Distinguishing Acetabulum Cup Retroversion From Anteversion on Anteroposterior Radiographs After Total Hip Arthroplasty

March 1, 2021 updated by: Taipei Medical University
In this study, investigators will demonstrate and prove a ellipse method (Liaw's version) for measurement and detection of acetabulum cup retroversion.

Study Overview

Status

Unknown

Conditions

Detailed Description

Total hip arthroplasty (THA) is considered to be the best and most reliable treatment of end-stage hip disorders with satisfactory long-term clinical outcomes. However,the incidence of postoperative dislocation ranges from 0.3% to 3% in primary THA. The most important risk factor is malpositioning of implant components. Generally, excessive anteversion and retroversion increase risk of anterior and posterior hip dislocation respectively. Several radiological methods have been proposed to measure anteversion of the acetabular cup on plain radiographs, but most of these methods cannot accurately distinguish cup retroversion from anteversion. In this study, investigators will demonstrate and prove a ellipse method (Liaw's version) for measurement and detection of acetabulum cup retroversion.

Study Type

Observational

Enrollment (Anticipated)

20

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

30 years to 90 years (Adult, Older Adult)

Accepts Healthy Volunteers

N/A

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Patients from Shuang Ho Hospital

Description

Inclusion Criteria:

  • Patients undergone total hip arthroplasty
  • Patients undergone total hip arthroplasty with more than two postoperative anteroposterior radiographs of pelvis
  • Patients undergone total hip arthroplasty with postoperative pelvic CT

Exclusion Criteria:

  • Patients with congenital pelvis abnormality or pelvic fracture history
  • Patients with postoperative periprosthetic fracture(s)
  • Patients with postoperative infection or implants loosening
  • Patients undergone total hip arthroplasty without more than two postoperative anteroposterior radiographs of pelvis
  • Patients undergone total hip arthroplasty without postoperative pelvic CT

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
A computerized ellipse method (Liaw's version) for measurement and detection of acetabulum cup retroversion.
Time Frame: 10 days
Total hip arthroplasty (THA) is considered to be the best and most reliable treatment of end-stage hip disorders with satisfactory long-term clinical outcomes. However,the incidence of postoperative dislocation ranges from 0.3% to 3% in primary THA. The most important risk factor is malpositioning of implant components. Generally, excessive anteversion and retroversion increase risk of anterior and posterior hip dislocation respectively. Several radiological methods have been proposed to measure anteversion of the acetabular cup on plain radiographs, but most of these methods cannot accurately distinguish cup retroversion from anteversion. In this article, we will demonstrate and prove a computerized ellipse method (Liaw's version) for measurement and detection of acetabulum cup retroversion.
10 days

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Taipei Medical University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Anticipated)

March 1, 2021

Primary Completion (Anticipated)

May 1, 2021

Study Completion (Anticipated)

May 1, 2021

Study Registration Dates

First Submitted

February 22, 2021

First Submitted That Met QC Criteria

March 1, 2021

First Posted (Actual)

March 3, 2021

Study Record Updates

Last Update Posted (Actual)

March 3, 2021

Last Update Submitted That Met QC Criteria

March 1, 2021

Last Verified

July 1, 2020

More Information

Terms related to this study

Other Study ID Numbers

  • N202005040

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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