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Medical Laboratory Science · 500 Level
This is the complete lecture note for MLS 510 Medical Laboratory Haematology II, prepared for Medical Laboratory Science students at 500 Level. You can read it online below, open it in the full viewer, or download the PDF for offline study. It pairs with the course's video lectures, so you can read and watch together.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Course code: MLS 510 Course title: Medical Laboratory Haematology II Course credit load: 2 Units Series 1: Advanced Haematological Procedures And Anaemias • Part 1.1: Advanced Haematological Procedures • Sub-Part 1.1.1: Overview of advanced haematological techniques • Sub-Part 1.1.2: Specialised blood cell counts and morphology studies • Sub-Part 1.1.3: Advanced coagulation and bone marrow procedures • Sub-Part 1.1.4: Clinical applications of advanced haematological procedures • Part 1.2: Classification And Pathophysiology Of Anaemias • Sub-Part 1.2.1: Definition and general features of anaemia • Sub-Part 1.2.2: Morphological classification of anaemias • Sub-Part 1.2.3: Pathophysiological mechanisms of anaemia development • Sub-Part 1.2.4: Laboratory diagnosis of anaemias • Part 1.3: Clinical Significance And Case Studies In Anaemias • Sub-Part 1.3.1: Anaemias due to nutritional deficiencies (iron, vitamin B12, folate) • Sub-Part 1.3.2: Anaemias due to chronic disease and bone marrow failure • Sub-Part 1.3.3: Case examples and interpretation of laboratory findings • Sub-Part 1.3.4: Monitoring and management implications Introduction Haematology is a cornerstone of medical laboratory science, and advanced procedures provide clinicians with deeper insights into blood disorders and systemic health. Anaemia, one of the most common haematological conditions, affects millions worldwide and requires careful laboratory investigation to determine its cause and severity. By mastering advanced haematological procedures and understanding anaemias, learners are better equipped to contribute meaningfully to patient diagnosis and management.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS The aim of this Series is to introduce you to advanced haematological procedures and to equip you with the knowledge and skills needed to classify, diagnose, and interpret different types of anaemias in clinical practice. We shall commence this Series by exploring advanced haematological procedures, including specialised blood cell counts, morphology studies, and bone marrow techniques. Next, we will move on to the classification and pathophysiology of anaemias, examining their definitions, morphological categories, and mechanisms of development. Finally, we will wrap up by considering the clinical significance of anaemias, focusing on nutritional deficiencies, chronic disease, and bone marrow failure, supported by case studies and monitoring implications. Series Learning Outcomes Upon completing this Series, you should be able to: • SLO 1.1 describe advanced haematological techniques used in specialised laboratory practice, • SLO 1.2 demonstrate procedures for specialised blood cell counts and morphology studies, • SLO 1.3 explain advanced coagulation and bone marrow procedures, • SLO 1.4 analyse the clinical applications of advanced haematological procedures, • SLO 1.5 define anaemia and outline its general features, • SLO 1.6 classify anaemias based on morphological characteristics, • SLO 1.7 explain the pathophysiological mechanisms underlying anaemia development, • SLO 1.8 apply laboratory diagnostic methods to identify different types of anaemias, • SLO 1.9 describe anaemias resulting from nutritional deficiencies such as iron, vitamin B12, and folate, • SLO 1.10 evaluate anaemias associated with chronic disease and bone marrow failure, • SLO 1.11 interpret case examples of anaemia using laboratory findings, and • SLO 1.12 assess the monitoring and management implications of anaemia in clinical practice. 1.1 Advanced Haematological Procedures 1.1.1 Overview of advanced haematological techniques Advanced haematological techniques refer to specialised laboratory methods used to investigate blood disorders beyond routine tests. These include procedures for detailed cell counts, bone marrow examinations, and advanced coagulation studies. They provide clinicians with precise information about blood composition and function, which is essential for diagnosing complex conditions such as leukaemia, anaemia, and clotting disorders.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Fill in the blank: Advanced haematological techniques are specialised laboratory methods used to investigate ______ disorders beyond routine tests. Figure 1.1: Categories of advanced haematological techniques 1.1.2 Specialised blood cell counts and morphology studies Blood cell counts involve measuring the number of red blood cells, white blood cells, and platelets. Specialised counts may include reticulocyte counts, which assess bone marrow activity, and differential counts, which classify white blood cells into subtypes. Morphology studies examine the shape, size, and appearance of blood cells under the microscope, helping to identify abnormalities such as sickle cells or blasts in leukaemia. Fill in the blank: Reticulocyte counts are used to assess ______ activity.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Plate 1.1: Blood cell morphology studies 1.1.3 Advanced coagulation and bone marrow procedures Coagulation studies investigate the ability of blood to clot. Advanced tests include prothrombin time (PT), activated partial thromboplastin time (APTT), and thrombin time, which help diagnose bleeding disorders. Bone marrow procedures involve aspiration or biopsy to examine marrow cells directly. These procedures are crucial for diagnosing conditions such as aplastic anaemia, leukaemia, and myeloproliferative disorders. Fill in the blank: Bone marrow aspiration or biopsy is essential for diagnosing conditions such as ______.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Figure 1.2: Bone marrow procedures in haematology 1.1.4 Clinical applications of advanced haematological procedures The clinical value of advanced haematological procedures lies in their ability to provide accurate diagnoses and guide treatment. For example, morphology studies can detect leukaemic blasts, coagulation tests can identify haemophilia, and bone marrow biopsies can confirm aplastic anaemia. These procedures are therefore indispensable in modern haematology practice. Fill in the blank: Coagulation tests such as PT and APTT are used to diagnose ______ disorders. Procedure Clinical application Morphology studies Microscopic examination of blood cells; detects leukaemia, anaemia types, and other haematological abnormalities Coagulation tests Assess clotting pathways; diagnose haemophilia, thrombophilia, and other clotting disorders Bone marrow biopsy Provides direct evaluation of marrow; confirms marrow failure, aplastic anaemia, or malignancy such as leukaemia and lymphoma Box 1.1: Clinical applications of advanced haematological procedures Pilot questions 1.1 1. What are advanced haematological techniques used for? 2. What does a reticulocyte count assess? 3. Name two abnormalities detected in blood cell morphology studies.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS 4. Which tests are used to investigate blood clotting ability? 5. What condition can be confirmed by bone marrow biopsy? 1.2 Classification And Pathophysiology Of Anaemias 1.2.1 Definition and general features of anaemia Anaemia is defined as a condition in which the number of red blood cells or the concentration of haemoglobin is lower than normal, resulting in reduced oxygen delivery to tissues. General features include pallor, fatigue, shortness of breath, and dizziness. Laboratory findings typically show decreased haemoglobin levels, reduced haematocrit, and abnormal red cell indices. Fill in the blank: Anaemia is a condition characterised by reduced ______ delivery to tissues. Figure 1.3: General features of anaemia 1.2.2 Morphological classification of anaemias Anaemias can be classified based on morphology, which refers to the size and appearance of red blood cells. The three main categories are: • Microcytic anaemia: small red cells, often due to iron deficiency. • Normocytic anaemia: normal-sized red cells, often linked to chronic disease. • Macrocytic anaemia: large red cells, commonly associated with vitamin B12 or folate deficiency.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Fill in the blank: Anaemia with small red cells, often due to iron deficiency, is called ______ anaemia. Plate 1.2: Morphological classification of anaemias 1.2.3 Pathophysiological mechanisms of anaemia development Anaemia develops through several pathophysiological mechanisms: • Blood loss: acute or chronic bleeding reduces red cell mass. • Reduced red cell production: caused by nutritional deficiencies, bone marrow failure, or chronic disease. • Increased red cell destruction: known as haemolysis, which may be due to inherited or acquired conditions. Fill in the blank: Increased destruction of red blood cells is referred to as ______.
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