Bleeding in DIC is most closely related to –
**Core Concept**
Disseminated Intravascular Coagulation (DIC) is a complex condition characterized by the systemic activation of blood coagulation, leading to the formation of microthrombi in small blood vessels. This results in a paradoxical state of both thrombosis and bleeding due to the consumption of clotting factors and platelets.
**Why the Correct Answer is Right**
In DIC, the excessive activation of the coagulation cascade leads to the formation of thrombin, which converts fibrinogen into fibrin, resulting in the deposition of fibrin clots within the microvasculature. This consumes platelets and clotting factors, ultimately impairing the body's ability to form new clots, thereby predisposing to bleeding. The correct answer is related to the depletion of these essential components.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect as it does not directly relate to the pathophysiology of bleeding in DIC.
* **Option B:** This option is incorrect as it refers to a different condition, not directly related to the coagulopathy seen in DIC.
* **Option C:** This option is incorrect as it is a consequence of DIC, but not the primary reason for bleeding.
**Clinical Pearl / High-Yield Fact**
In cases of DIC, the presence of a low fibrinogen level (<100 mg/dL) is a strong indicator of the coagulopathic process and is often associated with an increased risk of bleeding.
**Correct Answer: C. Consumed platelets and clotting factors.**