Descemet membrane endothelial keratoplasty and corneal biomechanics. / Queratoplastia endotelial de la membrana de Descemet y biomecánica corneal.
Arch Soc Esp Oftalmol (Engl Ed)
; 95(9): 429-438, 2020 Sep.
Article
em En, Es
| MEDLINE
| ID: mdl-32576401
ABSTRACT
OBJECTIVE:
To study the behaviour of the biomechanical properties of the cornea in DMEK (Descemet membrane endothelial keratoplasty).METHOD:
Prospective longitudinal observational study. 21 pre and post-DMEK eyes. 3-month follow-up with the dynamic Scheimpflug Analyzer (Corvis ST, Oculus; Wetzlar, Germany). The following parameters were measured IOPnc non-corrected intraocular pressure (IOP), IOPb IOP corrected by biomechanics, maximum deflection amplitude (DefA), CCT central corneal pachymetry, flattening speed 1 and 2, peak distance, HC deformation amplitude deformation amplitude in maximum concavity, integrated inverse concave radius, DAR 1 and 2 deformation amplitude at 1mm and 2mm from the corneal apex, respectively. ARTh Ambrosial pachymetric ratio, SP1 stiffness parameter, CBI Corvis Biomechanical index and the maximum inverse radius. Pre-operative and post-operative measurements were performed with a 3-month follow-up and compared with a paired sample t-test.RESULTS:
There was a significant decrease in the IOPnc of 1.54±3mmHg (p<0.05), a significant increase in the post-surgical IOPb of 3.79±3.18mmHg (p<0.001), a significant pachymetric decrease of 164.4±91.35µm (p<0.001) after the intervention. All dynamic parameters of the Scheimpflug analyzer changed significantly after surgery (p<0.05), except the ARTh and IWC variables.CONCLUSIONS:
Variables indicate a decrease in corneal strength post-DMEK, with an increase in IOPb, at least the first 3 months after surgery. This finding is especially relevant in the follow-up of patients with coexisting glaucoma.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Tipo de estudo:
Observational_studies
Idioma:
En
/
Es
Revista:
Arch Soc Esp Oftalmol (Engl Ed)
Ano de publicação:
2020
Tipo de documento:
Article