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

NCT04780100 | Unknown

• 1 other identifier: N202005040
• Study Type: observational
• Target: 20
• Locations: 0 countries
• Sites: N/A

Brief Summary

In this study, investigators will demonstrate and prove a ellipse method (Liaw's version) for measurement and detection of acetabulum cup retroversion.

Conditions

Orthopedics

Outcome Measures

Primary Outcomes (1)

• A computerized ellipse method (Liaw's version) for measurement and detection of acetabulum cup retroversion.

  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

Eligibility Criteria

• Age: 30 Years - 90 Years
• Sex: all
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

Patients from Shuang Ho Hospital

You may qualify if:

• 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

You may not qualify if:

• 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

Sponsors & Collaborators

• Taipei Medical University: lead

Study Officials

• Chen-Kun Liaw

  Taipei Medical University

  STUDY CHAIR

Central Study Contacts

Chen-Kun Liaw

CONTACT

+886963969162; chenkunliaw@tmu.edu.tw

Study Design

• Study Type: observational
• Observational Model: CASE ONLY
• Time Perspective: RETROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: February 22, 2021
• First Posted: March 3, 2021
• Study Start: March 1, 2021
• Primary Completion: May 1, 2021
• Study Completion: May 1, 2021
• Last Updated: March 3, 2021

Record last verified: 2020-07