A patient cam e with lower chest trauma with pain in abdomen. His BP is 60/40 pulse 120 next best investigation –
## **Core Concept**
The patient presents with signs of shock (hypotension with BP 60/40 and tachycardia with pulse 120) following lower chest trauma and abdominal pain. This clinical scenario suggests possible internal bleeding or significant organ damage. The next best investigation should quickly and accurately identify the source and extent of injury.
## **Why the Correct Answer is Right**
The correct answer, **Focused Assessment with Sonography for Trauma (FAST)**, is a bedside ultrasound examination that is quick, non-invasive, and can be performed in unstable patients to detect free intraperitoneal fluid (often blood) or pericardial effusion. It's particularly useful in emergency settings for patients with suspected abdominal or pelvic trauma who are hemodynamically unstable. FAST can help identify patients who require immediate surgical intervention.
## **Why Each Wrong Option is Incorrect**
- **Option A:** While a **Chest X-ray** can provide information about the chest trauma, such as pneumothorax or hemothorax, it does not directly assess for abdominal injuries or free fluid that could be causing the patient's shock.
- **Option B:** A **Complete Blood Count (CBC)** can provide information on blood loss (through hematocrit levels) but does not directly identify the source of bleeding or organ damage.
- **Option C:** **CT abdomen** is a highly sensitive and specific investigation for abdominal injuries but is not the immediate next step in a hemodynamically unstable patient due to the time required to perform the scan and the potential need to move the patient to the radiology department.
## **Clinical Pearl / High-Yield Fact**
In trauma patients, especially those who are unstable, the **FAST exam** is a critical tool for quickly identifying life-threatening injuries that require immediate intervention. Remember, the priorities in trauma care are to ensure airway patency, breathing, circulation (the ABCs), and disability (assessment of neurological status).
## **Correct Answer:** . **Focused Assessment with Sonography for Trauma (FAST)**