9. Hemostasis | USMLE Step 1 Pathology

📌 𝐅𝐨𝐥𝐥𝐨𝐰 𝐨𝐧 𝐈𝐧𝐬𝐭𝐚𝐠𝐫𝐚𝐦:- / drgbhanuprakash
📌𝗝𝗼𝗶𝗻 𝗢𝘂𝗿 𝗧𝗲𝗹𝗲𝗴𝗿𝗮𝗺 𝗖𝗵𝗮𝗻𝗻𝗲𝗹 𝗛𝗲𝗿𝗲:- t.me/bhanuprakashdr
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Hemostasis: USMLE Step 1 Pathology
Hemostasis is a critical physiological process that ensures the maintenance of blood flow within blood vessels while preventing excessive bleeding or thrombosis. This intricate mechanism involves a delicate balance between procoagulant and anticoagulant factors, platelets, and endothelial cells. 💉 Upon vessel injury, vasoconstriction occurs to reduce blood loss, followed by the formation of a platelet plug through platelet adhesion, activation, and aggregation. Simultaneously, the coagulation cascade is initiated, leading to the conversion of fibrinogen to fibrin and the formation of a stable blood clot. Endothelial cells play a crucial role in hemostasis by releasing factors such as prostacyclin and nitric oxide to inhibit platelet aggregation and promote vasodilation. Once hemostasis is achieved, fibrinolysis begins, mediated by plasminogen activation to dissolve the blood clot and restore blood flow. Disorders of hemostasis can lead to bleeding disorders, such as hemophilia and von Willebrand disease, or thrombotic disorders, including deep vein thrombosis and pulmonary embolism. Understanding the intricate mechanisms of hemostasis is essential for medical students preparing for the USMLE Step 1 exam.
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[@doctorbhanuprakash]

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