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[Corneal markers for continuous keratoplasty sutures]
1Klinik für Ophthalmologie der Universität Kiel.
Klinische Monatsblatter Fur Augenheilkunde
|July 1, 1995
Summary
A novel corneal marking device aids in precise trephine centering and double running sutures during penetrating keratoplasty. This technique resulted in a mean postoperative astigmatism of 2.0 dpt in 35 cases.
Area of Science:
- Ophthalmology
- Corneal Surgery
- Surgical Instrumentation
Context:
- Postoperative astigmatism is influenced by wound edge adaptation, trephination method, and suture techniques in penetrating keratoplasty.
- Accurate graft-host apposition and suture placement are critical for visual outcomes.
- Existing methods may lack precision in centering the trephine and executing complex suture patterns.
Purpose:
- To introduce and evaluate a new 8-bite star-shaped corneal marking device for keratoplasty and epikeratophakia.
- To assess the device's utility in centering the trephine and facilitating a precise double running torque antitorque suture.
- To determine the impact of this marking device on postoperative astigmatism.
Summary:
- The star-shaped marker is stained and imprinted onto the cornea, with its crosshairs aligned to the optical center.
- After initial trephination and graft fixation, the marker is used to imprint an 8-bite star pattern for precise suture placement.
- A double continuous suture technique, guided by the imprinted pattern, was employed in 35 penetrating keratoplasty procedures.
Impact:
- The use of the new marking device in 35 penetrating keratoplasty procedures resulted in a mean postoperative astigmatism of 2.0 +/- 0.75 diopters.
- The device aids in achieving accurate graft centering and consistent suture placement, potentially reducing induced astigmatism.
- Further prospective, randomized studies are needed to definitively establish the value of this surgical instrument compared to different suture techniques.