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Perforating keratoplasty with an intracorneal ring
1Department of Ophthalmology, Martin-Luther Hospital, Bochum, Germany. jk@krumeich.ruhr.de
Cornea
|May 21, 1999
Summary
An intracorneal ring used in penetrating keratoplasty (PKP) shows promise in reducing postoperative corneal astigmatism. This surgical aid appears safe and effective for corneal transplantation, preventing donor button distortions.
Area of Science:
- Ophthalmology
- Corneal Surgery
- Biomaterials in Medicine
Background:
- Corneal astigmatism is a common complication following penetrating keratoplasty (PKP).
- Donor button distortions can arise from peripheral changes or suture tension during PKP.
- Novel surgical aids are needed to improve outcomes in corneal transplantation.
Purpose of the Study:
- To evaluate the clinical feasibility of an intracorneal ring device.
- To assess the efficacy of the ring in decreasing postoperative corneal astigmatism after PKP.
- To determine the safety and effectiveness of the intracorneal ring as an aid in keratoplasty.
Main Methods:
- A prospective study involving 15 patients undergoing 8-mm PKP.
- Utilized a steel alloy intracorneal ring and the Guided Trephine System for precise graft preparation.
- Employed a 10-0 nylon double-running suture to secure the donor button with the ring.
Main Results:
- Mean corneal astigmatism decreased post-surgery and remained relatively stable.
- Reepithelialization averaged 4 days; graft edema and Descemet's folds resolved in 80% by 14 days.
- One patient experienced an allergic reaction; four eyes required resuturing due to suture ruptures.
Conclusions:
- The intracorneal ring effectively prevented donor button distortions.
- The sutured intracorneal ring is a safe and effective adjunct for keratoplasty.
- Further multicenter studies are warranted to confirm findings in larger, diverse patient populations.