A child presented with blunt abdominal trauma, the first investigation to be done is –
**Core Concept**
The child presented with blunt abdominal trauma requires immediate assessment to identify potential internal injuries. The first step in managing abdominal trauma involves evaluating the patient's hemodynamic stability and assessing for signs of peritoneal irritation.
**Why the Correct Answer is Right**
The FAST (Focused Assessment with Sonography for Trauma) examination is the preferred initial imaging modality for blunt abdominal trauma in children. It involves a rapid ultrasound evaluation of the abdomen to detect free intraperitoneal fluid, which is indicative of internal bleeding or organ injury. The FAST exam is non-invasive, quick, and can be performed at the bedside, making it ideal for initial assessment in the emergency department.
**Why Each Wrong Option is Incorrect**
**Option A:** X-ray is not the first-line imaging modality for blunt abdominal trauma, as it may not detect free intraperitoneal fluid or certain types of injuries.
**Option B:** CT scan is not typically used as the initial imaging modality in children due to radiation exposure concerns and the need for sedation.
**Option C:** MRI is not suitable for initial assessment in trauma patients due to its limited availability, longer scanning time, and inability to detect free fluid.
**Clinical Pearl / High-Yield Fact**
Remember, the FAST exam is a rapid, bedside assessment tool that can help identify patients who require immediate surgical intervention. It is essential to perform the exam in conjunction with a thorough clinical evaluation to ensure accurate diagnosis and treatment.
**Correct Answer:** A. FAST examination.