Trauma to the Lacrimal System



Trauma to the Lacrimal System


Pradeep Mettu, MD



DISEASE DESCRIPTION

Trauma to the lacrimal system can occur from a variety of mechanisms, including sharp and blunt trauma. In cases of periocular trauma, a full ophthalmic examination should be performed to assess for globe injury (corneal abrasion, hyphema, open globe, etc). Depending on the mechanism of trauma and examination findings, a noncontrasted computed tomography (CT) scan of the orbits should be considered to evaluate for orbital fractures, nasolacrimal canal fractures, and intraocular or intraorbital foreign bodies. The CT scan can also be helpful in evaluating globe contour in cases where an open globe is suspected but not obvious. Organic matter may be difficult to visualize on CT — notify the radiologist if retained organic matter is possible.

In the emergency room or hospital setting, the consulting provider should be advised to administer tetanus prophylaxis if indicated and keep the patient NPO (nothing by mouth) while oculoplastic consultation is pending. Depending on the mechanism of injury, antibiotic therapy may also be initiated.


MANAGEMENT OPTIONS

Eyelid lacerations affecting the margin that are at the level of or medial to the punctum should be suspected to involve the lacrimal system until proved otherwise. If lacrimal involvement is suspected, diagnostic probing and irrigation should be performed. If this cannot comfortably be done at the bedside, exploration of the laceration and probing and irrigation can be performed after local anesthesia with or without intravenous (IV) sedation (or general anesthesia). Options for managing lacrimal trauma include:



  • Observation


  • Surgical repair


INDICATIONS FOR SURGERY



  • Laceration of punctum


  • Laceration of canaliculus


  • Injury to lacrimal sac or nasolacrimal canal


Surgical repair is generally attempted within 72 hours of the injury. Deferring surgical repair may lead to chronic epiphora. Delayed reconstruction can be more challenging with less predictable outcomes and greater risk of epiphora. Primary repair of lacrimal trauma is recommended, assuming the patient is a good candidate for surgery. If the patient has acute life-threatening medical needs, repair of the lacrimal system should be deferred until the patient is otherwise stable. If there is an open globe, this should be addressed before repair of adnexal soft tissue injury.


SURGICAL DESCRIPTION


Preoperative Considerations



  • Injury that is isolated to the adnexal soft tissues (ie, no concurrent open globe) should be repaired within 72 hours.


  • Stent options (this is not a comprehensive list but represents options the author finds useful)



    • Monocanalicular



      • Mini Monoka (FCI) — preferred by the author because these are less likely to cause ocular irritation compared to bicanalicular stents, do not require retrieval from the inferior meatus, and are straightforward to remove.


      • Mono-Crawford stent (FCI)


    • Bicanalicular



      • Crawford stent with internal silk suture (JEDMED)


Surgical Technique



  • Infiltrate the affected areas with local anesthetic.


  • If there is a possibility that stents will be retrieved from the nose, pack the inferior meatus with Afrin-soaked cottonoids with the aid of a nasal speculum and bayonet forceps.


  • Prep the full face with ophthalmic Betadine solution or other prep of choice.


  • Drape the patient, allowing access to the nose for retrieval of stents if needed.


  • Explore and characterize the full extent of laceration. Intraoperative photographs may be helpful for documentation, if possible.


  • Irrigate the wound with antibiotic solution or dilute Betadine.


  • Dilate the puncta of the affected eyelids.


  • Pass a Bowman lacrimal probe into the punctum and advance it into the canaliculus to examine the lacrimal system for injury. Often, canalicular injury is evident at this point.


  • If lacrimal injury is still in question after probing, prepare for lacrimal irrigation.

May 10, 2021 | Posted by in OPHTHALMOLOGY | Comments Off on Trauma to the Lacrimal System

Full access? Get Clinical Tree

Get Clinical Tree app for offline access