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ANEMIAS
MED X – Simplifying Difference & Diagnosis of Anemias. 🧠✨👇👇👇JOIN CHANNEL👇👇👇
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Anemia is defined as a decrease in the oxygen-carrying capacity of blood, usually due to reduced hemoglobin (Hb), hematocrit (Hct), or red blood cell (RBC) count.
General Symptoms of Anemia (Guyton & Hall, 14th Ed.):
Fatigue, weakness, pallor
Dyspnea on exertion
Palpitations
Dizziness, headache
Cold intolerance
General Signs:
Pallor (conjunctiva, nail beds, palmar creases)
Tachycardia
Systolic flow murmur
Glossitis, cheilitis (in specific types)
1. Microcytic Anemias (MCV <80 fL)
A. Iron Deficiency Anemia (IDA)
Pathophysiology:
Reduced iron → impaired heme synthesis FOR MORE
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Anemia is defined as a decrease in hemoglobin concentration or red blood cell (RBC) mass, leading to reduced oxygen-carrying capacity of the blood. It is a high-yield topic in hematology due to its wide range of causes and clinical importance.
Anemia can be broadly classified based on mean corpuscular volume (MCV) into microcytic, normocytic, and macrocytic anemia. Microcytic anemia is commonly caused by iron deficiency, thalassemia, and anemia of chronic disease. Normocytic anemia includes acute blood loss, hemolysis, and chronic diseases. Macrocytic anemia is mainly due to vitamin B12 or folate deficiency, often associated with megaloblastic changes.
Common clinical features include fatigue, pallor, shortness of breath, dizziness, and tachycardia. Specific signs such as koilonychia in iron deficiency anemia or neurological symptoms in vitamin B12 deficiency can help in diagnosis.
Laboratory evaluation includes complete blood count (CBC), peripheral smear, reticulocyte count, and iron studies. Identifying the underlying cause is essential for appropriate management.
These high-yield notes provide a structured overview of classification, causes, symptoms, and investigations, making them ideal for quick revision and exam preparation.
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