Intravascular projectile embolism from firearm injuries: How did it get there?

Area of Science:

• Radiology
• Trauma Surgery
• Cardiovascular Imaging

Background:

• Intravascular projectile embolization is a rare, life-threatening complication of penetrating firearm injuries.
• Projectiles can migrate within the cardiovascular system, far from the initial entry wound, complicating diagnosis.
• The atypical migration patterns often lead to delayed or missed diagnoses.

Purpose of the Study:

• To review the classification and imaging of ballistic embolization.
• To provide a mechanism-based, side-of-circulation perspective on projectile migration.
• To illustrate diagnostic challenges and management strategies through case examples.

Main Methods:

• Review of classification and imaging techniques for intravascular projectile embolization.
• Analysis of three cases demonstrating antegrade and retrograde migration in both left and right circulations.
• Emphasis on CT angiography as the primary diagnostic modality.

Main Results:

• CT angiography is crucial for diagnosing, classifying, and planning treatment for ballistic embolization.
• The key diagnostic clue is the mismatch between the projectile's trajectory and its final resting place.
• Classification based on the side of circulation (left or right) dictates management strategies.

Conclusions:

• Radiologists must be aware of atypical projectile migration patterns in firearm injuries.
• Maintaining an appropriate search pattern and anticipating unexpected embolic sites are vital.
• Effective communication of findings guides multidisciplinary management for this rare complication.