (hipokromik) terjadi pada pasien kekurangan besi, anemia mikrositik, anemia karena piridoksin, talasemia
• Peningkatan MCHC (hiperkromik) terjadi pada sferositosis, bukan anemia pernisiosa.
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Classifications of Anemias
Microcytic, Hypochromic• Iron deficiency
• Sideroblastic
• Chronic disease, Inflammation
• Lead poisoning
• Thalassemia trait
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Microcytic, Hypochromic
• Many RBCs smaller than
nucleus of normal
lymphocytes, increased central pallor.
• Iron deficiency, thalassemias, anemia of chronic disease.
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Classifications of Anemias
Normochromic• Hereditary Spherocytosis
• Hereditary Elliptocytosis
• PNH
• G6PD deficiency
• Aplastic anemia
• Acute blood loss
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Classifications of Anemias
Macrocytic• Vitamin B12 deficiency
• Folate deficiency
• Liver disease
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Macrocytic RBCs
• Most RBCs larger than nucleus of normal
lymphocytes, increased MCV.
• Folate or Vitamin B12 deficiencies, alcoholism, and liver disease.
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Reticulocytes
• Immature RBCs.
• Contain residual
ribosomal RNA.
• Reticulum stains blue using a supravital stain (new methylene blue).
• Counted and expressed as % of total red cells.
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LEUKOSIT
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Components of Blood
• Leukocytes (cont.)• White Blood Cell Count
• Normal 5-9 k WBC’s
• Leukopoiesis• Granulocytes
• Neutrophil
• Basophil
• Eosinophil
• Monocytes
• Lymphocytes
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MyelocyticMaturation Series
Myeloblast
Promyelocyte
Myelocyte
Metamyelocyte
Band Neutrophil
Segmented Neutrophil
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Leukocytes
• Five types.
• Size 8-20 microns.
• Involved in fighting infection, combatting allergic reactions, and immune responses.
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Components of Blood
• White Blood Cells (Leukocytes)• Margination
• Phagocytosis
The macrophage is using its internal
cytoskeleton to envelop cells of the fungus
Candida albicans.
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Components of Blood
• Leukocytes (cont.)• Immunity
• Subpopulation of lymphocytes known as T cells and B cells
• T cells develop cellular immunity.
• B cells produce humoral immunity
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Components of Blood
• Leukocytes (cont.)• Autoimmune disease
• May be specific or general
• Alterations in the immune process• Immunosuppression
• HIV
• Anti-rejection medication
• Chemotherapy/Cancer
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Components of Blood
• Inflammatory Process• MAST CELLS.
• Immunoglobulin E antibody IgE,
• Antigens• Antigens stick to the mast cell IgE
antibodies, causing granules in the mast cell to fire their contents into the surrounding tissue.
• This releases a host of inflammatory materials - leukotrienes, tumor necrosis factor, interleukin-4 and other cytokines that turn on other inflammatory cells.
• These materials cause fluid to leak from the capillaries and white cells including neutrophils, T cells and eosinophils to leave the circulation. The end result is a "local inflammatory response", a red, itchy welt.
Cellsalive.com
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Diseases of Leukocytes
• Leukopenia/Neutropenia• Too few white blood cells or neutrophils.
• Follow general treatment guidelines and provide supportive care.
• Leukocytosis• An increase in the number of circulating white blood
cells, often due to infection.• Leukemoid reaction
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Diseases of Leukocytes
• Leukemia• Cancer of hematopoietic cells
• Initial presentation• Acutely ill, fatigued, febrile and weak, anemic.
• Thrombocytopenia
• Often have a secondary infection.
• Management• Follow general treatment guidelines.
• Utilize isolation techniques to limit risk of infection.
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Diseases of Leukocytes
• Lymphomas• Cancers of the lymphatic system
• Hodgkin's
• Non-Hodgkins
• Presentation• Swelling of the lymph nodes
• Fever, night sweats, anorexia, weight loss, fatigue, and pruritis
• Management• Follow general treatment guidelines.
• Utilize isolation techniques to limit risk of infection.
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Toxic Granulation
• Increased basophilic granules
in neutrophils.
• Seen in severe infections, burns, malignancies, and pregnancy.
• Distinguish from basophils.
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Dohle Bodies
• Sky blue inclusions in cytoplasm of neutrophils.
• Seen in infections, burns, myleproliferative disorders, and pregnancy.
• Composed of RER and glycogen granules.
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TROMBOSIT
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Thrombocytes
• Smallest cells in the blood.
• Active role in coagulation and hemostasis.
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Components of Blood
• Platelets (Thrombocytes)• Megakaryocytes
• Thrombopoietin
• Thrombocytopenia
• Thrombocytosis
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Components of Blood
• Hemostasis- 3 mechanisms• Vascular spasm
• Contraction of tunica media
• Platelet plug• Platelet aggregation
• Coagulation• Formation of fibrin clot
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This scanning electron micrograph shows the fine structure of
a blood clot. Platelets released from the circulation and exposed
to the air use fibrinogen from the blood plasma to spin a mesh
of fibrin.
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Components of Blood
• Hemostasis (cont.)• Fibrinolysis
• Lysis of clot (plasmin)
• Thrombosis• Thrombolytics
• Medications affecting clot formation• Alter the enzyme
on the platelet.
• Affect the coagulation cascade.
• Enhance clotting.
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Coagulation Cascade - Synopsis
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Clotting Disorders
• Thrombocytosis and Thrombocytopenia• Thrombocytosis
• An abnormal increase in the number of platelets
• Thrombocytopenia• An abnormal decrease in the number of platelets
• Sequestration
• Destruction (ITP)
• Decreased production
• Management• Provide supportive care and follow general treatment
guidelines.
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Clotting Disorders
• Hemophilia• Deficiency or absence of a blood clotting factor
• Deficiency of factor VIII causes hemophilia A.
• Deficiency of factor IX causes hemophilia B.
• Deficiency is a sex-linked, inherited disorder.• Defective gene is carried on the X chromosome.
• Signs & Symptoms• Numerous bruises, deep muscle bleeding, and joint bleeding.
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Clotting Disorders
• Hemophilia (cont.)• Management
• Treat the patient similarly to others.• Administer supplemental oxygen.
• Establish IV access.
• Be alert for recurrent or prolonged bleeding, and prevent additional trauma.
• Von Willebrand’s Disease• Deficient component of factor VIII
• Generally results in excessive bleeding.
• Generally is not serious; provide supportive care.
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Clotting Disorders
• Disseminated Intravascular Coagulation• System activation of coagulation cascade.
• Results from sepsis, hypotension, OB complications, severe tissue or brain injury, cancer, and major hemolytic reactions.
• Multiple Myeloma• Cancerous disorder of plasma cells.
• Pathologic fractures are common.
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TERIMA KASIH
SELAMAT BELAJAR!