Trephine- and dye-free technique for eye bank preparation of pre-stripped Descemet membrane endothelial keratoplasty tissue View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2019-05-11

AUTHORS

Tahereh Chamani, Mohammad Ali Javadi, Mozhgan Rezaei Kanavi

ABSTRACT

We describe a rapid and easy technique for the preparation of pre-stripped Descemet membrane (DM) endothelial keratoplasty (DMEK) tissue in the eye bank, without the use of dye or trephining by the eye bank technician. After drawing 2 radial marks 90° apart on the scleral rim of the cornea, a circumferential incision was made internal to the trabecular meshwork and the edge of the DM opposite to the marked area was scored and gently peeled towards the marked area. Finally, the peeled DM was gently unrolled and attached to the posterior stromal bed via absorbing excess liquid from the periphery. The prepared DMEK tissue while reattached on the posterior aspect of the cornea was subjected to slit-lamp biomicroscopic and specular microscopic examinations. In case of proper preparation of DMEK tissue and suitability of endothelial cells for DMEK surgery, the tissue was distributed for transplantation. At the time of surgery, trypan blue staining was performed by the cornea surgeon before DM trephination. Duration of DMEK tissue preparation, uneventful preparation, post-preparation endothelial cell loss, surgeon’s satisfaction, and intra- and post-operative attachment of the tissue were investigated variables in this study. Over a 2-year period, 28 DMEK tissues were successfully prepared from 30 corneas using our new technique. The median duration of DMEK preparation was 100 s. The area of endothelial cell loss was 1.8% ± 1.2% centrally and 6.2% ± 1.8% in areas close to the forceps contacts. Seven out of the 28 (25%) DMEK tissues were ruined by surgeons during surgery and the overall rate of re-bubbling in 19 transplanted DMEK tissues was 16%. The presented method, which uses no trephining or vital dye, has simplified and expedited the preparation process of pre-stripped DMEK tissue in the eye banks. More... »

PAGES

321-326

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s10561-019-09771-w

DOI

http://dx.doi.org/10.1007/s10561-019-09771-w

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1114101236

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/31079260


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