Final answer:
The EMT should use a large bulky dressing to stabilize a flail chest.
Step-by-step explanation:
The EMT should use a large bulky dressing to stabilize a flail chest. A flail chest occurs when two or more consecutive ribs are fractured in two or more places, causing a segment of the chest wall to become detached.
A large bulky dressing can be used to immobilize the flail segment, preventing further movement and reducing the risk of complications such as lung injury. This dressing should be secured tightly to the chest to provide support and stability.
Using a small pillow or towel may not provide enough support or stability to adequately stabilize a flail chest.