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Radial optic neurotomy in the porcine eye without retinal vein occlusion.

Publication ,  Journal Article
Czajka, MP; Cummings, TJ; McCuen, BW; Toth, CA; Nguyen, H; Fekrat, S
Published in: Arch Ophthalmol
August 2004

OBJECTIVE: To demonstrate the histopathologic changes in the porcine eye without retinal vein occlusion after radial optic neurotomy (RON). METHODS: A RON was performed in 14 normal eyes of 12 Yorkshire Cross pigs. One radial stab incision at the edge of the nasal optic nerve head was made using a 20-gauge microvitreoretinal blade (Visitec) while the intraocular pressure was elevated. Surgery was concluded when hemostasis was achieved. Weekly ophthalmoscopic examinations were performed. Group 1 eyes (4 eyes of 2 pigs) were enucleated at the end of surgery. Group 2 eyes (4 eyes of 4 pigs) were enucleated 1 week postoperatively, and group 3 eyes (4 eyes of 4 pigs) were enucleated 3 weeks postoperatively. In group 4 (2 eyes of 2 pigs), animals underwent vitrectomy and RON, and eyes were enucleated 3 weeks postoperatively. RESULTS: Ophthalmoscopic examination demonstrated engorged blood vessels at the RON site up to 3 weeks after surgery with minimal or no hemorrhage. Histological examination of the optic nerve demonstrated foci of hemorrhage, interstitial edema, reactive gliosis, and rare inflammatory cells. At 3 weeks, there was complete axonal nerve fiber loss distal to the neurotomy site. CONCLUSIONS: After RON, marked gliosis and complete axonal nerve fiber loss occur at the neurotomy site. Although bleeding was rare intraoperatively in this porcine model, hemorrhage and interstitial edema were present within the optic nerve at the neurotomy site histologically. Clinical Relevance Radial optic neurotomy remains a controversial method of treatment for central retinal vein occlusion. To our knowledge, this is the first study in the literature describing the histopathologic findings after RON.

Duke Scholars

Published In

Arch Ophthalmol

DOI

ISSN

0003-9950

Publication Date

August 2004

Volume

122

Issue

8

Start / End Page

1185 / 1189

Location

United States

Related Subject Headings

  • Swine
  • Retinal Vein Occlusion
  • Retinal Hemorrhage
  • Optic Nerve
  • Optic Disk
  • Ophthalmoscopy
  • Ophthalmology & Optometry
  • Ophthalmologic Surgical Procedures
  • Neurofilament Proteins
  • Intraocular Pressure
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Czajka, M. P., Cummings, T. J., McCuen, B. W., Toth, C. A., Nguyen, H., & Fekrat, S. (2004). Radial optic neurotomy in the porcine eye without retinal vein occlusion. Arch Ophthalmol, 122(8), 1185–1189. https://doi.org/10.1001/archopht.122.8.1185
Czajka, Marcin P., Thomas J. Cummings, Brooks W. McCuen, Cynthia A. Toth, Hoang Nguyen, and Sharon Fekrat. “Radial optic neurotomy in the porcine eye without retinal vein occlusion.Arch Ophthalmol 122, no. 8 (August 2004): 1185–89. https://doi.org/10.1001/archopht.122.8.1185.
Czajka MP, Cummings TJ, McCuen BW, Toth CA, Nguyen H, Fekrat S. Radial optic neurotomy in the porcine eye without retinal vein occlusion. Arch Ophthalmol. 2004 Aug;122(8):1185–9.
Czajka, Marcin P., et al. “Radial optic neurotomy in the porcine eye without retinal vein occlusion.Arch Ophthalmol, vol. 122, no. 8, Aug. 2004, pp. 1185–89. Pubmed, doi:10.1001/archopht.122.8.1185.
Czajka MP, Cummings TJ, McCuen BW, Toth CA, Nguyen H, Fekrat S. Radial optic neurotomy in the porcine eye without retinal vein occlusion. Arch Ophthalmol. 2004 Aug;122(8):1185–1189.

Published In

Arch Ophthalmol

DOI

ISSN

0003-9950

Publication Date

August 2004

Volume

122

Issue

8

Start / End Page

1185 / 1189

Location

United States

Related Subject Headings

  • Swine
  • Retinal Vein Occlusion
  • Retinal Hemorrhage
  • Optic Nerve
  • Optic Disk
  • Ophthalmoscopy
  • Ophthalmology & Optometry
  • Ophthalmologic Surgical Procedures
  • Neurofilament Proteins
  • Intraocular Pressure