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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 |
Dateien zu diesem Datensatz:
Datei | Beschreibung | Größe | Format | |
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Acta Ophthalmologica - 2021 - Flockerzi - Reliability analysis of successive Corneal Visualization Scheimpflug Technology.pdf | 822,55 kB | Adobe PDF | Öffnen/Anzeigen |
Diese Ressource wurde unter folgender Copyright-Bestimmung veröffentlicht: Lizenz von Creative Commons