Which of the following is the best way of preventing development deep vein thrombosis (DVT) in postoperative period?
**Core Concept**
Deep vein thrombosis (DVT) is a blood clot that forms in the deep veins of the body, often in the legs. In the postoperative period, patients are at increased risk of developing DVT due to immobilization, surgery, and underlying medical conditions. Preventing DVT is crucial to avoid complications such as pulmonary embolism.
**Why the Correct Answer is Right**
The best way to prevent DVT in the postoperative period is through the use of **low molecular weight heparin (LMWH)**, such as enoxaparin. LMWH works by inhibiting the coagulation cascade, specifically by binding to and activating antithrombin, which in turn inactivates factor Xa and factor IIa (thrombin). This prevents the formation of blood clots and reduces the risk of DVT.
**Why Each Wrong Option is Incorrect**
* **Option A:** **Aspirin** is not effective in preventing DVT in the postoperative period. While aspirin has antithrombotic properties, it is not potent enough to prevent DVT in high-risk patients.
* **Option B:** **Warfarin** is an oral anticoagulant that works by inhibiting vitamin K-dependent clotting factors. However, warfarin has a narrow therapeutic index and requires regular monitoring of international normalized ratio (INR) levels, making it less convenient for postoperative DVT prophylaxis.
* **Option D:** **Compression stockings** are a mechanical method of preventing DVT, but they are not as effective as pharmacological prophylaxis with LMWH. Compression stockings are often used in addition to pharmacological prophylaxis to enhance its effectiveness.
**Clinical Pearl / High-Yield Fact**
In high-risk patients, such as those undergoing major orthopedic surgery, the American College of Chest Physicians recommends the use of LMWH for DVT prophylaxis. It is essential to weigh the benefits and risks of DVT prophylaxis in each patient and to choose the most appropriate method based on individual patient factors.
**Correct Answer:** C.