Aqueous humor dynamics in glaucomato-cyclitic crisis

Area of Science:

• Ophthalmology
• Human Physiology
• Fluid Dynamics

Background:

• Glaucomato-cyclitic crisis, also known as Posner-Schlossman syndrome, is characterized by recurrent episodes of elevated intraocular pressure.
• Understanding aqueous humor dynamics is crucial for managing glaucoma and related ocular conditions.
• Fluorescein transfer coefficients provide insights into the movement of substances within the anterior chamber.

Purpose of the Study:

• To calculate fluorescein transfer coefficients (kfa and kdpa) in individual human eyes.
• To investigate aqueous humor dynamics in patients experiencing glaucomato-cyclitic crisis.
• To compare these dynamics between the affected and fellow eyes, and during acute attacks versus remission phases.

Main Methods:

• Intravenous injection of fluorescein followed by analysis of fluorescein concentrations.
• Measurement of fluorescein concentrations in the anterior chamber, pupillary aqueous, and serum ultrafiltrates.
• Calculation of flow (kfa) and diffusion (kdpa) transfer coefficients for each eye.

Main Results:

• During glaucomato-cyclitic crisis attacks, transfer coefficients were significantly higher in the involved eye compared to the fellow eye (P < 0.05).
• During remission, the differences in transfer coefficients between the involved and fellow eyes were not statistically significant.
• In patients studied during both attack and remission, significant differences in transfer coefficients were observed in the involved eye between the two phases (P < 0.05).

Conclusions:

• Aqueous humor dynamics are significantly altered during glaucomato-cyclitic crisis attacks.
• The observed changes in transfer coefficients suggest impaired aqueous humor outflow during acute phases of the condition.
• These findings highlight the dynamic nature of ocular fluid balance in glaucomato-cyclitic crisis and its potential for recovery during remission.