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Perforierende Keratoplastik mit intrastromalem Hornhautring

Eine prospektive randomisierte Studie

Penetrating keratoplasty with intrastromal corneal ring

A prospective randomized study

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Zusammenfassung

Hintergrund

Ziel dieser Studie war der Nachweis der Sicherheit und Effektivität des intrastromalen Hornhautringes nach Krumeich bei perforierender Keratoplastik. Das Hauptzielkriterium war der postoperative Astigmatismus.

Material und Methoden

Es wurden insgesamt 20 Patienten in diese Studie eingeschlossen (randomisiert 10 Patienten mit Ring; 10 Patienten ohne Ring). Bei den Nachkontrollen wurde neben Bestimmung des bestkorrigierten Visus jeweils eine Orbscan-Hornhaut-Topographie durchgeführt.

Ergebnisse

Die mittlere Nachbeobachtungszeit beträgt derzeit 18,9±2,8 Monate. Der mittlere Astigmatismus (im Orbscan) beträgt 3,9 dpt in der Gruppe mit Hornhautring und 4,0 dpt in der Gruppe ohne Ring. Bei 5 Patienten mit Hornhautring kam es zu spontanen Fadenrupturen.

Schlussfolgerungen

In dieser Studie zeigte die Verwendung des intrastromalen Hornhautringes mit teilweise noch liegenden fortlaufenden Nähten keine Minderung des postoperativen Astigmatismus. Die Ursache für die spontanen Fadenrupturen ist unklar.

Abstract

Background

The purpose of the study was to evaluate the efficacy and safety of Krumeichs’ intrastromal corneal ring following penetrating keratoplasty. Postoperative astigmatism and occurrence of complications were the main criteria of this study.

Material and methods

A total of 20 patients were included in this prospectively randomized study (10 patients with and 10 patients without corneal ring). Follow-up examinations were performed 6 weeks, 4, 12, and 18 months postoperatively, including best corrected visual acuity and Orbscan corneal topography.

Results

The mean follow-up time is currently 18.9±2.8 months. The mean astigmatism (Orbscan) is 3.9 D in the group with ring and 4.0 D in the group without a ring. Spontaneous suture rupture occurred in five patients with corneal ring.

Conclusions

The use of the intrastromal corneal ring following penetrating keratoplasty caused no reduction of postoperative astigmatism. The reason for the spontaneous suture ruptures is unclear.

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Authors and Affiliations

  1. Universitäts-Augenklinik Freiburg, Killianstraße 5, 79106, Freiburg, Deutschland

    F. Birnbaum, J. Schwartzkopff, D. Böhringer & T. Reinhard

Authors
  1. F. Birnbaum
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  2. J. Schwartzkopff
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  3. D. Böhringer
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  4. T. Reinhard
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Correspondence to F. Birnbaum.

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Birnbaum, F., Schwartzkopff, J., Böhringer, D. et al. Perforierende Keratoplastik mit intrastromalem Hornhautring. Ophthalmologe 105, 452–456 (2008). https://doi.org/10.1007/s00347-007-1623-9

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