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M. Rivera, O. Baca, R. Velasco, L. Perdiz, A. Galicia, A. Babayan, C. Pecheco-Del-Valle; Evaluation of Interphase Donor-Receptor by Ultrasound Biomicroscopy in Patients After Penetrating Keratoplasty. Invest. Ophthalmol. Vis. Sci. 2007;48(13):4681.
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To evaluate the usefulness of ultrasound biomicroscopy (UBM) in describing the characteristics of the donator-receptor interphase after penetrating keratoplasty (PK).
Prospective, descriptive, transversal study, from July to October of 2006. We included patients with keratoconus or any other corneal pathology who underwent penetrating keratoplasty. We integrated two groups, which were classified: Group 1 ectasias and Group 2 any other corneal pathology, both with a period of at least 6 months of postoperative follow-up. Evaluation with UBM was performed in both groups at different clockwise meridians: MIII, MIX and MVI, through pictures and images in vivo with the ultrasound biomicroscope (Paradigm Medical Industries, Inc., Salt Lake City UT). We analyzed the donor-receptor junction in 3 main layers: epithelium, stroma and endothelial layers and we classified them in different patterns.
We included 14 eyes of 13 patients (9 male and 4 female) mean age 27 years old; forty-two pictures were obtained, twenty-seven in Group 1 and fifteen in Group 2. In the epithelium-stroma union, the vertical pattern was found more frequently (44.4%) followed by oblique pattern (33.3%) in Group 1. Oblique pattern in Group 2 was the most frequent pattern (46.6%) followed by the vertical pattern (40%). The linear pattern was the most common in the endothelial union in both groups, 51.85% in group 1 and 80% in Group 2, in second place the thickened pattern in group 1 and notch-like in group 2.
We propose a new classification of the donor-receptor interphase after PK by UBM with the following patterns: a) junction of epithelium and stroma; 1. Vertical, 2. Oblique and 3. hinge. B) endothelial junction: 1. step-like, 2.notch-like, 3. thickened, and 4.lineal.
Hospital Nuestra Señora de la Luz, IAP
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