Pathogenesis of canalicular lacerations

Area of Science:

• Ophthalmology
• Oculoplastics
• Trauma Surgery

Background:

• Canalicular lacerations are injuries to the tear drainage system.
• Understanding the mechanism of injury is crucial for appropriate management.

Purpose of the Study:

• To investigate the pathogenesis and mechanisms of canalicular lacerations.
• To classify injury types and identify associated trauma patterns.

Main Methods:

• Retrospective case series of 236 patients with canalicular lacerations.
• Classification of injury mechanisms: direct (penetrating), indirect (avulsive), or diffuse (avulsive).
• Documentation of associated injuries, including facial fractures and globe trauma.

Main Results:

• Direct penetrating injuries accounted for 55.2% of cases, while avulsive injuries (indirect/diffuse) comprised 45.7%.
• Associated injuries occurred in 64% of patients, most commonly involving eyelids and periocular soft tissues.
• More severe associated injuries (orbital fractures, globe rupture, head trauma) were more frequent with diffuse trauma.

Conclusions:

• Canalicular lacerations result from direct penetrating or indirect avulsive forces.
• Direct penetrating injuries are more common than avulsive injuries.
• Diffuse trauma is linked to a higher incidence of severe associated injuries, necessitating thorough evaluation.