Agreement and Accuracy of Different Devices for Biometry Measurements in Patients With Cataract (Comparison)
2020年3月24日 更新者：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
研究概览
详细说明
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.
研究类型
介入性
注册 (预期的)
50
阶段
- 不适用
联系人和位置
本节提供了进行研究的人员的详细联系信息，以及有关进行该研究的地点的信息。
学习地点
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Vienna、奥地利、1090
- 招聘中
- Medical University of Vienna Allgemeines Krankenhaus
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接触：
- Rupert Menapace, Prof.
- 电话号码：014040066300
- 邮箱：rupert.menapace@meduniwien.ac.at
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接触：
- Christina Leydolt, MD
- 电话号码：79480 01 40400
- 邮箱：christina.leydolt@meduniwien.ac.at
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参与标准
研究人员寻找符合特定描述的人，称为资格标准。这些标准的一些例子是一个人的一般健康状况或先前的治疗。
资格标准
适合学习的年龄
40年 至 95年 (成人、年长者)
接受健康志愿者
不
有资格学习的性别
全部
描述
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
学习计划
本节提供研究计划的详细信息，包括研究的设计方式和研究的衡量标准。
研究是如何设计的？
设计细节
- 主要用途：诊断
- 分配：随机化
- 介入模型：单组作业
- 屏蔽：四人间
武器和干预
参与者组/臂 |
干预/治疗 |
|---|---|
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有源比较器：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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有源比较器：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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有源比较器：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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有源比较器：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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研究衡量的是什么？
主要结果指标
结果测量 |
措施说明 |
大体时间 |
|---|---|---|
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Agreement of the four devices measuring mean keratometry value.
大体时间：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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次要结果测量
结果测量 |
措施说明 |
大体时间 |
|---|---|---|
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Agreement of the four devices measuring mean steep keratometry value.
大体时间：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.
大体时间：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.
大体时间：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
大体时间：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
大体时间：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
大体时间：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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合作者和调查者
在这里您可以找到参与这项研究的人员和组织。
调查人员
- 首席研究员：Rupert Menapace, MD、Medical University of Vienna
研究记录日期
这些日期跟踪向 ClinicalTrials.gov 提交研究记录和摘要结果的进度。研究记录和报告的结果由国家医学图书馆 (NLM) 审查，以确保它们在发布到公共网站之前符合特定的质量控制标准。
研究主要日期
学习开始 (实际的)
2020年3月5日
初级完成 (预期的)
2020年7月30日
研究完成 (预期的)
2020年7月30日
研究注册日期
首次提交
2020年3月17日
首先提交符合 QC 标准的
2020年3月24日
首次发布 (实际的)
2020年3月26日
研究记录更新
最后更新发布 (实际的)
2020年3月26日
上次提交的符合 QC 标准的更新
2020年3月24日
最后验证
2020年3月1日
更多信息
此信息直接从 clinicaltrials.gov 网站检索，没有任何更改。如果您有任何更改、删除或更新研究详细信息的请求，请联系 register@clinicaltrials.gov. clinicaltrials.gov 上实施更改，我们的网站上也会自动更新.