The fate of red blood cells (RBCs) refers to what happens to them at the end of their life cycle. Here's a short summary: 🩸 Fate of RBCs - Lifespan: RBCs live for about 120 days in circulation. - Senescence: As they age, RBCs lose flexibility and surface proteins change, marking them for removal. -Read more
The fate of red blood cells (RBCs) refers to what happens to them at the end of their life cycle. Here’s a short summary:
🩸 Fate of RBCs
– Lifespan: RBCs live for about 120 days in circulation.
– Senescence: As they age, RBCs lose flexibility and surface proteins change, marking them for removal.
– Destruction:
– Most are phagocytosed by macrophages in the spleen, liver, and bone marrow.
– A small percentage undergo spontaneous hemolysis in circulation.
– Breakdown:
– Hemoglobin is split into heme and globin.
– Globin is broken down into amino acids.
– Heme is converted into biliverdin, then bilirubin, which is excreted via bile.
– Iron from heme is recycled and stored or reused.
This process is essential for maintaining healthy blood composition and preventing the accumulation of damaged cells.
See less
A decreased ESR (Erythrocyte Sedimentation Rate) can occur due to various physiological and pathological conditions. Here's a concise overview: 🔽 Causes of Decreased ESR 🧬 Blood-related Conditions - Polycythemia vera: Increased number of red blood cells slows sedimentation - Sickle cell disease: AbnRead more
A decreased ESR (Erythrocyte Sedimentation Rate) can occur due to various physiological and pathological conditions. Here’s a concise overview:
🔽 Causes of Decreased ESR
🧬 Blood-related Conditions
– Polycythemia vera: Increased number of red blood cells slows sedimentation
– Sickle cell disease: Abnormal RBC shape prevents stacking (rouleaux formation)
– Hereditary spherocytosis: Spherical RBCs resist sedimentation
– Acanthocytosis: Spiked RBC membranes disrupt settling
🧫 Protein & Plasma Abnormalities
– Hypofibrinogenemia: Low fibrinogen reduces RBC aggregation
– Hypogammaglobulinemia: Low immunoglobulin levels affect plasma viscosity
– Hyperviscosity syndrome: Thick plasma slows RBC movement
❤️ Cardiovascular & Systemic Conditions
– Congestive heart failure: Alters blood flow and plasma composition
– Liver disease: Affects plasma protein synthesis
💊 Medications
– NSAIDs (e.g., aspirin, ibuprofen)
– Corticosteroids
– Antibiotics and immunosuppressants (e.g., penicillamine, quinine)
🚬 Lifestyle Factors
– Smoking
– High-dose aspirin therapy
– Certain dietary patterns
🧪 Clinical Note
See lessA low ESR is usually not a cause for concern on its own. However, it may help identify underlying conditions when interpreted alongside other tests.