**Core Concept**
The management of pelvic fractures with associated urethral injuries requires a prioritized approach to prevent further complications, such as shock and hemorrhage. This is due to the complex anatomy of the pelvic region and the proximity of vital structures, including major blood vessels and the urethra.

**Why the Correct Answer is Right**
The initial step in managing pelvic fractures with urethral injuries is to address shock and hemorrhage. This is because the pelvic fracture can cause significant blood loss, leading to hypovolemic shock. The American College of Surgeons Committee on Trauma (ACS COT) guidelines emphasize the importance of initial stabilization and resuscitation in trauma patients. In this scenario, the patient's vital signs and hemodynamic status should be closely monitored and treated promptly to prevent further deterioration.

**Why Each Wrong Option is Incorrect**
**Option A:** Repair of the injured urethra should not be the first step in management. This is because the patient may be unstable due to shock and hemorrhage, and attempting to repair the urethra could exacerbate the situation.

**Option B:** Fixation of the pelvic fracture is an important aspect of management, but it should not be the first step. The patient's hemodynamic stability should be ensured before proceeding with any surgical interventions.

**Option D:** Splinting the urethra with catheters may be necessary in some cases, but it is not the most important first step in management. The patient's shock and hemorrhage should be addressed first.

**Clinical Pearl / High-Yield Fact**
In the management of pelvic fractures with urethral injuries, it is essential to remember the "ABCDE" approach: Airway, Breathing, Circulation, Disability, and Exposure. Ensuring the patient's hemodynamic stability is crucial before proceeding with any further interventions.

**Correct Answer:**
✓ Correct Answer: C. Treatment of shock and haemorrhage