Retrospective Study on Radiological Factors Predictive of Psoas Impingement

June 16, 2025 updated by: Istituto Ortopedico Rizzoli

Retrospective Study on Radiological Factors Predictive of Symptomatic Psoas Impingement Development in Protruding Cups in Primary Hip Arthroplasty

The purpose of this study is to identify radiological factors on TC of the hip that could lead to prediction of development of symptomatic psoas impingement in patients with protruding acetabular cup after primary total hip arthroplasty.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Observational

Enrollment (Actual)

52

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Italy
      • Bologna, Italy, 40136
        • IRCCS Istituto Ortopedico Rizzoli
    • Emilia Romagna
      • Bologna, Emilia Romagna, Italy, 40141
        • Istituto Ortopedico Rizzoli

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

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

Patients who had undergone a total hip arthroplasty with symptoms of iliopsoas impingement and radiological evidence of a protruding acetabular cup, detected on a Ct scan

Description

Inclusion Criteria:

  • Primary total hip arthroplasty
  • Execution of a postoperative Ct scan for pain, noises or planning of the contralateral THA
  • 5 years minimum follow-up for the control group, tenotomy of the iliopsoas muscle in the cases group
  • Complete clinical and radiological data

Exclusion Criteria:

  • Patient's refusal to participate
  • Non adequate Ct scans or made for periprosthetic fractures, component mobilization, periprosthetic infection or wearing of the prosthesis
  • Incomplete clinical and radiological data
  • Inadequate follow-up or regression of the iliopsoas impingement symptoms with non-operative treatment

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

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Cases
Patients that have symptomatic psoas impingement in a protruding acetabular cup documented by a Pelvis CT scan
Diagnostic test: Pelvis CT scan
Post-THA hip pelvis CT scan execution for pain, noise or THA planning for the controlateral hip, with identification of acetabular cup protrusion. Comparation of cases and controls to identify radiological factors that could potentially lead to symptomatic psoas impingement prediction.
Controls
Asymptomatic patients with a protruding acetabular cup documented by a Pelvis CT scan
Diagnostic test: Pelvis CT scan
Post-THA hip pelvis CT scan execution for pain, noise or THA planning for the controlateral hip, with identification of acetabular cup protrusion. Comparation of cases and controls to identify radiological factors that could potentially lead to symptomatic psoas impingement prediction.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Eccentric Reaming
Time Frame: at baseline (day 0)
The distance between the native hip center of rotation and the acetabular cup center of rotation in the axial plane
at baseline (day 0)
Acetabular Cup Antiversion
Time Frame: at baseline (day 0)
The angle between the tangent to the cup opening and the tangent to the posterior ischial spines in the axial plane
at baseline (day 0)
Acetabular Cup Inclination
Time Frame: at baseline (day 0)
The angle between the tangent to the cup opening and the interteardrop line in the frontal plane
at baseline (day 0)
Femoral Offset
Time Frame: at baseline (day 0)
The distance between the center of rotation and the femoral axis in the frontal plane
at baseline (day 0)
Acetabular Offset
Time Frame: at baseline (day 0)
The distance between the center of rotation and the Kohler line in the frontal plane
at baseline (day 0)

Collaborators and Investigators

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

Sponsor

Istituto Ortopedico Rizzoli

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 (Actual)

June 6, 2022

Primary Completion (Actual)

June 6, 2023

Study Completion (Actual)

June 14, 2025

Study Registration Dates

First Submitted

May 26, 2023

First Submitted That Met QC Criteria

June 7, 2023

First Posted (Actual)

June 8, 2023

Study Record Updates

Last Update Posted (Estimated)

July 1, 2025

Last Update Submitted That Met QC Criteria

June 16, 2025

Last Verified

June 1, 2025

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • PSOAS IMP

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

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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