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An Ex Vivo Choroid Sprouting Assay of Ocular Microvascular Angiogenesis
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Choroidal expansion during the water drinking test.

Carlos Gustavo Vasconcelos De Moraes1, Alexandre Soares Castro Reis, Adhele Furlani de Sá Cavalcante

  • 1Glaucoma Service, Department of Ophthalmology, University of Sao Paulo School of Medicine, Sao Paulo, SP, Brazil. gustavousp@gmail.com

Graefe'S Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Fur Klinische Und Experimentelle Ophthalmologie
|November 7, 2008
PubMed
Summary
This summary is machine-generated.

The water drinking test (WDT) significantly increases intraocular pressure (IOP), ocular pulse amplitude (OPA), and choroidal thickness (ChT). OPA and ChT rise before IOP, suggesting hemodynamic forces contribute to IOP elevation.

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Area of Science:

  • Ophthalmology
  • Glaucoma Research
  • Ocular Physiology

Background:

  • The water drinking test (WDT) is a provocative test used to assess intraocular pressure (IOP) dynamics.
  • Understanding the interplay between IOP, ocular pulse amplitude (OPA), and choroidal thickness (ChT) is crucial in glaucoma management.

Purpose of the Study:

  • To investigate the correlation between IOP changes, OPA, and ChT during the WDT.
  • To explore the physiological mechanisms underlying IOP elevation in response to the WDT.

Main Methods:

  • Primary open-angle glaucoma (POAG) patients underwent the WDT with serial IOP measurements (DCT, GAT) and ChT assessments (USG).
  • A control group was evaluated for measurement reproducibility.
  • Spearman's correlation coefficient was used to analyze the relationship between variables.

Main Results:

  • The WDT induced significant increases in IOP, OPA, and ChT (p < 0.001).
  • A moderate, significant correlation was found between OPA and ChT (rho = 0.40, p = 0.005).
  • Increases in OPA and ChT preceded the rise in IOP by approximately 15 minutes.

Conclusions:

  • The WDT causes a significant increase in OPA and ChT, followed by an IOP rise.
  • Hemodynamic changes leading to increased choroidal volume may play a role in IOP elevation during the WDT.