A patient was on DVT prophylaxis. All of the following has perforators which connect superficial veins to the deep veins except –
**Core Concept**
The question is testing the anatomical knowledge of the venous system, specifically the communication between superficial and deep veins through perforating veins. The deep venous system is responsible for returning oxygen-depleted blood from the lower limbs to the heart, while the superficial system collects blood from the surface of the skin.
**Why the Correct Answer is Right**
Perforating veins, also known as communicating veins, connect the superficial venous system to the deep venous system in the lower limbs. These veins play a crucial role in preventing blood from accumulating in the superficial veins and directing it towards the deep veins for return to the heart. The perforating veins are located in the subcutaneous tissue and are a key component of the venous drainage system of the lower limbs.
**Why Each Wrong Option is Incorrect**
* **Option A:** Incompetent perforating veins can lead to the development of varicose veins, which are a common cause of chronic venous insufficiency. Therefore, perforating veins do have perforators that connect superficial veins to the deep veins.
* **Option B:** Like incompetent perforating veins, incompetent communicating veins can also lead to varicose veins and chronic venous insufficiency. Therefore, communicating veins do have perforators that connect superficial veins to the deep veins.
* **Option C:** The great saphenous vein is a superficial vein that communicates with the femoral vein through the saphenofemoral junction, which is a type of perforating vein. Therefore, the great saphenous vein does have perforators that connect superficial veins to the deep veins.
**Clinical Pearl / High-Yield Fact**
Remember that incompetent perforating veins can lead to the development of varicose veins and chronic venous insufficiency, making them a common cause of lower limb morbidity.
**Correct Answer: D.**