Which of the following statements are true about Flail chest? 1. Fracture of 3 or 4th ribs 2. Mechanical ventilation always needed 3. Mediastinal shift 4. Inward movement of chest wall during inspiration 5. Ultimately leads to Respiratory failure

**Core Concept**
Flail chest is a life-threatening condition that occurs when a segment of the rib cage breaks due to trauma and becomes detached from the rest of the chest wall. This can lead to **paradoxical breathing**, where the flail segment moves in the opposite direction of the rest of the chest. **Mechanical ventilation** is often required to support breathing.

**Why the Correct Answer is Right**
The correct answer includes statements that are true about flail chest, such as the inward movement of the chest wall during inspiration, which is a characteristic of paradoxical breathing. Flail chest can ultimately lead to **respiratory failure** if not properly managed. The fracture of 3 or 4 ribs can contribute to the development of flail chest.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not include all the true statements about flail chest.
**Option B:** This option is incorrect because mechanical ventilation is not always needed, although it is often required.
**Option D:** This option is incorrect because it does not include the statement about inward movement of the chest wall during inspiration.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that flail chest can lead to **respiratory distress** and requires prompt medical attention. The diagnosis of flail chest is primarily clinical, based on the physical examination and **chest X-ray** findings.

**Correct Answer:** C. 4. Inward movement of chest wall during inspiration, 5. Ultimately leads to Respiratory failure

✓ Correct Answer: C. 1,4,5 True & 2,3 False