Bitte benutzen Sie diese Referenz, um auf diese Ressource zu verweisen: doi:10.22028/D291-41131
Titel: Reliability analysis of successive Corneal Visualization Scheimpflug Technology measurements in different keratoconus stages
VerfasserIn: Flockerzi, Elias
Häfner, Larissa
Xanthopoulou, Kassandra
Daas, Loay
Munteanu, Cristian
Langenbucher, Achim
Seitz, Berthold
Sprache: Englisch
Titel: Acta Ophthalmologica
Bandnummer: 100 (2022)
Heft: 1
Seiten: e83-e90
Verlag/Plattform: Wiley
Erscheinungsjahr: 2021
Freie Schlagwörter: cornea
corvis ST
dynamic corneal response
ectasia
keratoconus
reliability
DDC-Sachgruppe: 610 Medizin, Gesundheit
Dokumenttyp: Journalartikel / Zeitschriftenartikel
Abstract: ABSTRACT. Background: This study assesses the reliability of successive corneal biomechanical response measurements by the Corneal Visualization Scheimpflug Technology (CST, Corvis ST , Oculus Optikger€ate, Wetzlar, Germany) in different keratoconus (KC) stages. Methods: A total of 173 eyes (15 controls: 15 eyes, and 112 KC patients: stages 1|1–2|2|2–3|3|3–4|4, n = 26|16|36|18|31|26|5 according to Topographical KC Classification, TKC) were repeatedly examined five times with the CST, each after repositioning the patient’s head and re-adjusting the device. Tomographical analysis (Pentacam HR ; Oculus, Wetzlar, Germany) was performed once before and once after CST measurements. Outcome measures included (1) A1 velocity, (2) deformation amplitude (DA) ratio 2 mm, (3) integrated radius, (4) stiffness parameter A1 and (5) Ambrosio relational thickness to the horizontal profile (ARTh). The Corvis Biomechanical Index (CBI) is reported to be extracted out of these parameters. Mean values of the five measurements and Cronbach’s a were calculated as a measure for reliability. Results: Ambrosio relational thickness to the horizontal profile and SPA1 were significantly higher in controls (534|123) compared to TKC1 (384|88), TKC2 (232|66), TKC3 (152|55) and TKC4 (71|27; p < 0.0001). The other parameters were similar in controls and TKC1 (A1 velocity: 0.148|0.151 m/s; integrated radius: 8.2|8.6 mm 1 ), but significantly higher in TKC stages 2 to 4 (DA ratio 2 mm: 5.5|6.3|8.0; A1 velocity: 0.173|0.174|0.186 m/second; integrated radius: 10.9|12.8|19.0 mm 1 ; p < 0.0001). All parameters proved to be highly reliable (Cronbach’s a ≥ 0.834) and the corneal tomography remained unaffected. Conclusions: The individual parameters included in the CBI (consisting of ARTh, SPA1, DA ratio 2 mm, A1 velocity and integrated radius) are highly reliable but differ KC stage-dependently.
DOI der Erstveröffentlichung: 10.1111/aos.14857
URL der Erstveröffentlichung: https://onlinelibrary.wiley.com/doi/10.1111/aos.14857
Link zu diesem Datensatz: urn:nbn:de:bsz:291--ds-411313
hdl:20.500.11880/36918
http://dx.doi.org/10.22028/D291-41131
ISSN: 1755-3768
1755-375X
Datum des Eintrags: 21-Nov-2023
Fakultät: M - Medizinische Fakultät
Fachrichtung: M - Augenheilkunde
Professur: M - Univ.-Prof. Dr. Dipl.-Ing. Achim Langenbucher
M - Prof. Dr. Berthold Seitz
Sammlung:SciDok - Der Wissenschaftsserver der Universität des Saarlandes



Diese Ressource wurde unter folgender Copyright-Bestimmung veröffentlicht: Lizenz von Creative Commons Creative Commons