97th DOG Annual Meeting 1999



D. C. Zeana, N. F. Schrage, C. Dahlke, S. Wolf, B. Kirchhof

The aim of the study was to test the potency of perfluorohexyloctane, C14F13H17 (F6H8) - a semifluorinated alkane that can be dissolved in silicone oil - in flattening detached retina and in removing droplets of silicone oil left in the eye from former surgery, respectively.

Patients and Methods: We used F6H8 in 20 eyes intraoperatively. In 10 eyes with complicated retinal detachments F6H8 was used to flatten the retina. At the end of the surgery, F6H8 was exchanged in 7 eyes with silicone oil and in 3 eyes with SF6 20%. In other ten eyes F6H8 was used to dissolve silicone oil remnants from intraocular lenses (IOL) or vitreous cavity.

Results: In 7 eyes the retina could be easily flattened with F6H8. In other 3 eyes a supplementary retinotomy was necessary before the retina was completely flattened. Using F6H8, remnants of silicone oil could be removed from IOL (6 cases) and from vitreous cavity (4 cases). In only one case a second operation had to be done due to new formation of droplets of silicone oil upon a silicone lens.

Discussion: Due to its lower specific weight (1,35 g/cm3) F6H8 seems to be of some advantage compared to perfluorocarbon liquids since minor residual traction can be detected more easily. F6H8 proved to be a useful intraoperative tool to remove remnants of silicone oil, especially on silicone intraocular lenses. However, despite thorough rinsing with F6H8, silicone oil droplets can remain in the ciliary body crypts and can reattach on intraocular lenses later causing visual disturbances for the patients.

Augenklinik der Med. Fak. der RWTH Aachen, Pauwelsstr. 30, D - 52057 Aachen