In cases of blunt abdominal trauma, what does a FAST exam assess for?

• A. Fractures
• B. Internal bleeding
• C. Organ lacerations
• D. Cardiac function

Answer: (B)

The FAST (Focused Assessment with Sonography for Trauma) exam is specifically designed to assess for internal bleeding or fluid in the abdominal cavity following blunt abdominal trauma. This ultrasound-based assessment quickly evaluates various spaces in the abdomen, primarily looking for free fluid that could indicate hemorrhage.

The exam typically focuses on four main areas: the pericardial space, the right upper quadrant, the left upper quadrant, and the pelvis. By identifying the presence of fluid, clinicians can determine whether there is significant internal bleeding that may require surgical intervention.

While the FAST exam can provide some indirect information regarding organ injuries (such as lacerations), its primary purpose is to detect the presence of free fluid indicative of blood loss, making it a critical tool in the acute evaluation of traumatic abdominal injuries. Other options, such as fractures or cardiac function, are not within the scope of what the FAST exam specifically addresses.