Deep anterior lamellar keratoplasty with dehydrated, 4 °C-stored, and rehydrated lenticules. 2011

Paolo Bonci, and Vincenzo Della Valle, and Paola Bonci, and Roberto Lodi, and Alessandra Russo
Department of Ophthalmology, S. Maria della Scaletta Hospital, Imola, Bologna, Italy.

OBJECTIVE To retrospectively evaluate the outcomes of 124 consecutive deep anterior lamellar keratoplasties (DALK) performed by using dehydrated, 4 °C stored, and rehydrated lenticules. METHODS A total of 124 eyes of 109 patients, which had undergone DALK from August 11, 2000, to December 13, 2007, were included in our retrospective study; 88 cases were male and 36 female, with a mean age of 39.45±15.52 years (range 6-85). A total of 109 (87.9%) had keratoconus, 7 (5.6%) had deep or superficial corneal scar, 3 (2.4%) had epikeratophakia, 3 (2.4%) had pellucid degeneration, 1 (0.8%) a malignant pterygium, and 1 (0.8%) had a severe alkali burn. All the patients underwent ophthalmic examinations, including best-corrected visual acuity (BCVA), central ultrasound pachymetry, computerized topography, specular microscope endothelial cell count, and confocal microscopy. RESULTS The mean follow-up was 23.9±3.4 months. The mean preoperative BCVA was 0.16±0.18; the postoperative BCVA was 0.68±0.20 after 2 years. The mean preoperative central corneal thickness (CCT) was 439.4±10.5 µm; after 2 years, it was 532.1±9.7 µm. The mean preoperative endothelial cell count (ECC) was 2301.3±180.2 cells/mm2; after 2 years it was 1986.0±169.5 with a decrease of 13.7%. Baring of Descemet membrane (DM) during DALK was achieved in 112 (90.32%) eyes; 4 eyes (3.26%) had a large perforation of the DM with consequent PK. Small intraoperative perforation of DM during DALK occurred in 18 cases (14.52%). CONCLUSIONS The results showed that the method of preservation and distribution of dehydrated, 4 °C stored, and rehydrated lenticules is safe, cheap, and simple. Furthermore, it does not appear to influence the outcomes of the DALK surgery.

UI MeSH Term Description Entries
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D009926 Organ Preservation The process by which organs are kept viable outside of the organism from which they were removed (i.e., kept from decay by means of a chemical agent, cooling, or a fluid substitute that mimics the natural state within the organism). Organ Preservations,Preservation, Organ,Preservations, Organ
D002452 Cell Count The number of CELLS of a specific kind, usually measured per unit volume or area of sample. Cell Density,Cell Number,Cell Counts,Cell Densities,Cell Numbers,Count, Cell,Counts, Cell,Densities, Cell,Density, Cell,Number, Cell,Numbers, Cell
D002648 Child A person 6 to 12 years of age. An individual 2 to 5 years old is CHILD, PRESCHOOL. Children
D003315 Cornea The transparent anterior portion of the fibrous coat of the eye consisting of five layers: stratified squamous CORNEAL EPITHELIUM; BOWMAN MEMBRANE; CORNEAL STROMA; DESCEMET MEMBRANE; and mesenchymal CORNEAL ENDOTHELIUM. It serves as the first refracting medium of the eye. It is structurally continuous with the SCLERA, avascular, receiving its nourishment by permeation through spaces between the lamellae, and is innervated by the ophthalmic division of the TRIGEMINAL NERVE via the ciliary nerves and those of the surrounding conjunctiva which together form plexuses. (Cline et al., Dictionary of Visual Science, 4th ed) Corneas
D003316 Corneal Diseases Diseases of the cornea. Corneal Disease,Disease, Corneal,Diseases, Corneal
D003890 Desiccation Removal of moisture from a substance (chemical, food, tissue, etc.). Dessication
D004728 Endothelium, Corneal Single layer of large flattened cells covering the surface of the cornea. Anterior Chamber Epithelium,Corneal Endothelium,Endothelium, Anterior Chamber,Epithelium, Anterior Chamber,Anterior Chamber Endothelium
D005260 Female Females

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