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Related Experiment Videos

Retinal tolerance to dyes.

C Lüke1, M Lüke, T S Dietlein

  • 1Center of Ophthalmology, University of Cologne, Germany. aia18@uni-koeln.de

The British Journal of Ophthalmology
|August 23, 2005
PubMed
Summary
This summary is machine-generated.

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Indocyanine green and patent blue dyes show minimal retinal toxicity, unlike trypan blue, which causes significant damage even with short exposure. Safe intraocular use of ICG and PB is possible with careful application.

Area of Science:

  • Ophthalmology
  • Retinal Surgery
  • Ophthalmic Dyes

Background:

  • Intraoperative dyes like indocyanine green (ICG), trypan blue (TB), and patent blue (PB) aid visualization of epiretinal membranes and internal limiting membrane during surgery.
  • Understanding the retinal toxicity of these vital surgical dyes is crucial for patient safety.

Purpose of the Study:

  • To investigate the functional effects of ICG (0.05%), TB (0.15%), and PB (0.48%) on bovine retinal tissue.
  • To determine the reversibility of retinal functional changes induced by these dyes.

Main Methods:

  • Bovine retinal preparations underwent electroretinogram (ERG) recording.
  • Retinal exposure to dye solutions (ICG, TB, PB) varied from 10 seconds to 2 minutes.
  • Post-exposure reperfusion allowed assessment of b-wave amplitude reduction and reversibility.

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Main Results:

  • All tested dyes reduced ERG b-wave amplitude.
  • PB and ICG effects were reversible after 60 and 30 seconds of exposure, respectively.
  • TB caused irreversible b-wave loss with exposure of 15 seconds or longer.

Conclusions:

  • Trypan blue exhibits significant retinal toxicity, necessitating limited intraocular use.
  • Indocyanine green and patent blue appear safe for intraocular application when used judiciously regarding concentration and exposure time.