## **Core Concept**
The popliteal artery is a continuation of the femoral artery that supplies blood to the knee joint and surrounding structures. It runs posteriorly to the distal femur and can be injured in fractures of the lower end of the femur. The anatomical proximity of the popliteal artery to the distal femur makes it susceptible to injury in such fractures.

## **Why the Correct Answer is Right**
The correct answer, **supracondylar fracture of femur**, is associated with a high risk of popliteal artery injury due to the close relationship between the popliteal artery and the distal femoral metaphysis. The supracondylar region of the femur is close to where the femoral artery transitions into the popliteal artery, making this area particularly vulnerable to vascular injury in fractures.

## **Why Each Wrong Option is Incorrect**
- **Option A:** While certain types of femoral fractures can indeed cause vascular injury, the specific risk associated with **transverse fracture of shaft of femur** is generally lower compared to fractures closer to the knee joint like supracondylar fractures.
- **Option B:** **Intertrochanteric fracture of femur** occurs in a more proximal part of the femur, which is farther away from the popliteal artery, making it less likely to cause direct injury to this artery.
- **Option D:** **Fracture of tibial plateau** involves the proximal tibia and is not directly related to the popliteal artery's course near the distal femur.

## **Clinical Pearl / High-Yield Fact**
A key clinical point to remember is that popliteal artery injury is a significant concern in **supracondylar fractures of the femur** due to the anatomical location. Prompt vascular assessment is crucial in such cases to prevent limb loss.

## **Correct Answer:** . Supracondylar fracture of femur