A 55 year old patient of myocardial infarction is on 75 mg aspirin for last 6 months. He has to undergo extraction of carious tooth. What the dentist should do?
**Core Concept**
Aspirin's antiplatelet effect makes it a crucial concern during dental procedures, especially tooth extractions, which can lead to bleeding complications. The dentist must consider this interaction to ensure the patient's safety.
**Why the Correct Answer is Right**
Aspirin irreversibly inhibits COX-1 enzyme in platelets, leading to reduced thromboxane A2 production and subsequent impairment of platelet aggregation. This effect can increase the risk of post-extraction bleeding. To mitigate this risk, the dentist should consider discontinuing aspirin for a short period before the procedure or administering local anesthesia with vasoconstrictors to minimize bleeding.
**Why Each Wrong Option is Incorrect**
* **Option A:** Discontinuing aspirin for a short period is not always necessary, and its benefits must be weighed against the increased cardiovascular risk. However, it is a viable option in certain cases.
* **Option B:** Administering vitamin K or other coagulation factors will not counteract aspirin's antiplatelet effect, as it primarily affects platelet function, not coagulation cascade.
* **Option C:** Using a different type of antiplatelet agent, such as clopidogrel, will not affect aspirin's antiplatelet effect, as they have different mechanisms of action.
* **Option D:** This option is incomplete, as it lacks any specific recommendation.
**Clinical Pearl / High-Yield Fact**
Aspirin's antiplatelet effect can be reversed with platelet transfusions, but this is rarely necessary and typically reserved for life-threatening bleeding.
**Correct Answer: B. Administer local anesthesia with vasoconstrictors to minimize bleeding.**