The Influence of "Operating Table Position Simulating Radiographs" on Acetabular Cup Angle During Primary Total Hip Replacement
Goal of the research
- To check the viability of "Operating Table Position Simulating Radiographs", while positioned on the contralateral side.
- To determine whether knowledge about the angles displayed on this radiograph (pelvic tilt) influences the accurate positioning of the acetabular cup during the Total Hip Replacement procedure.
研究概览
详细说明
Type of research:
A prospective study.
Population:
A power study has been calculated in order to define the sample size. The results indicated that the following sample size will suffice:
- Study group: 50 consecutive patients undergoing a primary total hip replacement procedure
- Control group: 50 consecutive patients undergoing a primary total hip replacement procedure
Inclusion criteria:
- Age>18
- Candidate for primary total hip replacement
- Agrees to participate in the study
Exclusion criteria:
1. Patient doesn't agree to participate in the study
Protocol:
Patients included in the research group and in the control group will undergo an "Operating Table Position Simulating " radiograph of the pelvis. The radiograph will be done in the following manner: the patient will be potisioned on the non-operated side in such way that his pelvis is perpendicular to the table. The legs are flexed in 30 degrees at the hip joints and 30 degrees at the knees. The plate with a grid will be placed behind the pelvis in a device with notches (which can be used to measure the angles later). After the total hip replacement the patients will undergo an A-P radiograph of the hip joints while lying on the back with the hip joints bent to 30 degrees to overcome the forward tilt of the pelvis. All of the radiographs will be performed in the presence of an orthopedic surgeon.
The control group will be the first group of patients. Their radiographs will be stored in a standalone file with controlled access rather than the general PACS system. The file will be opened only when the study is over. The radiologist will control the file and be responsible for this stage.
The study group will be the next group of patients. In this group the radiographs will be saved in the general PACS system. The radiographs with measurement of the lateral inclination of the pelvis, while lying in an "Operating Table Position" will be shown to the chief surgeon on the day of surgery or one day prior to it.
Both chief surgeons will not know about the study until the end of it. At the end of the study, a comparison of both groups' acetabular cup angles will be done. The angles will be measured twice. The first measurement will be done by a senior orthopedic surgeon specializing in joint replacement operations. The second one will be done by a senior radiologist specialized in skeletal radiology. If a difference of 5 degrees or more is found between the two measurements, a third measurement will be done by a third examiner.
研究类型
注册 (预期的)
阶段
- 不适用
联系人和位置
学习地点
-
-
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Jerusalem、以色列
- Hadassah Medical Organization
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-
参与标准
资格标准
适合学习的年龄
接受健康志愿者
有资格学习的性别
描述
Inclusion Criteria:
- Age>18
- Candidate for primary total hip replacement
- Agrees to participate in the study
Exclusion Criteria:
- Patient doesn't agree to participate in the study
- Dysplastic hip, Crowe>1
- After previous hip surgery
学习计划
研究是如何设计的?
设计细节
- 主要用途:治疗
- 分配:随机化
- 介入模型:并行分配
- 屏蔽:双倍的
武器和干预
参与者组/臂 |
干预/治疗 |
---|---|
无干预:Surgeon doesn't see
The surgeon doesn't see the radiograph prior to surgery
|
|
实验性的:Surgeon does see
The surgeon can see the radiograph prior to surgery
|
One radiograph with the patient lying on his contralateral side
|
研究衡量的是什么?
主要结果指标
结果测量 |
大体时间 |
---|---|
acetabular cup angle
大体时间:3 days
|
3 days
|
合作者和调查者
研究记录日期
研究主要日期
学习开始
初级完成 (实际的)
研究完成 (实际的)
研究注册日期
首次提交
首先提交符合 QC 标准的
首次发布 (估计)
研究记录更新
最后更新发布 (估计)
上次提交的符合 QC 标准的更新
最后验证
更多信息
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