Retrospective Study on Radiological Factors Predictive of Psoas Impingement

NCT05893823 | Completed Results

• 1 other identifier: PSOAS IMP
• Study Type: observational
• Target: 52
• Locations: 1 country
• Sites: 2

Brief Summary

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.

Conditions

Hip Impingement Syndrome; Prosthetic Complication

Keywords

Iliopsoas Impingement; Overhanging Cup

Outcome Measures

Primary Outcomes (5)

• Acetabular Cup Antiversion

  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

  The angle between the tangent to the cup opening and the interteardrop line in the frontal plane

  at baseline (day 0)

• Femoral Offset

  The distance between the center of rotation and the femoral axis in the frontal plane

  at baseline (day 0)

• Acetabular Offset

  The distance between the center of rotation and the Kohler line in the frontal plane

  at baseline (day 0)

• Eccentric Reaming

  The distance between the native hip center of rotation and the acetabular cup center of rotation in the axial plane

  at baseline (day 0)

Study Arms (2)

Cases

Patients that have symptomatic psoas impingement in a protruding acetabular cup documented by a Pelvis CT scan

Diagnostic Test: Pelvis CT scan

Controls

Asymptomatic patients with a protruding acetabular cup documented by a Pelvis CT scan

Diagnostic Test: Pelvis CT scan

Interventions

Pelvis CT scan DIAGNOSTIC_TEST

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.

Cases; Controls

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)
• 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

You may qualify if:

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

You may not qualify if:

• 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

Sponsors & Collaborators

• Istituto Ortopedico Rizzoli: lead

Study Sites (2)

Istituto Ortopedico Rizzoli

Bologna, Emilia-Romagna, 40141, Italy

Location

IRCCS Istituto Ortopedico Rizzoli

Bologna, 40136, Italy

Location

Results Point of Contact

• Title: Francesco Castagnini
• Organization: IRCCS Istituto Ortopedico Rizzoli

francescocastagnini@hotmail.it

0516366418

Publication Agreements

• PI is Sponsor Employee: No
• Restrictive Agreement: No

Study Design

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

Study Record Dates

• First Submitted: May 26, 2023
• First Posted: June 8, 2023
• Study Start: June 6, 2022
• Primary Completion: June 6, 2023
• Study Completion: June 14, 2025
• Last Updated: July 1, 2025
• Results First Posted: July 1, 2025

Record last verified: 2025-06

Data Sharing

• IPD Sharing: Will not share

Locations

IT (2)