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Expulsive choroidal haemorrhage: an experimental study

H Zauberman

    The British Journal of Ophthalmology
    |January 1, 1982
    PubMed
    Summary
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    Elevated intraocular pressure in rabbits after vortex vein closure indicates impaired venous outflow. This condition can lead to iris prolapse or severe choroidal hemorrhage following limbal wounds.

    Area of Science:

    • Ophthalmology
    • Vascular Biology
    • Intraocular Pressure Dynamics

    Background:

    • Vortex veins are crucial for ocular venous drainage.
    • Impairment of vortex veins can lead to elevated intraocular pressure.
    • Understanding the consequences of impaired venous outflow is vital for ocular health.

    Purpose of the Study:

    • To investigate the effects of vortex vein closure on intraocular pressure (IOP) in rabbits.
    • To examine the ocular response to limbal wounds after inducing elevated IOP.
    • To explore the potential link between impaired venous outflow and expulsive hemorrhage.

    Main Methods:

    • Surgical closure of two or more vortex veins in rabbit eyes.
    • Creation of small and large limbal wounds to access the anterior chamber.

    Related Experiment Videos

  • Observation and documentation of IOP changes, iris prolapse, and choroidal hemorrhage.

    • Main Results:

    • Vortex vein closure consistently resulted in a persistent rise in intraocular pressure.
    • Small limbal wounds led to iris prolapse.
    • Larger limbal wounds precipitated massive choroidal expulsive hemorrhage.
    • The experimental findings suggest a correlation between IOP elevation and severe ocular complications.

    Conclusions:

    • A sustained increase in intraocular pressure may signify compromised venous outflow.
    • Iris prolapse following a small limbal opening warrants careful funduscopic examination for choroidal complications.
    • These rabbit models provide insights into the mechanisms of expulsive hemorrhage in humans.