Agreement and Accuracy of Different Devices for Biometry Measurements in Patients With Cataract (Comparison)
24. mars 2020 oppdatert av: Rupert Menapace, Medical University of Vienna
The rationale of this study is to compare repeatability, reproducibility and agreement of three different AS-OCT devices and Pentacam.
The investigational devices are approved biometry and keratometry devices to perform biometric/keratometric measurements preoperatively before cataract surgery. The measurements are used to calculate the needed IOL power.
Measurements with all four devices will be performed 3 times consecutively by two trained observer. The order of the observer, the order of devices as well as the eye (left/right) is randomized.
Examinations will be implemented in accordance with the approved investigational plan on subjects and includes: repeated biometry/keratometry with four different devices
Studieoversikt
Status
Ukjent
Intervensjon / Behandling
Detaljert beskrivelse
The rationale of this study is to compare repeatability, reproducibility and agreement of both, AS-OCT(s) and Pentacam.
In our department three different AS-OCT devices and a HR Scheimpflug imaging device are currently in use for clinical routine to measure the cornea.
Among refractive and anterior segment surgeons, there is no preferred and accepted method for accurate measurements of the corneal curvature.
The four diagnostic tools are based on different technical and physical imaging principles and to date only limited information on their comparability exist.
One advantage of ASOCT represents faster imaging speed when compared to Scheimpflug imaging.
Thus, imaging misalignment, segmentation errors and defocus aberration can most likely be avoided by AS-OCT.
Chen et al demonstrated that HR Scheimpflug imaging measurements of CCT were systematically higher than the measurements provided by FD AS-OCT.
Further, repeatability, reproducibility and agreement of AS-OCT and Scheimpflug imaging device will be assessed during follow-up.
Studietype
Intervensjonell
Registrering (Forventet)
50
Fase
- Ikke aktuelt
Kontakter og plasseringer
Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.
Studiesteder
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Vienna, Østerrike, 1090
- Rekruttering
- Medical University of Vienna Allgemeines Krankenhaus
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Ta kontakt med:
- Rupert Menapace, Prof.
- Telefonnummer: 014040066300
- E-post: rupert.menapace@meduniwien.ac.at
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Ta kontakt med:
- Christina Leydolt, MD
- Telefonnummer: 79480 01 40400
- E-post: christina.leydolt@meduniwien.ac.at
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Deltakelseskriterier
Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.
Kvalifikasjonskriterier
Alder som er kvalifisert for studier
40 år til 95 år (Voksen, Eldre voksen)
Tar imot friske frivillige
Nei
Kjønn som er kvalifisert for studier
Alle
Beskrivelse
Inclusion Criteria:
- Age-related cataract
- Age 40 and older (females of childbearing age will be interviewed if pregnancy is possible)
Exclusion Criteria:
- Contact lens wear within 5 days
- Pathologic changes of the cornea, eye lid or conjunctiva on slit- lamp examination
- History of corneal ocular surgery
- Microphthalmus
- Recurrent intraocular inflammation of unknown etiology
- Blind fellow eye
- Uncontrolled systemic or ocular disease
Studieplan
Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.
Hvordan er studiet utformet?
Designdetaljer
- Primært formål: Diagnostisk
- Tildeling: Randomisert
- Intervensjonsmodell: Enkeltgruppeoppdrag
- Masking: Firemannsrom
Våpen og intervensjoner
Deltakergruppe / Arm |
Intervensjon / Behandling |
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Aktiv komparator: IOL Master® 700
Biometry will be performed three times consecutively.
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Patients will be asked to place the chin in position and open their eyes wide.
In between measurements, the patient will be arranged so his eyes are in one horizontal line and each time before measurement the patient will be asked to blink several times.
Patients will be asked to place the chin in position and open their eyes wide.
In between measurements, the patient will be arranged so his eyes are in one horizontal line and each time before measurement the patient will be asked to blink several times.
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Aktiv komparator: Pentacam®
Keratometry will be performed three times consecutively.
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Patients will be asked to place the chin in position and open their eyes wide.
In between measurements, the patient will be arranged so his eyes are in one horizontal line and each time before measurement the patient will be asked to blink several times.
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Aktiv komparator: Casia II®
Keratometry will be performed three times consecutively.
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Patients will be asked to place the chin in position and open their eyes wide.
In between measurements, the patient will be arranged so his eyes are in one horizontal line and each time before measurement the patient will be asked to blink several times.
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Aktiv komparator: Spectralis Anterion®
Biometry will be performed three times consecutively.
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Patients will be asked to place the chin in position and open their eyes wide.
In between measurements, the patient will be arranged so his eyes are in one horizontal line and each time before measurement the patient will be asked to blink several times.
Patients will be asked to place the chin in position and open their eyes wide.
In between measurements, the patient will be arranged so his eyes are in one horizontal line and each time before measurement the patient will be asked to blink several times.
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Hva måler studien?
Primære resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
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Agreement of the four devices measuring mean keratometry value.
Tidsramme: 1 year
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The measured K-Value of each device and the k-values within one device will be compared
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1 year
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Sekundære resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
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Agreement of the four devices measuring mean steep keratometry value.
Tidsramme: 1 year
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The measured steep K-Value of each device and the steep k-values within one device will be compared
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1 year
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Agreement of the four devices measuring mean flat keratometry value.
Tidsramme: 1 year
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The measured flat K-Value of each device and the flat k-values within one device will be compared
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1 year
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Agreement of the four devices measuring mean true keratometry value.
Tidsramme: 1 year
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The measured true K-Value of each device and the true k-values within one device will be compared
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1 year
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Agreement of the devices measuring mean axial length
Tidsramme: 1 year
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The measured axial length of each device and the axial length within one device will be compared
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1 year
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Agreement of the devices measuring mean lens thickness
Tidsramme: 1 year
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The measured lens thickness of each device and the measured lens thickness within one device will be compared
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1 year
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Agreement of the devices measuring mean white-to-white measurement
Tidsramme: 1 year
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The measured white-to-white distance of each device and the measured white-to-white distance within one device will be compared
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1 year
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Samarbeidspartnere og etterforskere
Det er her du vil finne personer og organisasjoner som er involvert i denne studien.
Sponsor
Etterforskere
- Hovedetterforsker: Rupert Menapace, MD, Medical University of Vienna
Studierekorddatoer
Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.
Studer hoveddatoer
Studiestart (Faktiske)
5. mars 2020
Primær fullføring (Forventet)
30. juli 2020
Studiet fullført (Forventet)
30. juli 2020
Datoer for studieregistrering
Først innsendt
17. mars 2020
Først innsendt som oppfylte QC-kriteriene
24. mars 2020
Først lagt ut (Faktiske)
26. mars 2020
Oppdateringer av studieposter
Sist oppdatering lagt ut (Faktiske)
26. mars 2020
Siste oppdatering sendt inn som oppfylte QC-kriteriene
24. mars 2020
Sist bekreftet
1. mars 2020
Mer informasjon
Begreper knyttet til denne studien
Ytterligere relevante MeSH-vilkår
Andre studie-ID-numre
- 1845/2019
Plan for individuelle deltakerdata (IPD)
Planlegger du å dele individuelle deltakerdata (IPD)?
NEI
Legemiddel- og utstyrsinformasjon, studiedokumenter
Studerer et amerikansk FDA-regulert medikamentprodukt
Nei
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Nei
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