[Angiography by the oral route using enteric-coated capsules]

Area of Science:

• Ophthalmology
• Pharmacology
• Medical Imaging

Background:

• Retinal fluorescein angiography is a key diagnostic tool in ophthalmology.
• Optimizing dye delivery is crucial for image quality and diagnostic accuracy.
• Different formulations of fluorescein may impact plasma levels and imaging outcomes.

Purpose of the Study:

• To compare the effectiveness of different fluorescein administration routes for retinal fluorescein angiography.
• To evaluate dye plasma levels and resultant image quality based on fluorescein formulation.
• To determine the optimal fluorescein formulation for high-quality retinal angiograms.

Main Methods:

• Retinal fluorescein angiograms were performed on three patient groups.
• Groups received intravenous sodium fluorescein, oral hard gelatin-coated capsules, or oral enteric-coated capsules.
• Dye plasma levels were monitored and correlated with angiogram quality.

Main Results:

• Enteric-coated fluorescein capsules achieved effective dye plasma levels for angiography.
• Optimal imaging was achieved between 40 and 60 minutes post-administration with enteric-coated capsules.
• Retinal images from the enteric-coated capsule group exhibited significantly greater sharpness and quality.

Conclusions:

• Enteric-coated fluorescein capsules are a viable and effective option for retinal fluorescein angiography.
• This formulation provides superior image quality compared to hard gelatin-coated capsules.
• Enteric-coated fluorescein enables high-definition retinal imaging with improved diagnostic potential.