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Effects of patent blue on human retinal function
1Center of Ophthalmology, University of Cologne, Cologne, Germany. aia18@uni-koeln.de
Summary
Patent blue dye can affect human retinal function, causing reversible changes in electroretinogram (ERG) b-wave amplitude with longer exposure. Short-term use of patent blue during surgery appears safe for retinal function.
Area of Science:
- Ophthalmology
- Retinal Physiology
- Surgical Staining Agents
Background:
- Intraoperative dyes like patent blue enhance visualization of epiretinal membranes and internal limiting membrane during surgery.
- Patent blue is a proposed alternative for internal limiting membrane staining in macular hole surgery.
Purpose of the Study:
- To investigate the effects of 0.48% patent blue on human retinal function.
- To assess the safety of patent blue for intraoperative use.
Main Methods:
- Isolated human retina preparations were used.
- Electroretinograms (ERGs) were recorded before and after perfusion with patent blue.
- Retinal exposure duration to patent blue varied from 15 seconds to 4 minutes.
Main Results:
- No ERG effects observed at 15 and 30 seconds of dye exposure.
- Reversible b-wave amplitude reductions occurred after 60 and 120 seconds of patent blue exposure.
- A persistent 40% b-wave reduction was noted after 4 minutes of exposure.
Conclusions:
- Patent blue impacts human retinal function after 1 minute of exposure.
- No irreversible ERG damage was observed even after 2 minutes of exposure.
- Short-term intraoperative application of patent blue 0.48% likely poses no toxic risk to retinal function.