eye_injuries
Table of Contents
Eye injuries
see also:
patient information sheets
introduction
- patients with a possible open globe injury should be examined with extreme caution, and clinicians must avoid placing pressure on the globe (eg, with lid eversion or foreign body [FB] removal) or using eye drops until this injury is ruled out.
- RED FLAGS
- corneal laceration
- mechanism suggestive of penetrating injury (eg. hammer, glass)
- corneal infection - infiltrate in anterior chamber
open globe injuries
epidemiology and pathophysiology
- 18-41% are caused by intraocular foreign bodies (IOFBs) of which 90% are metallic such as from motor vehicle accidents, lawn mowers, weapons, hammering on metal or stone, or machine tool use.
- most IOFB's are found in the vitreous cavity.
- lacerations may also be caused in young children from falling onto sharp objects such as scissors, pens, thorns or knives.
- lacerations involve the cornea in ~2/3rds with the remainder involving the sclera
- the globe may rupture from blunt trauma - usually at its weakest spot where the sclera is thinnest near the equator directly behind the insertion of the rectus muscles, or at sites of previous ocular surgery.
complications
- extrusion of ocular contents
- endophthalmitis
- occurs in 2-7%, but higher in those with IOFBs (up to 13%), and particularly a risk if retained FB, organic FB (eg thorn) or delay in primary closure
- traumatic cataract (late)
- the most common late complication that limits vision
- corneal scarring (late)
- retinal detachment (late)
Mx of open globe injuries
high index of suspicion
clinical features
- intraocular or protruding foreign body
- obvious scleral or corneal laceration
- volume loss to the eye
- uveal prolapse (iris of ciliary body)
- eccentric or peaked pupil
- 360 degree, bullous subconjunctival haemorrhage suggesting posterior rupture
- decreased visual acuity
- relative afferent pupillary defect by swinging penlight technique
initial Mx in ED
- keep nil orally
- assess other injuries as per usual
- do NOT remove any protruding foreign bodies
- minimise increasing intraocular pressure:
- avoid eye manipulation such as lid eversion, tonometry, or ocular ultrasound
- elevate head of bead to 30deg if haemodynamics allows (ie. not hypotensive)
- aggressively Mx nausea or vomiting eg. ondansetron iv
- do NOT use eye drops (eg. LA's, flourescein, cycloplegics]]
- place eye shield after initial eye examination
- begin iv antibiotics:
- vancomycin + ceftazidime (or ciprofloxacin if penicillin sensitive)
- immediate ophthalmology consult
- CT scan of orbits with 1-2mm slices
- CT findings of open globe injury include IOFB, intraocular air, eye wall deformity, volume loss of the eye, and irregular scleral contour
- ocular CT has limited ability (sensitivity 56-75%) to demonstrate an occult open globe injury and should not be used as the sole determining factor for decisions regarding surgical exploration
- urgent surgical repair, preferably within 24hrs of injury.
references and other resources
eye_injuries.txt · Last modified: 2018/09/10 08:44 by 127.0.0.1