97th DOG Annual Meeting 1999

P158

COMPLICATIONS OF THE UNFOLDER IMPLANTATION SYSTEM DURING IMPLANTATION OF SILICONE INTRAOCULAR LENSES

S. Puls, B. Dick, O. Schwenn, N. Pfeiffer

The incidence of intraoperative complications during silicone intraocular lens (IOL) implantation with the Unfolder implantation system was investigated.

Material and methods: We retrospectively evaluated operation reports of 150 cataract surgeries with silicone IOL implantation (type SI-40NB or SA-40N, Allergan, Irvine). All injections were performed using the Unfolder implantation system. IOL type and power, as well as viscoelastic agent and kind of complication were analysed.

Results: 97 SI-40NB IOLs and 53 SA-40N IOLs were implanted. Five different viscoelastic agents were used. With the SA-40N IOL, a rupture in the haptic-optic-zone occured in three cases, while this complication did not occur with the SI-40NB IOL. In one case, a SI-40NB IOL pinched in the implantation system and another IOL had to be implanted. In all cases with a rupture in haptic-optic-junction-area, a hydroxypropylmethylcellulose-based viscoelastic agent (Adatocel®, Munich) was used. In the other complication, a hyaluronic-acid-based viscoelastic agent (Healon®, Pharmacia & Upjohn, Erlangen) was used. IOL power did not seem to influence complications. No cartridge crack was observed.

Conclusion: In 97.3%, implantation of silicone IOLs with the Unfolder implantation system succeded without any problem. A possible influence of IOL power on the incidence of complications could not be observed because of the rareness of complicated implantations. The viscoelastic agent might influence the incidence of complications.

Johannes Gutenberg-University, Department of Ophthalmology, Langenbeckstr. 1, D-55101 Mainz, Germany


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