Echographic localization of corticosteroids after periocular injection

Area of Science:

• Ophthalmology
• Ocular pharmacology

Background:

• Subtenon injections of repository corticosteroids are used for macular edema.
• The precise localization of these injections and its impact on therapeutic outcomes require further investigation.

Purpose of the Study:

• To determine the location of repository corticosteroid deposits after subtenon injection.
• To correlate the localization with the therapeutic response in patients with macular edema.

Main Methods:

• Utilized standardized A-scan and B-scan echography before and after subtenon injections.
• Compared corticosteroid localization in superior versus inferior temporal quadrants in 24 patients.

Main Results:

• Corticosteroid was deposited within the subtenon space over the macula in 11 of 24 (45.8%) cases.
• Therapeutic response, indicated by improved macular function, was observed.
• A potential relationship between corticosteroid proximity to the macula and treatment efficacy was noted.

Conclusions:

• The therapeutic response to repository corticosteroids for macular edema may depend on accurate placement near the macula.
• Suboptimal placement, distant from the target zone, might explain the lack of therapeutic response in some patients.