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Corneal lamellar dissection by using suture threads in porcine eyes
Germán A Rocha1, Juan A Durán, Arantxa Acera
1Universidad Católica, Santiago, Chile.
Purpose:
Lamellar dissection is one of the most delicate maneuvers in corneal surgery. We describe a new method that uses Ferrara ring instrumentation.
Methods:
A 360 degrees tunnel is created at half of the stromal depth in porcine corneas. A suture (nylon 6-0 or Vicryl 6-0) was passed through the tunnel by using the Ferrara spatula. By means of alternate traction on the end of the suture thread, complete lamellar dissection was achieved.
Results:
Light microscopy examination of the cornea confirmed that the dissection had a constant thickness and dissection depth. Scanning electron microscopy showed a homogeneous stromal surface without irregularities.
Conclusions:
This technique permits a homogeneous and safe lamellar dissection, which may prove useful in specific surgical procedures of the cornea.
