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Related Experiment Videos

Fluorescein oropharyngoscopy

A Flach

    American Journal of Ophthalmology
    |December 1, 1976
    PubMed
    Summary
    This summary is machine-generated.

    This study shows that fluorescein can assess lacrimal system patency. Normal patients show fluorescein within 30 minutes, while blocked ducts show none, aiding in diagnosing nasolacrimal duct obstruction.

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    Area of Science:

    • Ophthalmology
    • Anatomy

    Background:

    • Assessing the patency of the lacrimal drainage system is crucial for diagnosing various ocular conditions.
    • Traditional methods can be invasive or time-consuming.

    Observation:

    • Fluorescein dye was instilled into the conjunctival cul-de-sac of patients.
    • The posterior oropharynx was subsequently examined under ultraviolet light.

    Findings:

    • In healthy individuals, fluorescein appeared in the oropharynx within 1 to 30 minutes, indicating normal lacrimal drainage.
    • Complete nasolacrimal duct blockage prevented fluorescein detection in the oropharynx even after two hours.

    Implications:

    • This fluorescein-based method offers a simple, non-invasive technique for evaluating lacrimal system patency.
  • It can effectively differentiate between normal and obstructed nasolacrimal drainage pathways.