Atlas of Ophthalmology

Pseudo Doubling of Optic Nerve Head by Partial Filling of Vitreal Cavity with SF6 gas (Colour Photography)

Pseudo Doubling of Optic Nerve Head by Partial Filling of Vitreal Cavity with SF6 gas (Colour Photography)
Patient: 45 years of age, male; BCVA +1.0-2.0/5°=0.7; IOP 18 mmHg. Ocular Medical History: retinal detachment after ocular trauma, intraoperative use of sulfur hexafluoride (SF6) gas to provide a gas bubble for intraocular tamponade ten days ago. General Medical History: empty Purpose: to show an intraocular mirror effect by the surface of the resting gas bubble for intraocular tamponade. Findings: Colour Photography: 10 days after surgery with intraoperative use of sulfur hexafluoride (SF6) gas the surface of the resting gas bubble produces a mirror (arrow), generating a second image of the optic nerve head (*). Discussion: Gas mixtures are often used in vitrectomy surgery to tamponade the retina. In 1973, Norton proposed the use of sulfur hexafluoride (SF6) gas to provide a longer-acting gas bubble for intraocular tamponade. Pure SF6 gas expands to 1.9–2.0 times its original size because oxygen and nitrogen from the blood enter the gas bubble more rapidly than SF6 can leave the bubble. The most rapid expansion occurs over the first 6–8 hours, and maximal expansion is reached at around 24 hours. SF6 lasts in the eye for 10–14 days. Literature: Norton EW. Intraocular gas in the management of selected retinal detachments. Trans Am Acad Ophthalmol Otolaryngol. 1973;77:OP85–OP98.
Knorr, Harald, Dr.med., Augenklinik, Universität Erlangen-Nürnberg, Erlangen, Deutschland; Kaldefoss, Kristina, Dr.med., Augenklinik, Friedrich-Alexander-Universität Erlangen-Nürnberg , Erlangen, Deutschland; Michelson, Georg, Prof. Dr. med., Interdisziplinäres Zentrum für augenheilkundliche Präventivmedizin und Imaging, Augenklinik, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Deutschland
H43.3
العصب البصري -> حالات جراحية وتالية للجراحة -> Pseudo Doubling of Optic Nerve Head by Partial Filling of Vitreal Cavity with SF6 gas (Colour Photography, Fundus)
Mirroring, pseudopapilla
9431
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