Comparación de tres métodos de inducción del incremento crónico de la presión intraocular en el cerdo (glaucoma experimental)

  1. J Ruiz-Ederra
  2. M García
  3. F Martín
  4. H Urcola
  5. M Hernández
  6. J Araiz
  7. J Durán
  8. E Vecino
Revue:
Archivos de la Sociedad Española de Oftalmologia

ISSN: 0365-6691

Année de publication: 2005

Volumen: 80

Número: 10

Pages: 571-579

Type: Article

DOI: 10.4321/S0365-66912005001000004 DIALNET GOOGLE SCHOLAR lock_openAccès ouvert editor

D'autres publications dans: Archivos de la Sociedad Española de Oftalmologia

Résumé

Purpose: To compare three methods of inducing experimental glaucoma in the adult pig, based on achieving chronic elevation of the intraocular pressure (IOP). Methods: A total of 16 adult pigs were used in the present study. In all instances, the right eye was used as control and the left eye as the experimental eye. The animals were divided into three groups: 1) 3 pigs in which 3 episcleral veins were cauterized (experimental period = 21 weeks); 2) 6 animals in which the anterior chamber of the eye was injected with a solution containing latex fluorospheres (experimental period = 11 weeks); and 3) 4 pigs in which the anterior chamber of the eye was injected with a solution containing latex fluorospheres plus methylcellulose (experimental period = 11 weeks). Results: The episcleral vein cauterization was the only method which produced a sustained elevation of the IOP throughout most of the experimental period. Moreover, the elevation of the IOP achieved by this method resulted in selective retinal ganglion cell (RGC) loss that affected mainly the mid-peripheral and peripheral retina and caused an increase in the mean soma area of the remaining RGCs. Conclusions: Cauterization of the episcleral veins resulted in a significant and sustained elevation of the IOP and RGC loss when compared with the other two approaches tested in the present study, which barely modified the pig's RGC distribution. Thus, we conclude that the episcleral vein cauterization is the best of the methods tested to induce experimental glaucoma in the pig.

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