This document summarizes various types of anemias and hemorrhagic diseases. It discusses iron deficiency anemia, megaloblastic anemias caused by vitamin B12 or folate deficiencies, and thrombocytopenia which can result from reduced platelet production or increased platelet destruction. Specific conditions covered include pernicious anemia, autoimmune thrombocytopenic purpura, vitamin K deficiency, disseminated intravascular coagulation, and inherited bleeding disorders like hemophilia A, hemophilia B, and von Willebrand disease.
This document discusses various types of anemia, including iron deficiency anemia, megaloblastic anemia, pernicious anemia, hypolastic anemia, and haemolytic anemias. Iron deficiency anemia is the most common type worldwide, caused by a lack of iron intake. Megaloblastic anemia is caused by deficiencies in vitamin B12 or folic acid, which are needed to produce new red blood cells. Pernicious anemia specifically results from a vitamin B12 deficiency. Hypolastic anemia occurs when bone marrow is damaged and unable to produce red blood cells. Haemolytic anemias cause premature destruction of red blood cells. The document also briefly covers polycythaemia,
This document discusses erythrocyte and leukocyte disorders. It defines various types of anemia including iron deficiency anemia, megaloblastic anemia from B12/folic acid deficiency, aplastic anemia from bone marrow failure, and hemolytic anemias from premature red blood cell destruction. It also discusses polycythemia from an increased red blood cell count. For leukocytes, it defines leukopenia and leukocytosis and discusses neutropenia and various causes of decreased or increased white blood cell counts including leukemia.
Anemia, thalassemia and hemophilia in childrenNimmy Tomy
This document defines and discusses different types of anemia, including hemolytic anemia. It notes that anemia is a low red blood cell or hemoglobin level, reducing oxygen delivery. Causes include decreased or ineffective red blood cell production, increased red blood cell destruction (hemolytic anemia), and blood loss. Hemolytic anemia specifically refers to the premature breakdown of red blood cells, either inside or outside blood vessels. Causes can be genetic defects affecting red blood cells or acquired factors like immune system attacks or infections. Symptoms range from none in mild cases to fatigue, palpitations, and jaundice in more severe cases.
The document discusses iron deficiency anemia (IDA), including its definition, causes, signs and symptoms, classifications, treatment, nursing care, and complications. IDA is defined as anemia with biochemical evidence of iron deficiency, characterized by a low hemoglobin level and caused by blood loss, insufficient dietary iron intake, or impaired iron absorption. Common causes include heavy menstruation, ulcers, cancers, and dietary deficiencies. Treatment involves iron supplementation, vitamins, blood transfusions, and addressing the underlying cause. Nursing care focuses on managing fatigue, nutritional intake, and complications which can impact multiple organs if left untreated.
1. Hematologic disorders are those that produce quantitative or qualitative defects in blood cells or elements related to hemostasis.
2. Hematopoiesis begins in the yolk sac and liver in early gestation, then shifts to the bone marrow by mid-gestation, where it remains the primary site of blood cell production after birth.
3. Anemia is defined as a hemoglobin level below the reference level for age and sex, and can be caused by decreased production, increased destruction, or blood loss.
A condition in which the blood doesn't have enough healthy red blood cells.
Anaemia results from a lack of red blood cells or dysfunctional red blood cells in the body. This leads to reduced oxygen flow to the body's organs.
This document discusses different types of anaemia. It covers the composition of blood and defines anaemia. It describes signs and symptoms of anaemia and discusses causes such as reduced red blood cell production, increased destruction, or blood loss. The document classifies anaemias based on mean corpuscular volume and discusses specific types in more detail including iron deficiency, anaemia of chronic disease, thalassaemia, sickle cell anaemia, and autoimmune haemolytic anaemia. Treatment options are mentioned for some types.
This document discusses various types of anemia, including iron deficiency anemia, megaloblastic anemia, pernicious anemia, hypolastic anemia, and haemolytic anemias. Iron deficiency anemia is the most common type worldwide, caused by a lack of iron intake. Megaloblastic anemia is caused by deficiencies in vitamin B12 or folic acid, which are needed to produce new red blood cells. Pernicious anemia specifically results from a vitamin B12 deficiency. Hypolastic anemia occurs when bone marrow is damaged and unable to produce red blood cells. Haemolytic anemias cause premature destruction of red blood cells. The document also briefly covers polycythaemia,
This document discusses erythrocyte and leukocyte disorders. It defines various types of anemia including iron deficiency anemia, megaloblastic anemia from B12/folic acid deficiency, aplastic anemia from bone marrow failure, and hemolytic anemias from premature red blood cell destruction. It also discusses polycythemia from an increased red blood cell count. For leukocytes, it defines leukopenia and leukocytosis and discusses neutropenia and various causes of decreased or increased white blood cell counts including leukemia.
Anemia, thalassemia and hemophilia in childrenNimmy Tomy
This document defines and discusses different types of anemia, including hemolytic anemia. It notes that anemia is a low red blood cell or hemoglobin level, reducing oxygen delivery. Causes include decreased or ineffective red blood cell production, increased red blood cell destruction (hemolytic anemia), and blood loss. Hemolytic anemia specifically refers to the premature breakdown of red blood cells, either inside or outside blood vessels. Causes can be genetic defects affecting red blood cells or acquired factors like immune system attacks or infections. Symptoms range from none in mild cases to fatigue, palpitations, and jaundice in more severe cases.
The document discusses iron deficiency anemia (IDA), including its definition, causes, signs and symptoms, classifications, treatment, nursing care, and complications. IDA is defined as anemia with biochemical evidence of iron deficiency, characterized by a low hemoglobin level and caused by blood loss, insufficient dietary iron intake, or impaired iron absorption. Common causes include heavy menstruation, ulcers, cancers, and dietary deficiencies. Treatment involves iron supplementation, vitamins, blood transfusions, and addressing the underlying cause. Nursing care focuses on managing fatigue, nutritional intake, and complications which can impact multiple organs if left untreated.
1. Hematologic disorders are those that produce quantitative or qualitative defects in blood cells or elements related to hemostasis.
2. Hematopoiesis begins in the yolk sac and liver in early gestation, then shifts to the bone marrow by mid-gestation, where it remains the primary site of blood cell production after birth.
3. Anemia is defined as a hemoglobin level below the reference level for age and sex, and can be caused by decreased production, increased destruction, or blood loss.
A condition in which the blood doesn't have enough healthy red blood cells.
Anaemia results from a lack of red blood cells or dysfunctional red blood cells in the body. This leads to reduced oxygen flow to the body's organs.
This document discusses different types of anaemia. It covers the composition of blood and defines anaemia. It describes signs and symptoms of anaemia and discusses causes such as reduced red blood cell production, increased destruction, or blood loss. The document classifies anaemias based on mean corpuscular volume and discusses specific types in more detail including iron deficiency, anaemia of chronic disease, thalassaemia, sickle cell anaemia, and autoimmune haemolytic anaemia. Treatment options are mentioned for some types.
Sickle cell anemia is an inherited blood disorder where red blood cells become rigid and sticky and are shaped like sickles or crescents. This causes them to get stuck in small blood vessels and block blood flow, leading to pain crises. It is caused by a genetic mutation that results in abnormal hemoglobin called hemoglobin S. Symptoms include anemia, pain crises, swelling in hands and feet, and increased risk of infections. Complications can include stroke, organ damage, pulmonary hypertension, and blindness if untreated. Treatment focuses on pain management, antibiotics to prevent infection, hydroxyurea to reduce crises, blood transfusions, and potentially a bone marrow transplant for cure. Nursing care centers on managing pain
1. The document discusses various types of anemia including iron deficiency anemia, megaloblastic anemia, thalassemia, and aplastic anemia.
2. It provides definitions, causes, pathophysiology, clinical manifestations and management for each type.
3. The types are classified based on their etiology and morphology. Iron deficiency anemia is the most common type globally.
This document discusses anaemia, including its definition, causes, symptoms, classifications, and treatment. Anaemia is a blood disorder where there are low red blood cell counts or haemoglobin levels. It can be caused by blood loss, insufficient red blood cell production, or increased red blood cell destruction. Common types include iron deficiency, vitamin B12/folate deficiency, and chronic disease-related anaemia. Symptoms vary based on severity but can include fatigue, weakness, and shortness of breath. Treatment involves addressing the underlying cause, such as taking iron or B12 supplements. Anaemia is a widespread problem globally and in India, where nearly 50% of pregnant women are estimated to be anaemic.
The document discusses several types of blood disorders that can cause anemia or other issues. It describes red blood cell disorders like iron deficiency anemia, thalassemia, sickle cell anemia and glucose-6-phosphate dehydrogenase deficiency that can lead to hemolytic anemia. It also discusses anemia of chronic disease/inflammation and megaloblastic anemias caused by vitamin B12 or folate deficiencies that result in diminished red blood cell production. Malaria is summarized as a parasitic infection that can cause hemolytic anemia.
1. The document discusses hematologic disorders including hematopoiesis, anemia, polycythemia, and hematologic malignancy.
2. It provides details on the pathophysiology of hematopoiesis, the definition and classification of anemia, the general approach to evaluating anemic patients, and discussions of common anemia types and their treatments.
3. Key anemia types covered include iron deficiency anemia, megaloblastic anemia due to vitamin B12 and folate deficiencies, and the morphological features seen in peripheral blood and bone marrow in these conditions.
This document provides information on the components and functions of blood and urine, as well as abnormal conditions that can arise. It discusses the main components of blood including plasma, erythrocytes, leukocytes, and platelets. For each, it describes their composition and role, as well as pathological states like anemia, leukemia, thrombocytopenia. The document also outlines normal and abnormal constituents of urine and diseases they can indicate such as diabetes, kidney damage, and jaundice.
This document discusses the approach to diagnosing and classifying anemia. It defines anemia and notes that normal hemoglobin levels vary by age, gender, and race. A thorough history and physical exam can reveal potential causes like diet, blood loss, infections, or medications. Laboratory tests including a CBC, smear, and reticulocyte count help classify anemias as microcytic, normocytic, or macrocytic based on red blood cell size. Iron deficiency is a common cause of anemia in children. Hemolytic disorders cause shortened red blood cell survival.
This document provides an overview of diseases of the blood, including various types of anemias and disorders of hemostasis. It discusses topics like hematopoiesis, iron deficiency anemia, sickle cell disease, thalassemia, immune thrombocytopenic purpura, and hemophilia. For each condition, it outlines causes, clinical features, laboratory findings, diagnosis, and treatment approaches. The document thus serves as a comprehensive reference for pediatricians on blood disorders commonly encountered in clinical practice.
This document provides an overview of anemia, including its classification, diagnosis, clinically significant variants, and treatment with drug therapy. It discusses the morphological, etiological, and quantitative classification of anemia. The clinically significant variants covered are iron deficiency anemia, pernicious anemia, megaloblastic anemia, sickle cell anemia, thalassemia, and aplastic anemia. It also outlines the diagnosis of anemia through laboratory tests and symptoms. The treatment section focuses on drug therapy for iron deficiency anemia, including oral and parenteral iron supplementation, and managing iron overload and B12/folate deficiencies.
Anaemia is common in developing countries and a major complication in pregnancy. It is defined as a reduction in oxygen-carrying capacity of blood caused by decreased red blood cell production or haemoglobin levels. In pregnancy, anaemia is mainly caused by iron deficiency due to increased demands. It can cause signs like fatigue, breathlessness and palpitations. Effects include risks to both mother like postpartum haemorrhage and baby like intrauterine growth restriction. Treatment involves iron, folic acid and blood transfusions. Prevention focuses on nutrition, malaria prophylaxis, deworming and treating infections.
This document discusses various types of anemia. It defines anemia as a reduction in hemoglobin levels and describes the most common causes as iron deficiency and nutritional deficiencies. Specific types discussed in detail include iron deficiency anemia, megaloblastic anemia caused by vitamin B12 and folate deficiencies, sickle cell anemia caused by an abnormal hemoglobin gene, thalassemias caused by genetic defects in hemoglobin production, and G6PD deficiency which affects the ability to prevent oxidative damage to red blood cells. The document covers epidemiology, pathophysiology, clinical manifestations, investigations, and treatments for each type.
This document discusses the pathophysiology of various hematological disorders including erythrocyte, leukocyte, and platelet disorders. It covers anemias caused by impaired red blood cell production or increased destruction. It also discusses leukopenia, leukocytosis, leukemia, polycythemia, and thrombocytopenia. The causes, signs, symptoms, and treatments of these disorders are described in detail over multiple paragraphs.
The document discusses different types of anemia including iron deficiency, vitamin B12 and folate deficiency, chronic disease, and hemolytic anemias. It provides definitions, causes, signs and symptoms, diagnostic evaluations, and medical and nursing management approaches for various forms of anemia. The nursing management focuses on assessing and addressing fatigue, maintaining adequate nutrition and tissue perfusion, and monitoring for complications related to anemia.
This document discusses different types of anemia. It begins by introducing the three main blood cell groups - red blood cells, white blood cells, and platelets. It then focuses on red blood cells and hemoglobin, the oxygen-carrying molecule. The document defines anemia and provides reference levels for hemoglobin. It describes different types of anemia classified by mean corpuscular volume (MCV), including microcytic (low MCV), normocytic (normal MCV), and macrocytic (high MCV) anemias. Microcytic anemias discussed in more detail include iron deficiency anemia, thalassemia, and sideroblastic anemia. Macrocytic anemias are
Megaloblastic anaemia (lecture for v year mbbs)mona aziz
Megaloblastic anemia results from vitamin B12 or folic acid deficiency. It causes impaired DNA synthesis and nucleocytoplasmic asynchrony in proliferating cells. Deficiencies in vitamin B12 or folic acid lead to elevated homocysteine and impaired conversion of uracil to thymidine, arresting cell development. This causes megaloblastic changes notably in the bone marrow and gastrointestinal tract. Neurological changes in B12 deficiency are due to demyelination. Investigations show macrocytic anemia and megaloblastic bone marrow changes. Treatment involves vitamin B12 injections and oral folic acid supplementation.
This document provides an overview of blood disorders, including red blood cell, white blood cell, and platelet disorders as well as coagulation disorders. It discusses specific disorders such as polycythemia vera, anemia, sickle cell anemia, thalassemia, and erythroblastosis fetalis. For each disorder it covers pathogenesis, clinical manifestations, oral manifestations, laboratory findings, and treatment considerations.
Over pressure layer chromatography (OPLC) is a forced flow technique suitable for partially purified samples of 50-100 mg. It has higher efficiency and increased solute loading capacity compared to thin layer chromatography (TLC) due to a sorbent layer covered by an elastic membrane under external pressure, forming a closed system through which the mobile phase is pumped. The chromatographic plate is sealed and components are eluted and collected through a detector and fraction collector. OPLC provides more efficient and flexible separations than TLC or column liquid chromatography on analytical and preparative scales, with resolution and reproducibility better than comparable techniques.
This document discusses the process of HPTLC development and evaluation. It describes how placing an HPTLC plate in a saturated developing chamber results in four competing processes: 1) establishment of vapor phase equilibrium, 2) adsorption of gas phase molecules onto the stationary phase, 3) interaction of wetted layer with gas phase, and 4) separation of mobile phase components by the stationary phase. It also explains how chamber saturation, preconditioning, and sandwich configurations can affect these processes and the resulting chromatogram. Quantitative evaluation is performed through densitometric analysis and comparison of peak data from unknown samples to calibration standards run on the same plate.
Sickle cell anemia is an inherited blood disorder where red blood cells become rigid and sticky and are shaped like sickles or crescents. This causes them to get stuck in small blood vessels and block blood flow, leading to pain crises. It is caused by a genetic mutation that results in abnormal hemoglobin called hemoglobin S. Symptoms include anemia, pain crises, swelling in hands and feet, and increased risk of infections. Complications can include stroke, organ damage, pulmonary hypertension, and blindness if untreated. Treatment focuses on pain management, antibiotics to prevent infection, hydroxyurea to reduce crises, blood transfusions, and potentially a bone marrow transplant for cure. Nursing care centers on managing pain
1. The document discusses various types of anemia including iron deficiency anemia, megaloblastic anemia, thalassemia, and aplastic anemia.
2. It provides definitions, causes, pathophysiology, clinical manifestations and management for each type.
3. The types are classified based on their etiology and morphology. Iron deficiency anemia is the most common type globally.
This document discusses anaemia, including its definition, causes, symptoms, classifications, and treatment. Anaemia is a blood disorder where there are low red blood cell counts or haemoglobin levels. It can be caused by blood loss, insufficient red blood cell production, or increased red blood cell destruction. Common types include iron deficiency, vitamin B12/folate deficiency, and chronic disease-related anaemia. Symptoms vary based on severity but can include fatigue, weakness, and shortness of breath. Treatment involves addressing the underlying cause, such as taking iron or B12 supplements. Anaemia is a widespread problem globally and in India, where nearly 50% of pregnant women are estimated to be anaemic.
The document discusses several types of blood disorders that can cause anemia or other issues. It describes red blood cell disorders like iron deficiency anemia, thalassemia, sickle cell anemia and glucose-6-phosphate dehydrogenase deficiency that can lead to hemolytic anemia. It also discusses anemia of chronic disease/inflammation and megaloblastic anemias caused by vitamin B12 or folate deficiencies that result in diminished red blood cell production. Malaria is summarized as a parasitic infection that can cause hemolytic anemia.
1. The document discusses hematologic disorders including hematopoiesis, anemia, polycythemia, and hematologic malignancy.
2. It provides details on the pathophysiology of hematopoiesis, the definition and classification of anemia, the general approach to evaluating anemic patients, and discussions of common anemia types and their treatments.
3. Key anemia types covered include iron deficiency anemia, megaloblastic anemia due to vitamin B12 and folate deficiencies, and the morphological features seen in peripheral blood and bone marrow in these conditions.
This document provides information on the components and functions of blood and urine, as well as abnormal conditions that can arise. It discusses the main components of blood including plasma, erythrocytes, leukocytes, and platelets. For each, it describes their composition and role, as well as pathological states like anemia, leukemia, thrombocytopenia. The document also outlines normal and abnormal constituents of urine and diseases they can indicate such as diabetes, kidney damage, and jaundice.
This document discusses the approach to diagnosing and classifying anemia. It defines anemia and notes that normal hemoglobin levels vary by age, gender, and race. A thorough history and physical exam can reveal potential causes like diet, blood loss, infections, or medications. Laboratory tests including a CBC, smear, and reticulocyte count help classify anemias as microcytic, normocytic, or macrocytic based on red blood cell size. Iron deficiency is a common cause of anemia in children. Hemolytic disorders cause shortened red blood cell survival.
This document provides an overview of diseases of the blood, including various types of anemias and disorders of hemostasis. It discusses topics like hematopoiesis, iron deficiency anemia, sickle cell disease, thalassemia, immune thrombocytopenic purpura, and hemophilia. For each condition, it outlines causes, clinical features, laboratory findings, diagnosis, and treatment approaches. The document thus serves as a comprehensive reference for pediatricians on blood disorders commonly encountered in clinical practice.
This document provides an overview of anemia, including its classification, diagnosis, clinically significant variants, and treatment with drug therapy. It discusses the morphological, etiological, and quantitative classification of anemia. The clinically significant variants covered are iron deficiency anemia, pernicious anemia, megaloblastic anemia, sickle cell anemia, thalassemia, and aplastic anemia. It also outlines the diagnosis of anemia through laboratory tests and symptoms. The treatment section focuses on drug therapy for iron deficiency anemia, including oral and parenteral iron supplementation, and managing iron overload and B12/folate deficiencies.
Anaemia is common in developing countries and a major complication in pregnancy. It is defined as a reduction in oxygen-carrying capacity of blood caused by decreased red blood cell production or haemoglobin levels. In pregnancy, anaemia is mainly caused by iron deficiency due to increased demands. It can cause signs like fatigue, breathlessness and palpitations. Effects include risks to both mother like postpartum haemorrhage and baby like intrauterine growth restriction. Treatment involves iron, folic acid and blood transfusions. Prevention focuses on nutrition, malaria prophylaxis, deworming and treating infections.
This document discusses various types of anemia. It defines anemia as a reduction in hemoglobin levels and describes the most common causes as iron deficiency and nutritional deficiencies. Specific types discussed in detail include iron deficiency anemia, megaloblastic anemia caused by vitamin B12 and folate deficiencies, sickle cell anemia caused by an abnormal hemoglobin gene, thalassemias caused by genetic defects in hemoglobin production, and G6PD deficiency which affects the ability to prevent oxidative damage to red blood cells. The document covers epidemiology, pathophysiology, clinical manifestations, investigations, and treatments for each type.
This document discusses the pathophysiology of various hematological disorders including erythrocyte, leukocyte, and platelet disorders. It covers anemias caused by impaired red blood cell production or increased destruction. It also discusses leukopenia, leukocytosis, leukemia, polycythemia, and thrombocytopenia. The causes, signs, symptoms, and treatments of these disorders are described in detail over multiple paragraphs.
The document discusses different types of anemia including iron deficiency, vitamin B12 and folate deficiency, chronic disease, and hemolytic anemias. It provides definitions, causes, signs and symptoms, diagnostic evaluations, and medical and nursing management approaches for various forms of anemia. The nursing management focuses on assessing and addressing fatigue, maintaining adequate nutrition and tissue perfusion, and monitoring for complications related to anemia.
This document discusses different types of anemia. It begins by introducing the three main blood cell groups - red blood cells, white blood cells, and platelets. It then focuses on red blood cells and hemoglobin, the oxygen-carrying molecule. The document defines anemia and provides reference levels for hemoglobin. It describes different types of anemia classified by mean corpuscular volume (MCV), including microcytic (low MCV), normocytic (normal MCV), and macrocytic (high MCV) anemias. Microcytic anemias discussed in more detail include iron deficiency anemia, thalassemia, and sideroblastic anemia. Macrocytic anemias are
Megaloblastic anaemia (lecture for v year mbbs)mona aziz
Megaloblastic anemia results from vitamin B12 or folic acid deficiency. It causes impaired DNA synthesis and nucleocytoplasmic asynchrony in proliferating cells. Deficiencies in vitamin B12 or folic acid lead to elevated homocysteine and impaired conversion of uracil to thymidine, arresting cell development. This causes megaloblastic changes notably in the bone marrow and gastrointestinal tract. Neurological changes in B12 deficiency are due to demyelination. Investigations show macrocytic anemia and megaloblastic bone marrow changes. Treatment involves vitamin B12 injections and oral folic acid supplementation.
This document provides an overview of blood disorders, including red blood cell, white blood cell, and platelet disorders as well as coagulation disorders. It discusses specific disorders such as polycythemia vera, anemia, sickle cell anemia, thalassemia, and erythroblastosis fetalis. For each disorder it covers pathogenesis, clinical manifestations, oral manifestations, laboratory findings, and treatment considerations.
Similar to Anaemias and hemorrhagic diseases.pptx (20)
Over pressure layer chromatography (OPLC) is a forced flow technique suitable for partially purified samples of 50-100 mg. It has higher efficiency and increased solute loading capacity compared to thin layer chromatography (TLC) due to a sorbent layer covered by an elastic membrane under external pressure, forming a closed system through which the mobile phase is pumped. The chromatographic plate is sealed and components are eluted and collected through a detector and fraction collector. OPLC provides more efficient and flexible separations than TLC or column liquid chromatography on analytical and preparative scales, with resolution and reproducibility better than comparable techniques.
This document discusses the process of HPTLC development and evaluation. It describes how placing an HPTLC plate in a saturated developing chamber results in four competing processes: 1) establishment of vapor phase equilibrium, 2) adsorption of gas phase molecules onto the stationary phase, 3) interaction of wetted layer with gas phase, and 4) separation of mobile phase components by the stationary phase. It also explains how chamber saturation, preconditioning, and sandwich configurations can affect these processes and the resulting chromatogram. Quantitative evaluation is performed through densitometric analysis and comparison of peak data from unknown samples to calibration standards run on the same plate.
1. HPTLC involves applying samples and standards as spots or bands on a chromatography layer, developing the layer to separate analytes, and detecting spots. Key steps include sample preparation, selecting an adsorbent, prewashing and preconditioning the layer.
2. HPTLC provides flexibility in chromatography layers, sample application techniques, development conditions, and detection methods to optimize separations for different applications. Automatic instruments aid in reproducible sample application and development.
3. Derivatization and multiple detection techniques allow visualization and quantification of analytes. Scanning and imaging software facilitate quantitative evaluation of chromatograms.
This document discusses the advantages and process of Thin Layer Chromatography (TLC). TLC is a flexible and cost-effective separation technique that can be used alongside HPLC and GC. It allows for the parallel separation and visual evaluation of multiple samples through a simple sample preparation process. The key stages of TLC are sample application, development, visualization, and interpretation of results by calculating retention factors. Different stationary phases like silica gel, cellulose, and alumina can be used depending on the type of compounds being separated. Two-dimensional TLC involves developing the sample in two perpendicular directions with different mobile phases.
HPLC uses high pressure to push a mobile phase through a stationary phase column, allowing for separation and quantification of complex mixtures. It provides higher resolution than TLC. HPLC uses a 3D column rather than a 2D plate. It also allows for on-line detection using variable UV/Vis detectors and produces peaks rather than spots. The mobile phase is pumped through the system using high pressure rather than capillary action.
Column chromatography is a method used to separate mixtures based on differences in how components partition between a stationary and mobile phase. Components travel down an absorptive column at different rates based on their affinity for the stationary phase, with those having less affinity eluting first. Key factors that affect separation include the stationary phase properties like particle size, the mobile phase used and flow rate, and column dimensions and temperature. Common stationary phases are silica gel and alumina, while mobile phases vary in polarity. Separated components can be detected visually or using instruments like UV/Vis detectors. Column chromatography has applications in purification, isolation, and analysis across various fields.
This document discusses the morphology and modifications of plant stems. It describes the basic structure of stems and their functions of transport, storage, and vegetative propagation. Various stem modifications are outlined for different purposes like food storage (tubers, bulbs, corms), support (tendrils), protection (thorns), and climbing. Aerial modifications include climbers, phylloclades, cladodes, and thorns. Underground modifications are bulbs, corms, rhizomes, and tubers. The document also discusses stem branching patterns.
This document discusses the morphology and types of root systems in flowering plants. It describes the three main root systems - tap root system, fibrous root system, and adventitious root system. The regions of the root are also outlined, including the root cap, region of meristematic activity, region of elongation, and region of maturation. Modifications and forms of roots are covered, such as prop roots, stilt roots, and pneumatophores for support and respiration, as well as fusiform, napiform, conical, and tuberous roots for food storage.
The document summarizes the key differences between three types of plant tissues: parenchyma, collenchyma, and sclerenchyma.
Parenchyma cells are living cells found in soft plant parts with thin, uniformly thick cell walls. Collenchyma cells are also living and found in young stems and petioles, with unevenly thickened cell walls. Sclerenchyma cells are dead with thick, lignified cell walls found in woody and hardened parts.
The document also compares xylem and phloem tissues, noting that xylem transports water and minerals unidirectionally upward, while phloem transports sugars bidirectionally using sieve tubes and companion
The Plant Kingdom is characterized by autotrophic organisms that produce their own food, have cell walls, chloroplasts, and vascular tissue. Plants are classified based on their plant body, vascular system, and seed formation. The divisions include cryptogams (non-flowering) such as algae, fungi, lichens, bryophytes, and pteridophytes, as well as phanerogams (seed-bearing) such as gymnosperms and angiosperms. Angiosperms are further divided into monocots and dicots.
- Muscle contraction occurs via the sliding filament theory where actin filaments slide past myosin filaments, causing sarcomeres and muscles to shorten.
- Sarcomeres contain regularly arranged thick and thin filaments that generate striations visible under a microscope. Contraction is driven by myosin cross-bridges binding to actin and generating a power stroke via ATP hydrolysis.
- Calcium binds to troponin and causes it to shift tropomyosin, unblocking the myosin binding sites on actin and allowing cross-bridge cycling and contraction to occur.
Atherosclerosis is a disease where plaque builds up in the arteries. It happens over many years in stages: initially fatty streaks form from cholesterol accumulation under the artery wall, then plaque grows larger restricting blood flow. Eventually the plaque can rupture, causing blood clots that block arteries and lead to heart attack or stroke. Risk factors include high blood pressure, cholesterol, diabetes and smoking. Doctors use tests like angiograms and ultrasounds to diagnose and stage atherosclerosis. Treatment focuses on lifestyle changes and medications to control risks and open blocked arteries.
Inflammatory joint diseases can affect the joints in different ways. There are several types of arthritis that cause joint pain and swelling over time, including osteoarthritis, the most common type, and gout, which causes intense pain from uric acid crystals building up in the joints. Autoimmune diseases like lupus and Sjögren's syndrome can also cause joint inflammation and pain by attacking the body's own tissues. Sudden injuries can result in sprains, strains, or dislocated joints, while overuse can lead to conditions such as bursitis, tendinitis, or chronic strain.
This document discusses the major systems of biological classification that have been proposed over time. It begins by outlining Linnaeus' original two kingdom system (plants and animals), followed by Haeckel's three kingdom system (adding protists), Copeland's four kingdom system (splitting protists and adding monera), and Whittaker's influential five kingdom system (monera, protista, fungi, plants, animals). It then provides characteristics of each kingdom in Whittaker's five kingdom system and compares their key attributes.
This document discusses the key characteristics of living things, including nutrition, respiration, movement, excretion, growth, reproduction, and sensitivity. It also describes the hierarchical classification system used to classify organisms into kingdoms, phyla, classes, orders, families, genera and species based on their evolutionary relationships and homologous structures. The document contrasts natural classification based on evolutionary relationships with artificial classification, and explains Carl Linnaeus' binomial system of scientific naming which assigns each species a two-part Latin name based on its genus and species.
The kidneys filter around 150-180 liters of blood plasma daily but only produce 1-1.8 liters of urine by reabsorbing the rest. Urine contains waste products and is usually yellow and slightly acidic. Micturition is the process of emptying the bladder in two phases - storage and voiding. During storage, the bladder relaxes and fills while sphincters contract to prevent leakage. During voiding, the bladder contracts while sphincters relax to allow urine passage. Nervous system control and any lesions impact the phases' coordination.
Structure and function of different parts of nephron.pptxSunaynaChoudhary
The nephron is the functional unit of the kidney that filters blood to form urine. It consists of a renal corpuscle containing the glomerulus for blood filtration and a renal tubule for reabsorption and secretion. The renal tubule is divided into three sections - the proximal convoluted tubule, the loop of Henle, and the distal convoluted tubule. The proximal convoluted tubule reabsorbs most water, salts and nutrients from the filtrate using active transport mechanisms like sodium-glucose cotransporters. This creates gradients driving passive reabsorption of water down its concentration gradient through the tubule epithelial cells and into the bloodstream.
The document summarizes the structure and function of the urinary system. It describes how the kidneys filter waste from the bloodstream and regulate fluid and electrolyte balance through millions of nephrons. Urine is transported from the kidneys to the bladder via ureters. The bladder stores urine temporarily before it is emptied through the urethra. Together, these organs work to eliminate waste from the body while maintaining homeostasis.
Hemostasis is the process by which bleeding is stopped through a complex cascade of interlinked steps, culminating in the formation of a blood clot. This involves initial platelet aggregation and vasoconstriction to form a temporary plug, followed by activation of coagulation factors that trigger the production of fibrin strands surrounding the platelet plug to form a stable clot. Precise control of coagulation prevents blood loss from injury while maintaining blood fluidity throughout the uninjured circulatory system.
Haemopoiesis, RBC’s, erythropoiesis, life span, oxygen transport.pptxSunaynaChoudhary
The document summarizes key aspects of haematopoiesis and erythropoiesis. It discusses how blood cells are formed from stem cells in the bone marrow, and the development and maturation of red blood cells. It also describes the structure and function of hemoglobin in transporting oxygen, factors regulating erythropoiesis including erythropoietin, and the lifespan and breakdown of red blood cells.
TEST BANK For Community Health Nursing A Canadian Perspective, 5th Edition by...Donc Test
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ABDOMINAL TRAUMA in pediatrics part one.drhasanrajab
Abdominal trauma in pediatrics refers to injuries or damage to the abdominal organs in children. It can occur due to various causes such as falls, motor vehicle accidents, sports-related injuries, and physical abuse. Children are more vulnerable to abdominal trauma due to their unique anatomical and physiological characteristics. Signs and symptoms include abdominal pain, tenderness, distension, vomiting, and signs of shock. Diagnosis involves physical examination, imaging studies, and laboratory tests. Management depends on the severity and may involve conservative treatment or surgical intervention. Prevention is crucial in reducing the incidence of abdominal trauma in children.
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Explore the benefits of combining Ayurveda with conventional Parkinson's treatments. Learn how a holistic approach can manage symptoms, enhance well-being, and balance body energies. Discover the steps to safely integrate Ayurvedic practices into your Parkinson’s care plan, including expert guidance on diet, herbal remedies, and lifestyle modifications.
Cell Therapy Expansion and Challenges in Autoimmune DiseaseHealth Advances
There is increasing confidence that cell therapies will soon play a role in the treatment of autoimmune disorders, but the extent of this impact remains to be seen. Early readouts on autologous CAR-Ts in lupus are encouraging, but manufacturing and cost limitations are likely to restrict access to highly refractory patients. Allogeneic CAR-Ts have the potential to broaden access to earlier lines of treatment due to their inherent cost benefits, however they will need to demonstrate comparable or improved efficacy to established modalities.
In addition to infrastructure and capacity constraints, CAR-Ts face a very different risk-benefit dynamic in autoimmune compared to oncology, highlighting the need for tolerable therapies with low adverse event risk. CAR-NK and Treg-based therapies are also being developed in certain autoimmune disorders and may demonstrate favorable safety profiles. Several novel non-cell therapies such as bispecific antibodies, nanobodies, and RNAi drugs, may also offer future alternative competitive solutions with variable value propositions.
Widespread adoption of cell therapies will not only require strong efficacy and safety data, but also adapted pricing and access strategies. At oncology-based price points, CAR-Ts are unlikely to achieve broad market access in autoimmune disorders, with eligible patient populations that are potentially orders of magnitude greater than the number of currently addressable cancer patients. Developers have made strides towards reducing cell therapy COGS while improving manufacturing efficiency, but payors will inevitably restrict access until more sustainable pricing is achieved.
Despite these headwinds, industry leaders and investors remain confident that cell therapies are poised to address significant unmet need in patients suffering from autoimmune disorders. However, the extent of this impact on the treatment landscape remains to be seen, as the industry rapidly approaches an inflection point.
Osteoporosis - Definition , Evaluation and Management .pdfJim Jacob Roy
Osteoporosis is an increasing cause of morbidity among the elderly.
In this document , a brief outline of osteoporosis is given , including the risk factors of osteoporosis fractures , the indications for testing bone mineral density and the management of osteoporosis
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2. ANAEMIAS
• In anaemia, there is not enough haemoglobin available to carry sufficient oxygen from
the lungs to supply the needs of the tissues.
• It occurs when the rate of production of mature cells entering the blood from the red
bone marrow does not keep pace with the rate of haemolysis.
• The classification of anaemia is based on the cause:
Impaired Erythrocyte Production
• – Iron Deficiency
• – Megaloblastic Anaemias
• – Hypoplastic Anaemia
Increased Erythrocyte Loss
• – Haemolytic Anaemias
• – Normocytic Anaemia.
• Anaemia can cause abnormal changes in red cell size or colour, detectable
microscopically.
3. IRON DEFICIENCY ANAEMIA
• Most common form of anaemia.
• Normal daily requirement of iron intake in men is about 1 to 2 mg.
• The normal daily requirement in women is 3 mg because of blood loss during
menstruation and to meet the needs of the growing fetus during pregnancy.
• The amount of haemoglobin in each cell is regarded as below normal when the MCHC
(mean corpuscular haemoglobin concentration) is less than 27 pg/cell.
• The anaemia is regarded as severe when the haemoglobin level is below 9 g/dl blood.
• It is caused by deficiency of iron in the bone marrow and may be due to dietary deficiency,
excessively high requirements or malabsorption.
• In this type of anaemia erythrocytes are microcytic and hypochromic because their
haemoglobin content is low.
• Iron deficiency anaemia can result from
deficient intake,
unusually high iron requirements,
or poor absorption from the alimentary tract.
4. DEFICIENT INTAKE
• Because of the relative inefficiency of iron absorption, deficiency occurs frequently, even
in individuals whose requirements are normal.
• The risk of deficiency increases if the daily diet is restricted in some way, as in poorly
planned vegetarian diets, or in weight-reducing diets where the range of foods eaten is
small.
• Babies dependent on milk may also suffer mild iron deficiency anaemia if weaning on to
a mixed diet is delayed much past the first year, since the liver carries only a few months’
store and milk is a poor source of iron.
HIGH REQUIREMENTS
• In pregnancy, iron requirements are increased both for fetal growth and to support the
additional load on the mother’s cardiovascular system.
• Iron requirements also rise when there is chronic blood loss, the causes of which include
peptic ulcers, heavy menstrual bleeding (menorrhagia), haemorrhoids or carcinoma of
the GI tract.
5. MALABSORPTION
• Iron absorption is usually increased following haemorrhage, but may be reduced in
abnormalities of the stomach, duodenum or jejunum.
Because iron absorption is dependent on an acid environment in the stomach, an
increase in gastric pH may reduce it.
This may follow removal of part of the stomach,
or in pernicious anaemia, where the acid-releasing (parietal) cells of the stomach are
destroyed.
Loss of surface area for absorption in the intestine, e.g. after surgical removal, can
also cause deficiency.
6. MEGALOBLASTIC ANAEMIAS
• Deficiency of vitamin B12 and/or folic acid impairs erythrocyte maturation and
abnormally large erythrocytes (megaloblasts) are found in the blood.
• During normal erythropoiesis, several cell divisions occur and the daughter cells at each
stage are smaller than the parent cell because there is not much time for cell
enlargement between divisions.
• When deficiency of vitamin B12 and/or folic acid occurs, the rate of DNA and RNA
synthesis is reduced, delaying cell division.
• The cells can therefore grow larger than normal between divisions.
• Circulating cells are immature, larger than normal and some are nucleated (MCV > 94
fl).
• The haemoglobin content of each cell is normal or raised.
• The cells are fragile and their life span is reduced to between 40 and 50 days.
• Depressed production and early lysis cause anaemia.
7. VITAMIN B12 DEFICIENCY ANAEMIA
PERNICIOUS ANAEMIA
• This is the most common form of vitamin B12 deficiency anaemia.
• It is commonest in females usually between 45 and 65 years of age.
• It is an autoimmune disease in which autoantibodies destroy intrinsic factor (IF) and parietal
cells in the stomach.
DIETARY DEFICIENCY OF VITAMIN B12
• This is rare, except in true vegans, i.e. when no animal products are included in the diet.
• The store of vitamin B12 is such that deficiency takes several years to appear.
• Other causes of vitamin B12 deficiency include-
Gastrectomy (removal of all or part or the stomach) – This leaves fewer cells available to
produce IF.
Chronic gastritis, malignant disease and ionising radiation – These damage the gastric
mucosa including the parietal cells that produce IF.
Malabsorption – If the terminal ileum is removed or inflamed, e.g. in Crohn’s disease, the
vitamin cannot be absorbed.
8. HAEMORRHAGIC DISEASES
• THROMBOCYTOPENIA- This is defined as a blood platelet count below
150 × 109/l (150000/mm3), but spontaneous capillary bleeding does not usually occur
unless the count falls below 30 × 109/l (30000/mm3).
• It may be due to a reduced rate of platelet production or an increased rate of destruction.
Reduced platelet production
• This is usually due to bone marrow deficiencies, and therefore the production of
erythrocytes and leukocytes is also reduced, giving rise to pancytopenia (shortage of all
three cellular components of the blood).
• It is often due to:
1. platelets being crowded out of the bone marrow in bone marrow diseases, e.g.
leukemias, pernicious anaemia, malignant tumours
2. ionising radiation, e.g. X-rays or radioactive isotopes, which damage the rapidly dividing
precursor cells in the bone marrow
3. drugs that can damage bone marrow, e.g. cytotoxic drugs, chloramphenicol,
chlorpromazine, sulphonamides.
9. Increased platelet destruction
• A reduced platelet count occurs when the production of new platelets does not keep pace
with the destruction of damaged and worn-out ones.
• This occurs in disseminated intravascular coagulation (DIC, a serious disorder in which
the proteins that control blood clotting become overactive) and autoimmune
thrombocytopenic purpura.
Autoimmune thrombocytopenic purpura
• This condition, which usually affects children and young adults, may be triggered by a viral
infection such as measles.
• Antiplatelet antibodies are formed that coat platelets, leading to platelet destruction and
their removal from circulation.
• A significant feature of this disease is the presence of purpura, which are haemorrhages
into the skin ranging in size from pinpoints to large blotches.
• The severity of the disease varies from mild bleeding into the skin to severe haemorrhage.
• When the platelet count is very low there may be severe bruising, haematuria,
gastrointestinal or intracranial haemorrhages.
10. VITAMIN K DEFICIENCY
• Vitamin K is required by the liver for the synthesis of many clotting factors, and therefore
deficiency predisposes to abnormal clotting.
Haemorrhagic disease of the newborn
• Spontaneous haemorrhage from the umbilical cord and intestinal mucosa occurs in babies
when the stored vitamin K obtained from the mother before birth has been used up and the
intestinal bacteria needed for its synthesis in the infant’s bowel are not yet established.
• This is most likely to occur when the baby is premature.
Deficiency in adults
• Vitamin K is fat-soluble, and bile salts are required in the colon for its absorption.
• Deficiency may occur when there is liver disease, prolonged obstruction to the biliary tract,
or in any other illness where fat absorption is impaired, e.g. coeliac disease.
• Dietary deficiency is rare because a sufficient supply of vitamin K is usually synthesized in
the intestine by bacterial action.
• However, it may occur during treatment with drugs that sterilise the bowel.
11. DISSEMINATED INTRAVASCULAR COAGULATION
(DIC)
• In DIC, the coagulation system is activated within blood vessels, leading to formation of
intravascular clots and deposition of fibrin in the tissues.
• Because of this consumption of clotting factors and platelets, there is a consequent
tendency to haemorrhage.
• DIC is a common complication of a number of other disorders, including:
Severe shock, especially when due to microbial infection
Septicaemia, when endotoxins are released by gram-negative bacteria
Severe traumas
Premature separation of placenta when amniotic fluid enters maternal blood
Acute pancreatitis when digestive enzymes are released into the blood
Malignant tumours with widely dispersed metastases.
12. CONGENITAL DISORDERS
Haemophilias
• The haemophilias are a group of inherited clotting disorders, carried by genes present on
the X-chromosome (i.e. inheritance is sex linked).
• The faulty genes code for abnormal clotting factors (Factor VIII and Christmas factor),
and if inherited by a male child always leads to expression of the disease.
• Women inheriting one copy are carriers, but, provided their second X chromosome bears
a copy of the normal gene, their blood clotting is normal.
• It is possible, but unusual, for a woman to inherit two copies of the abnormal gene and
have haemophilia.
• Those who have haemophilia experience repeated episodes of severe and prolonged
bleeding at any site, with little evidence of trauma.
• Recurrent bleeding into joints is common, causing severe pain and, in the long term,
cartilage is damaged.
13. CONTD….
• The two main forms of haemophilia are-
Haemophilia A- In this disease, factor VIII is abnormal and is less
biologically active.
Haemophilia B (Christmas disease)- This is less common and factor IX is
deficient, resulting in deficiency of thromboplastin (clotting factor III).
von Willebrand’s disease
• In this disease, a deficiency in the von Willebrand factor causes low
levels of factor VIII.
• As the inheritance is not sex linked, haemorrhages due to impaired
clotting occur equally in males and females.