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Approach to the Critical Patient
Immediate priorities
Time critical stabilization
Hemodynamic instability
Shock physiology
Altered mental status limiting eye exam
Immediate vision threat
Sudden severe vision loss
Macula-on symptoms
Trauma red flags
Suspected open globe
Chemical injury
Immediate actions
Ophthalmology consultation now for suspected retinal detachment
If macula-on suspected, emergent surgical planning within 24 hours
If macula-off suspected, urgent surgical planning within days
Protective measures if trauma
Rigid eye shield
Avoid ocular pressure
Symptom control
Antiemetic therapy for vomiting to reduce Valsalva
Analgesia for pain limiting exam
Key decision points
High risk presentation triage
Curtain or shadow progressing
Retinal detachment until proven otherwise
New flashes with new floaters
Posterior vitreous detachment with retinal tear risk
Visual field defect
Localization by patient description
Macula status estimate
Central vision preserved
Likely macula-on
Central vision reduced or distorted
Likely macula-off
Monitoring and escalation
Reassessment triggers
Worsening vision in ED
Escalate to immediate ophthalmology bedside evaluation
New afferent pupillary defect
Consider extensive detachment or alternate diagnosis
Severe headache and nausea with high IOP concern
Consider acute angle closure glaucoma as alternate diagnosis
History
Symptom characterization
Visual symptoms
Flashes
Photopsias in peripheral vision
Worse in dark environment
Floaters
New onset
Shower of floaters
Curtain or shadow
Direction of onset
Progression speed
Central vision change
Blurred central vision
Metamorphopsia
Timing and context
Timeline
Symptom onset date and time
Hours
Days
Progression
Stable
Expanding field loss
Triggers and exposures
Eye trauma
Blunt mechanism
Penetrating concern
Recent ocular surgery
Cataract surgery
Vitreoretinal procedures
Heavy exertion or Valsalva
Weight lifting
Severe coughing
Risk factors
Patient factors
High myopia
Prior lattice degeneration diagnosis
Prior retinal tear history
Age older than 50 years
Posterior vitreous detachment risk
Family history of retinal detachment
First degree relative
Ocular history
Prior retinal detachment
Same eye
Fellow eye
Prior laser retinopexy
Retinal tear treatment history
Inflammatory eye disease
Uveitis
Systemic conditions
Diabetes mellitus
Proliferative diabetic retinopathy risk for tractional detachment
Sickle cell disease
Retinopathy risk
Pitfalls
History pitfalls
Flashes and floaters without curtain
Retinal tear still possible
Symptoms attributed to migraine
Persistent monocular field defect favors retinal pathology
Bilateral symptoms
Consider neurologic causes
Physical Exam
Visual function and pupils
Vision assessment
Visual acuity each eye
Best corrected if available
Pinhole response
Visual fields by confrontation
Peripheral field loss mapping
Central scotoma screening
Pupils
Relative afferent pupillary defect
Suggests extensive retinal involvement
Alternate optic nerve pathology consideration
Shape and reactivity
Irregular pupil after trauma
Anterior segment and pressure
External and anterior exam
Eyelids and conjunctiva
Trauma signs
Chemosis
Cornea
Clarity
Epithelial defects
Anterior chamber
Depth asymmetry
Hyphema
Intraocular pressure
IOP measurement
Avoid if open globe suspected
Elevated IOP suggesting alternate diagnosis
Posterior segment
Fundus assessment
Dilated ophthalmoscopy if safe
Retinal tear visualization
Detached retina appearance
Red reflex
Reduced or asymmetric
Media opacity confounding
Key findings
Shafer sign
Pigment cells in anterior vitreous
High association with retinal tear
Vitreous hemorrhage
Retinal tear until proven otherwise
Limits direct visualization
Pitfalls
Exam pitfalls
Normal appearing fundus with limited view
Peripheral tear possible
Small detachment without obvious field loss
Early detachment still vision threatening
Confrontation fields normal
Subtle defects missed without formal perimetry
Differential Diagnosis
Vision loss with flashes or floaters
Posterior vitreous detachment
Flashes and floaters without curtain
Retinal tear coexistence risk
Retinal tear without detachment
Photopsias
New floaters
Vitreous hemorrhage
Sudden floaters and haze
Diabetes
Retinal detachment types
Rhegmatogenous retinal detachment
Retinal break with fluid under retina
Most common type
Tractional retinal detachment
Proliferative diabetic retinopathy
No retinal break
Exudative retinal detachment
Inflammation
Tumor
Other emergent eye diagnoses
Central retinal artery occlusion
Sudden painless severe loss
Cherry red spot
Central retinal vein occlusion
Subacute loss
Fundus hemorrhages
Acute angle closure glaucoma
Pain
Halos
High IOP
Optic neuritis
Pain with eye movement
Color desaturation
Giant cell arteritis
Jaw claudication
Scalp tenderness
Age older than 50 years
Neuro causes mimicking field loss
Stroke or TIA
Homonymous hemianopia
Neurologic deficits
Migraine aura
Positive visual phenomena
Transient symptoms
Coding alignment
ICD-10 retinal detachment codes
H33.0 retinal detachment with retinal break
H33.4 traction detachment of retina
H33.2 serous retinal detachment
Laboratory Tests
Labs for alternate diagnoses
Inflammatory and vascular screening
ESR for suspected giant cell arteritis
Elevated ESR supports but does not confirm
Normal ESR does not exclude
CRP for suspected giant cell arteritis
Elevated CRP supports but does not confirm
Normal CRP does not exclude
Metabolic screening if unclear presentation
Serum glucose mmol/L for severe hyperglycemia symptoms
Marked hyperglycemia causing visual fluctuation
Not typical for curtain defect
Labs for surgical planning or hemorrhage risk
Bleeding risk evaluation
CBC for suspected vitreous hemorrhage
Hemoglobin level baseline
Platelet count if thrombocytopenia concern
INR for anticoagulant use
Warfarin effect assessment
Procedural planning context
Diabetes complications context
HbA1c for known diabetes
Chronic control indicator
Tractional detachment risk context
Point of care testing
Glucose capillary mmol/L if acute systemic symptoms
Hypoglycemia alternate neurologic symptoms
Hyperglycemia causing blurred vision
Pitfalls and limitations
Lab limitations
No lab test rules out retinal detachment
Normal labs do not reduce urgency if classic symptoms
Diagnostic Tests
Scoring Systems
Clinical classification and prognostic stratification
Macula status
Macula-on
Macula-off
Proliferative vitreoretinopathy grading
Grade A vitreous haze and pigment
Grade B wrinkling and rolled edges
Grade C full thickness retinal folds
Detachment characteristics
Extent in clock hours
Superior versus inferior
Bullous versus shallow
MRI
MRI roles
Orbital MRI indications
Suspected intraocular tumor with exudative detachment
Atypical inflammatory presentations
Contraindications and limitations
Delay of definitive ophthalmic evaluation
Limited utility for typical rhegmatogenous detachment
CT
CT roles
CT orbit indications
Suspected orbital fracture
Intraocular foreign body
Limitations
Poor sensitivity for retinal detachment compared with fundus exam or ultrasound
Radiation exposure
Ultrasound
Ocular ultrasound approach
Indications
Limited fundus view
Vitreous hemorrhage
Technique basics
High frequency linear probe
Copious gel with minimal pressure
Key sonographic patterns
Retinal detachment
Taut echogenic membrane tethered at optic disc
Limited undulating motion
Vitreous detachment
Mobile undulating membrane
Not tethered at optic disc
Vitreous hemorrhage
Low level echoes swirling with eye movement
Accuracy notes
High sensitivity and specificity in ED studies for rhegmatogenous detachment
Operator dependent performance
Safety cautions
Avoid ultrasound if open globe suspected
Avoid pressure in severe trauma
Disposition
Level of care and timing
Emergency ophthalmology pathway
Same day ophthalmology assessment
Suspected retinal detachment
Suspected retinal tear
Immediate transfer to facility with vitreoretinal surgery capability
Macula-on suspected
Rapidly progressing field loss
Admission considerations
Inability to obtain timely ophthalmology evaluation
Observation for expedited consult
Transfer coordination
Severe trauma
Multisystem injuries
Open globe concern
Discharge criteria
Limited discharge scenarios
Ophthalmology evaluated and detachment excluded
Clear alternate diagnosis established
Return precautions documented
Ophthalmology plan in place with urgent clinic next day
Reliable follow up
Stable symptoms
Follow up
Follow up planning
Retina specialist timing
Macula-on within 24 hours
Macula-off within 72 hours or per specialist
Activity restrictions until evaluated
Avoid heavy lifting
Avoid contact sports
Treatment
Immediate management
Protective and behavioral measures
Eye shield if trauma or unclear integrity
Rigid shield
No patch pressure
Activity restriction
Avoid Valsalva
Avoid heavy exertion
Positioning guidance pending specialist input
Supine avoidance if gas bubble anticipated
Head positioning based on suspected tear location when advised
Symptom control
Ondansetron ODT 4 mg
Repeat every 8 hours as needed
QT prolongation risk consideration
Metoclopramide 10 mg PO or IV
Repeat every 6 to 8 hours as needed
Extrapyramidal symptoms risk
Acetaminophen 1000 mg PO
Repeat every 6 hours as needed
Maximum 4000 mg per 24 hours
Definitive ophthalmic interventions
Retinal tear prophylaxis
Laser retinopexy
Indication
Symptomatic retinal tear
High risk lattice with tear
Goal
Chorioretinal adhesion to prevent detachment
Cryotherapy
Indication
Poor view for laser
Peripheral tear inaccessible to laser
Retinal detachment repair options
Pneumatic retinopexy
Typical selection
Superior breaks
Limited detachment extent
Post procedure requirements
Strict head positioning
Follow up within 24 hours
Scleral buckle
Typical selection
Phakic patients with anterior breaks
Multiple tears
Complication awareness
Refractive change
Infection rare
Pars plana vitrectomy
Typical selection
Pseudophakia
Posterior breaks
Proliferative vitreoretinopathy
Tamponade agents
Gas
Flight prohibition until gas resorbed
Nitrous oxide anesthesia contraindicated
Silicone oil
Later removal common
Evidence and guideline notes
Time sensitivity principles
Macula-on outcomes better with prompt repair
Urgent repair commonly recommended within 24 hours
Visual acuity preservation goal
Macula-off timing
Earlier repair associated with better visual recovery
Specialist dependent time window
Recommendation framing
Preferred Practice Pattern guidance supports urgent ophthalmology evaluation
Level B style recommendation based on observational evidence
Level C style recommendation for ED ultrasound use when fundus view limited
Class IIa style recommendation
Urgent vitreoretinal consultation for suspected macula-on detachment
Class IIb style recommendation
Ocular POCUS as adjunct when immediate ophthalmoscopy unavailable
Contraindications and cautions
Avoidance items
Topical pressure patching
Risk of worsening detachment discomfort
Contraindicated if open globe possible
Mydriatic drops without trauma assessment
Caution in narrow angles
Caution in suspected open globe
Ultrasound if open globe suspected
Risk from pressure
Alternative imaging and urgent ophthalmology
Special Populations
Pregnancy
Pregnancy considerations
Diagnostic approach
Fundus examination preferred
Ocular ultrasound preferred if view limited
Medication safety
Acetaminophen preferred analgesic
Ondansetron use based on risk benefit discussion
Surgical considerations
Urgency based on macula status
Anesthesia planning with obstetrics as needed
Geriatric
Geriatric considerations
Higher posterior vitreous detachment prevalence
Higher tear risk with new flashes
Cataract surgery history common
Anticoagulation
Vitreous hemorrhage more likely to obscure exam
INR relevance for procedural planning
Alternate diagnoses
Giant cell arteritis screening when appropriate
Vascular occlusion risk higher
Pediatrics
Pediatric considerations
Etiologies
Trauma common
Retinopathy of prematurity related traction
Examination challenges
Sedation needs for complete retinal exam
Guarded ultrasound use with minimal pressure
Safety and safeguarding
Non accidental trauma consideration with inconsistent history
Child protection pathway as indicated
Background
Epidemiology
Epidemiology overview
Incidence patterns
Rhegmatogenous detachment most common type
Risk increases with age
Major risk factors prevalence
High myopia association
Prior cataract surgery association
Fellow eye risk
Increased lifetime risk after detachment in one eye
Need for long term follow up
Pathophysiology
Pathophysiology concepts
Rhegmatogenous mechanism
Retinal break allowing fluid under neurosensory retina
Posterior vitreous detachment traction role
Tractional mechanism
Fibrovascular membranes pulling retina off
Diabetic proliferative disease association
Exudative mechanism
Fluid accumulation without break
Inflammation or tumor association
Therapeutic Considerations
Therapeutic principles
Macula status and time dependence
Macula-on preservation priority
Macula-off recovery decreases with delay
Repair strategy selection
Break location and number
Lens status
Proliferative vitreoretinopathy presence
Post repair constraints
Head positioning requirements
Flight and nitrous oxide restrictions with intraocular gas
Patient Discharge Instructions
Copy discharge instructions
Discharge instructions for suspected or confirmed retinal detachment plan
Urgent ophthalmology follow up timing
Same day or next day as arranged
Do not miss appointment
Activity restrictions
Avoid heavy lifting
Avoid straining
Avoid contact sports
Eye protection
Keep eye shield on if provided
Do not rub the eye
Return to ED now
Worsening vision
New curtain or shadow
Increasing flashes or sudden shower of floaters
New severe eye pain or severe headache with nausea
New neurologic symptoms
If intraocular gas placed later
No flights until cleared
No nitrous oxide anesthesia until cleared
References
Clinical guidelines and evidence sources
Professional guidance
American Academy of Ophthalmology Preferred Practice Pattern on rhegmatogenous retinal detachment
Urgent evaluation for flashes floaters with field defect
Emphasis on macula status for timing
Royal College of Ophthalmologists guidance on retinal detachment and retinal tears
Referral urgency based on symptoms and macula involvement
Post treatment precautions for intraocular gas
Evidence for ultrasound
Emergency department ocular ultrasound studies for retinal detachment diagnosis
High sensitivity reported across multiple observational cohorts
Operator training affects performance
Foundational concepts
Standard ophthalmology texts on retinal tear and detachment mechanisms
Posterior vitreous detachment association
Proliferative vitreoretinopathy as surgical failure risk
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