## **Core Concept**
The clinical scenario describes a patient with a comminuted fracture of the tibia and fibula, presenting with severe pain, particularly with dorsiflexion of the foot, and a tense calf. This presentation is suggestive of **compartment syndrome**, a condition characterized by increased pressure within a closed osteofascial compartment, leading to muscle and nerve ischemia.

## **Why the Correct Answer is Right**
The appropriate step in managing suspected compartment syndrome is to perform a **fasciotomy**. Compartment syndrome is a medical emergency that requires prompt intervention to prevent permanent damage, including muscle necrosis and loss of limb function. The presence of palpable pulses does not rule out compartment syndrome, as pulses can be present even when compartment pressures are elevated. The clinical symptoms, including pain with passive stretching of muscles (in this case, dorsiflexion of the foot) and a tense compartment, are critical for the diagnosis.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is not provided, but typically, conservative management would not be appropriate for compartment syndrome due to the risk of rapid progression to irreversible ischemia.
- **Option B:** This option is also not provided, but examples might include immobilization or pain management without addressing the underlying cause of increased compartment pressure.
- **Option C:** Similarly, without specifics, any option suggesting delay in treatment or failure to address the increased compartment pressure would be incorrect.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is the **six P's** often used to describe the signs of compartment syndrome: Pain (particularly with passive stretching), Pallor, Pulselessness, Poikilothermia (cold to touch), Paresthesia, and Paralysis. However, not all signs may be present, and the absence of pulses is a late finding. Early recognition and intervention are crucial.

## **Correct Answer Line**
**Correct Answer: D. Fasciotomy**.