FAST scan: is it worth doing in hemodynamically stable blunt trauma patients?

Area of Science:

• Emergency Medicine
• Radiology
• Trauma Surgery

Background:

• Focused Assessment with Sonography for Trauma (FAST) is a primary diagnostic tool for trauma patients.
• Its effectiveness in diagnosing intra-abdominal injuries and guiding decisions in hemodynamically stable blunt trauma patients remains debated.
• This study evaluates FAST's role in stable blunt trauma patients.

Purpose of the Study:

• To evaluate the results of FAST in hemodynamically stable blunt trauma patients.
• To determine the diagnostic utility of FAST in this patient population.
• To assess the impact of FAST on clinical decision-making compared to CT scans.

Main Methods:

• Prospective review of a trauma database over a 7-year period.
• FAST examinations performed by surgery residents, with positive findings indicating free intra-abdominal fluid.
• Confirmation of intra-abdominal injury via CT scan, diagnostic peritoneal lavage, or exploratory laparotomy.

Main Results:

• FAST demonstrated an overall sensitivity of 43% and specificity of 99%.
• In hemodynamically stable blunt trauma patients, FAST sensitivity was 41% with a 95% negative predictive value.
• 118 false-negative FAST scans occurred, with 37.3% requiring subsequent laparotomy.

Conclusions:

• The low sensitivity of FAST suggests a risk of missed intra-abdominal injuries in stable blunt trauma patients.
• CT confirmation is recommended for FAST-positive stable patients to better assess injuries and guide management.
• FAST appears most valuable in hemodynamically unstable patients, not as a standalone tool for stable blunt trauma.