[Mechanical dilatation of the pupil in phacoemulsification surgery: first experiences with the 6.25 mm Malyugin-ring].

Abstract

PURPOSE:

Inadequate mydriasis may cause major problems in phacoemulsification surgery. Usually 4 iris retractors are used to allow adequate pupillary dilatation. Implantation of a Malyugin ring to maintain a 6.25 mm pupil is a new alternative.

PATIENTS AND METHODS:

A Malyugin ring was used in 46 eyes of 39 patients (aged 80.1 ± 6.2 years). The ring is im- and explanted with a disposable shooter through the main incision. Indications for the use of the ring were inadequate mydriasis due to pseudoexfoliation (n = 27), intraoperative floppy iris syndrome (n = 5), the combination of PEX and IFIS (n = 11), extensive posterior synechiae (n = 2) or inadquate mydriasis after long-term pilocarpine treatment (n = 1).

RESULTS:

In 44/46 eyes phacoemulsification with implantation of foldable posterior chamber lens was performed without complications. In 2 eyes with massive phakodonesis an Artisan anterior chamber lens had to be implanted after anterior vitrectomy because of total zonulolysis. There where no complications associated to the use of the device and with increasing experience duration of implantation as well as explantation was reduced to 2 - 4.5 min (median 2:51 min).

CONCLUSIONS:

In cases of phacoemulsification surgery with inadequate mydriasis implantation of a Malyugin ring is a simple, safe and fast alternative to iris-retractors; it allows better pupil-size without additional stab incisions.

• Authors: J Stürmer, M Scherrer, N Lansel
• Journal: Klinische Monatsblatter fur Augenheilkunde (Klin Monbl Augenheilkd) Vol. 229 Issue 4 Pg. 365-8 (Apr 2012) ISSN: 1439-3999 [Electronic] Germany
• Vernacular Title: Mechanische Pupillenerweiterung zur Kataraktoperation: erste Erfahrungen mit dem 6,25 mm Malyugin-Ring.
• PMID: 22496005 (Publication Type: English Abstract, Journal Article)
• Copyright: © Georg Thieme Verlag KG Stuttgart · New York.

Topics

• Aged
• Aged, 80 and over
• Dilatation (instrumentation, methods)
• Equipment Design
• Equipment Failure Analysis
• Female
• Humans
• Male
• Phacoemulsification (methods)
• Pilot Projects
• Pupil
• Treatment Outcome