Agreement and Accuracy of Different Devices for Biometry Measurements in Patients With Cataract (Comparison)
24 mars 2020 uppdaterad 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
Studieöversikt
Status
Okänd
Intervention / Behandling
Detaljerad beskrivning
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.
Studietyp
Interventionell
Inskrivning (Förväntat)
50
Fas
- Inte tillämpbar
Kontakter och platser
Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.
Studieorter
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Vienna, Österrike, 1090
- Rekrytering
- Medical University of Vienna Allgemeines Krankenhaus
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Kontakt:
- Rupert Menapace, Prof.
- Telefonnummer: 014040066300
- E-post: rupert.menapace@meduniwien.ac.at
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Kontakt:
- Christina Leydolt, MD
- Telefonnummer: 79480 01 40400
- E-post: christina.leydolt@meduniwien.ac.at
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Deltagandekriterier
Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.
Urvalskriterier
Åldrar som är berättigade till studier
40 år till 95 år (Vuxen, Äldre vuxen)
Tar emot friska volontärer
Nej
Kön som är behöriga för studier
Allt
Beskrivning
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
Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.
Hur är studien utformad?
Designdetaljer
- Primärt syfte: Diagnostisk
- Tilldelning: Randomiserad
- Interventionsmodell: Enskild gruppuppgift
- Maskning: Fyrdubbla
Vapen och interventioner
Deltagargrupp / Arm |
Intervention / Behandling |
|---|---|
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Aktiv komparator: IOL Master® 700
Biometry will be performed three times consecutively.
|
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.
|
|
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.
|
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.
|
|
Aktiv komparator: Spectralis Anterion®
Biometry will be performed three times consecutively.
|
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.
|
Vad mäter studien?
Primära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
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Agreement of the four devices measuring mean keratometry value.
Tidsram: 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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Sekundära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
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Agreement of the four devices measuring mean steep keratometry value.
Tidsram: 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.
Tidsram: 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.
Tidsram: 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
Tidsram: 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
Tidsram: 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
Tidsram: 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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Samarbetspartners och utredare
Det är här du hittar personer och organisationer som är involverade i denna studie.
Sponsor
Utredare
- Huvudutredare: Rupert Menapace, MD, Medical University of Vienna
Studieavstämningsdatum
Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.
Studera stora datum
Studiestart (Faktisk)
5 mars 2020
Primärt slutförande (Förväntat)
30 juli 2020
Avslutad studie (Förväntat)
30 juli 2020
Studieregistreringsdatum
Först inskickad
17 mars 2020
Först inskickad som uppfyllde QC-kriterierna
24 mars 2020
Första postat (Faktisk)
26 mars 2020
Uppdateringar av studier
Senaste uppdatering publicerad (Faktisk)
26 mars 2020
Senaste inskickade uppdateringen som uppfyllde QC-kriterierna
24 mars 2020
Senast verifierad
1 mars 2020
Mer information
Termer relaterade till denna studie
Ytterligare relevanta MeSH-villkor
Andra studie-ID-nummer
- 1845/2019
Plan för individuella deltagardata (IPD)
Planerar du att dela individuella deltagardata (IPD)?
NEJ
Läkemedels- och apparatinformation, studiedokument
Studerar en amerikansk FDA-reglerad läkemedelsprodukt
Nej
Studerar en amerikansk FDA-reglerad produktprodukt
Nej
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