Endoscopic transnasal approach for selected medial wall fractures
Implant materials
Titanium mesh for large floor defects
Porous polyethylene for smaller defects
Resorbable plates in pediatric patients
Special Populations
Pregnancy
Imaging considerations
CT maxillofacial with lead shielding when clinically indicated
Fetal radiation dose from maxillofacial CT is very low (< 0.01 mGy)
Benefit of diagnosis outweighs fetal radiation risk when fracture suspected
MRI as alternative if CT can be deferred and clinical picture allows
Avoid gadolinium contrast in first trimester unless essential
Medication safety
Acetaminophen preferred analgesic throughout pregnancy
NSAIDs: avoid after 20 weeks gestation (risk of premature ductus arteriosus closure)
Ondansetron for antiemetic use: caution in first trimester
Corticosteroids: use with caution; brief course acceptable if needed
Atropine: acceptable for oculocardiac reflex emergency treatment
Surgical considerations
Non-emergency orbital repair should be deferred until post-partum when possible
If urgent repair required, anaesthesia team involvement essential
Fetal monitoring during any anaesthesia after viability
Geriatric
Fracture pattern differences
More comminuted and open fractures due to less elastic bone
Less muscle entrapment but larger defects
Greater risk of late enophthalmos as orbital fat atrophies
Medication considerations
Higher prevalence of anticoagulant use
INR and anti-Xa assessment before any procedure
Reversal agent discussion with medical team if urgent surgery
Analgesics with caution
NSAIDs risk of renal impairment, GI bleeding
Opioids: higher delirium and fall risk
Acetaminophen preferred with dose reduction to 500 mg per dose if low weight or liver impairment
Vision and functional impact
Pre-existing vision impairment may mask new changes
Diplopia more functionally limiting in elderly with reduced compensatory capacity
Low threshold for admission given comorbidities
Social factors
Falls as mechanism: assess fall risk and home safety
Assault and elder abuse consideration
Support network for discharge planning
Pediatrics
Age-specific fracture patterns
More elastic bone produces trapdoor (greenstick) fractures
Bone snaps back, trapping muscle in fracture hinge
Minimal fracture displacement on CT despite significant entrapment
White-eyed blowout: minimal ecchymosis with severe restriction
Missed in up to 40% of cases due to subtle external signs
Oculocardiac reflex higher risk
Children with trapdoor fractures at highest risk
Vagal reflex more prominent in pediatric autonomic nervous system
Bradycardia, nausea, vomiting, syncope as presenting complaints
Surgical timing
Trapdoor fracture with entrapment: repair within 24 to 48 hours
Delay beyond 24 hours associated with significantly worse motility outcomes
Outcomes: ~85% of pediatric patients recover full motility after timely repair
Non-accidental trauma
Mechanism inconsistent with stated history
Multiple injuries at different stages of healing
Mandatory reporting obligations vary by jurisdiction
Child protection team involvement
Anaesthesia considerations
Oculocardiac reflex more likely under general anaesthetic
Premedication with atropine or glycopyrrolate discussed with paediatric anaesthesia
Background
Epidemiology
Incidence and demographics
Male to female ratio approximately 2:1
Peak incidence in young adult males
Assault and MVA are leading causes followed by sports and falls
Sports-related fractures most common in baseball, racquetball, hockey, and tennis
Burden of disease
Serious ocular injury present in approximately 24% of blowout fracture cases
Orbital cellulitis complicates approximately 0.8% of cases
Late enophthalmos may develop as orbital edema resolves and fat atrophies
Missed diagnosis
White-eyed blowout fracture missed in up to 40% of children
Oculocardiac reflex underrecognized as indicator of entrapment
Minimal external signs mislead clinicians in pediatric trapdoor fractures
Outcomes data
Approximately 85% of pediatric patients recover full motility after timely surgical repair
Approximately 63% of adults are diplopia-free after repair
Early repair (< 2 weeks) associated with better diplopia and enophthalmos outcomes
Pathophysiology
Fracture mechanism theories
Hydraulic theory
Blunt force increases intraorbital pressure
Pressure transmitted to thin floor (lamina papyracea) causing blowout
Most widely accepted mechanism
Buckling theory
Direct force transmitted along orbital rim to floor
Floor buckles under mechanical stress
Most injuries involve both mechanisms
Anatomical basis
Orbital floor formed by maxillary, zygomatic, and palatine bones
Thinnest region overlies maxillary sinus (0.5 to 1 mm thickness)
Infraorbital nerve runs in canal along orbital floor (explains V2 hypoesthesia)
Inferior rectus muscle and fat herniate through floor into maxillary sinus
Entrapment mechanism
In adults: fat and soft tissue herniate through large fracture defect
In children: trapdoor hinge effect traps inferior rectus within fracture
Entrapped muscle compresses (ishaemia risk) and restricts upgaze
Traction on trapped muscle activates oculocardiac reflex via trigeminal-vagal arc
Orbital compartment syndrome
Retrobulbar hemorrhage accumulates in closed bony compartment
IOP rises, compresses central retinal artery
Ischaemic optic neuropathy and vision loss within 90 to 120 minutes if untreated
Therapeutic Considerations
Evidence base for surgical timing
Pediatric trapdoor entrapment: repair within 24 hours improves outcomes (Class II evidence)
Adult fractures: early repair within 2 weeks recommended for symptomatic cases
National surgical analysis shows early repair (< 2 weeks) associated with better visual function restoration
Antibiotic prophylaxis evidence
AAST consensus: prophylactic antibiotics not recommended for closed nonoperative orbital fractures
Orbital cellulitis rate approximately 0.8%, not reduced by prophylaxis
Antibiotics increase resistance and adverse effects without benefit in uncomplicated cases
Lateral canthotomy evidence
Success rate for IOP reduction approximately 75 to 85% when performed promptly
Time to decompression is critical: ischaemic damage begins within 90 to 120 minutes
Technique training gap identified: many emergency physicians undertrained in procedure
ICD-10 classification
S02.3XXA: fracture of orbital floor, initial encounter
S02.40XA: fracture of malar, maxillary, and zygoma bones, initial encounter
S05.90XA: unspecified injury of eye and orbit, initial encounter
SNOMED CT
Blowout fracture of orbit (disorder)
Fracture of orbital floor (disorder)
Patient Discharge Instructions
copy discharge instructions
Orbital floor fracture home care
Do not blow your nose until cleared by your specialist (this can force air into your eye socket causing infection and worsening swelling)
Sneeze with your mouth open
Apply ice packs gently around the eye for 20 minutes at a time for the first 2 days
Sleep with your head elevated on two pillows to reduce swelling
Avoid bending over, heavy lifting, or straining
Avoid contact sports and strenuous activity until cleared
Soft diet if you have pain with chewing
Take pain medications as prescribed (acetaminophen, ibuprofen unless told otherwise)
What to expect during recovery
Double vision and swelling often improve over 1 to 2 weeks as edema resolves
Numbness of the cheek, upper lip, or upper teeth may take weeks to months to resolve
Some numbness may be permanent in a small number of cases
If surgery is planned, your specialist will contact you with a date
Return to emergency department immediately if
New or worsening vision loss in either eye
Increasing eye pain, swelling, or the eye appearing to bulge more
Worsening or new double vision
Fever above 38.5 degrees Celsius or increasing redness and swelling around the eye (signs of infection)
Nausea, vomiting, dizziness, or fainting
Slow heart rate or feeling your heart skipping beats
Follow-up instructions
Follow up with ophthalmology or your specialist within 1 to 2 weeks
Return sooner if any symptoms worsen before that appointment
Bring a list of your current medications to your follow-up visit
References
Guidelines and key sources
Guideline and consensus sources
Burnstine MA. Clinical recommendations for repair of isolated orbital floor fractures: an evidence-based analysis. Ophthalmology. 2002
Evidence-based indications and timing for orbital floor repair
Pandya RP, Deng W, Hodgson NM. Current guidelines and opinions in the management of orbital floor fractures. Otolaryngologic Clinics of North America. 2023
Comprehensive review of contemporary management approaches
Appelbaum RD et al. Antibiotic prophylaxis in injury: AAST critical care committee clinical consensus document. Trauma Surgery and Acute Care Open. 2023
AAST consensus against routine antibiotic prophylaxis for nonoperative orbital fractures
ACR Appropriateness Criteria: Orbits Vision and Visual Loss. Journal of the American College of Radiology. 2018
CT maxillofacial as primary imaging for orbital trauma
Key clinical studies
Nikunen M et al. Orbital blowout fractures: manifestations and missed diagnoses in 207 surgically treated patients. Medicina Oral Patologia Oral y Cirugia Bucal. 2024
Serious ocular injury in 24% of cases; surgical criteria and outcomes data
Takamura N et al. Surgical repair within 24 hours improves ocular motility in pediatric orbital fractures with muscle entrapment. Plastic and Reconstructive Surgery. 2025
Evidence for emergent surgical timing in pediatric trapdoor fractures
Scoville NM, Ding L, Stacey AW. Success rates of lateral canthotomy and cantholysis for treatment of orbital compartment syndrome. American Journal of Emergency Medicine. 2023
Success rate data for canthotomy and cantholysis
Shen C et al. National analysis of surgical intervention for orbital floor fractures: implications on early versus late repair. Annals of Plastic Surgery. 2025
Early repair outcomes data
Yew CC et al. White-eyed blowout fracture: diagnostic pitfalls and review of literature. Injury. 2015
Diagnostic challenges and missed diagnosis rate in pediatric patients
SymptomDx is an educational tool for medical professionals. It does not replace clinical judgment. Verify all clinical data and drug dosages with authoritative sources.