1. Nomogram for single-pass automated microkeratome graft preparation for ultrathin Descemet stripping automated endothelial keratoplasty
- Author
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Pablo Morales, Timoteo González-Cruces, Antonio Cano-Ortiz, Alberto Villarrubia, Vanesa Díaz Mesa, and Álvaro Sánchez-Ventosa
- Subjects
medicine.medical_specialty ,Single pass ,business.industry ,Endothelium, Corneal ,Tissue thickness ,Nomogram ,Descemet stripping automated endothelial keratoplasty ,Tissue Donors ,Corneal Diseases ,Nomograms ,Ophthalmology ,Corneal edema ,Microkeratome ,Humans ,Calipers ,Medicine ,Donor cornea ,Prospective Studies ,business ,Descemet Stripping Endothelial Keratoplasty - Abstract
PURPOSE To create a nomogram including the translational speed of the microkeratome blade, microkeratome head size and precut tissue thickness to predict the postcut thickness for Descemet stripping automated endothelial keratoplasty to obtain the thinnest possible graft. METHODS This prospective study incorporated 48 grafts for DSAEK from March 2017 to June 2020. Corneal tissue for DSAEK was prepared by 3 experienced physicians using the Moria Evolution 3E (Moria Inc, Antony, France) microkeratome with 400, 450 and 500 μm head sizes. Precut central corneal thickness was measured with a DGH 550 handheld pachymeter (Pachette 2), taking an average of 3 readings. The microkeratome head was selected according to precut tissue thickness. The selected microkeratome head size was 150 μm less than the donor cornea thickness. Two translational speeds were used for the microkeratome cuts. One month after surgery, the central lenticular thickness was measured with a Visante® Optical Coherence Tomography caliper (Carl Zeiss Meditec Inc, Germany). A descriptive analysis was performed. RESULTS Forty-eight donor grafts were prepared. Mean graft thickness was 97.58 ± 29.84 μm (range 39-176 μm). Of the 48 samples, central graft thickness was
- Published
- 2021