Abstract
Background. To investigate the potential of an Er:YAG laser for precise and tractionfree removal of retinal layers in vitro. Material and methods. Retinal ablation in porcine retinal explants was performed using a free running Er:YAG laser focused either into a low-OH quarz fiber or a sapphire fiber. The explants were treated under air or perfluorodecaline (PFD). The ablation depth was evaluated by optical coherence tomography (OCT) and histology sections. Results. A radiant exposure of 5.0 J/cm2 under air and PFD resulted in complete transsection of the neurosensory retina. Between 3.5 and 2.0 J/cm2 the ablation depth and the defect patterns varied markedly and adjacent thermal zones areas were seen. Below 2.0 J/cm2 no defects could be created in air, whereas under PFD the ablation extended into the ganglion cell layer. Ablations using a sapphire fiber and 2.0 J/cm2 showed a significantly higher reproducibility of ablation depth, and homogeneous defect patterns limited to the nerve fiber layer could be produced without thermal damage. Conclusions. The Er:YAG laser system with a low-OH quarz fiber allowed ablation of inner retinal layers in vitro, but revealed a variable ablation depth and low reproducibility. However, a sapphire fiber showed markedly improved results. Therefore its use during vitreoretinal surgery seems possible not only as a cutting device but also as a tool for the ablation of fine retinal structures.
| Translated title of the contribution | Retinal photoablation with the Erbium: YAG laser. Initial experimental results for traction-free removal of tissue |
|---|---|
| Original language | German |
| Journal | Ophthalmologe |
| Volume | 100 |
| Issue number | 2 |
| Pages (from-to) | 115-121 |
| Number of pages | 7 |
| ISSN | 0941-293X |
| DOIs | |
| Publication status | Published - 01.02.2003 |
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 9 Industry, Innovation, and Infrastructure
Research Areas and Centers
- Academic Focus: Biomedical Engineering
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