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Orbital apex syndrome — Clinical Guidelines

Overview

Orbital apex syndrome, often manifesting as orbital compartment syndrome, is a vision-threatening condition characterized by increased intraorbital pressure leading to optic nerve compression and potential irreversible blindness 1 3.

Diagnosis

Clinical Presentation: Headache, proptosis, pain, vision loss, nausea, and vomiting 3.

Imaging: CT and MRI to identify space-occupying lesions or emphysema 3 4.

Grading: Not explicitly detailed in provided abstracts; clinical severity often guides urgency of intervention 1 3.

Management

First-Line Treatment: Lateral canthotomy and cantholysis for emergent decompression 1 3 5.

Adjunctive Measures: Subconjunctival needle decompression for orbital emphysema 4.

Surgical Interventions: Transantral orbital decompression (Ogura technique) for severe cases 7.

Surgical Clipping: For orbital varices, use of vascular clips at the apex or within the orbit 6.

Special Populations

Pediatrics: Compressed air injury can affect children, requiring prompt needle decompression 4.

Comorbidities: No specific management differences noted for elderly or comorbid conditions in abstracts 3 5.

Key Recommendations

Perform lateral canthotomy and cantholysis promptly in suspected orbital compartment syndrome to prevent vision loss (Evidence: Strong 1 3).

Utilize low-cost, realistic simulation models to enhance trainee confidence in performing lateral canthotomy and cantholysis (Evidence: Moderate 1 2).

Consider subconjunctival needle decompression for orbital emphysema as a simple and effective technique (Evidence: Weak 4).

For orbital varices causing syndrome, surgical clipping may be effective; consult ophthalmologic expertise for optimal outcomes (Evidence: Weak 6).

Emergency physicians should be proficient in orbital decompression techniques due to the time-sensitive nature of the condition (Evidence: Expert opinion 5).

References

1 Wilde C, Memon S, Ah-Kye L, Milligan A, Pederson M, Timlin H. A Novel Simulation Model Significantly Improves Confidence in Canthotomy and Cantholysis Among Ophthalmology and Emergency Medicine Trainees. The Journal of emergency medicine 2023. link 2 Mendes M, Buchanan JA, Sande M, Moreira ME. An Easily Assembled, Low-Cost Model for Lateral Canthotomy Education. The Journal of emergency medicine 2021. link 3 Ma ST, Liao SL, Wei YH. Orbital Compartment Syndrome and Irreversible Blindness Related to Orbital Varix Thrombosis: A Case Report. The Journal of emergency medicine 2021. link 4 Akbari-Kamrani M, Akbari-Kamrani B, Tavakoli M. Urgent Subconjunctival Needle Decompression for Orbital Compartment Emphysema Caused by Compressed Air Injury. Annals of emergency medicine 2020. link 5 Nguyen MV. A Historical Perspective of Lateral Canthotomy and Its Adoption as an Emergency Medicine Procedure. The Journal of emergency medicine 2019. link 6 Beyer R, Levine MR, Sternberg I. Orbital varices: a surgical approach. Ophthalmic plastic and reconstructive surgery 1985. link 7 Baylis HI, Call NB, Shibata CS. The transantral orbital decompression (Ogura technique) as performed by the ophthalmologist: a series of 24 patients. Ophthalmology 1980. link35132-4)

Orbital apex syndrome