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Completed

NCT Number: NCT05893823

Retrospective Study on Radiological Factors Predictive of Psoas Impingement

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.

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Key information

Conditions

Hip Impingement Syndrome Prosthetic Complication

Age range

18 year and older

Sex eligibility

All sexes

Study type

Observational

Primary location

Istituto Ortopedico Rizzoli, Bologna, Emilia-Romagna, Italy

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Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

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

Treatment and study plan

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.

Primary outcomes

  1. 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

  2. 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

  3. Femoral Offset

    Time frame: at baseline (day 0)

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

  4. Acetabular Offset

    Time frame: at baseline (day 0)

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

  5. 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

Sponsors and collaborators

Lead sponsor

Istituto Ortopedico Rizzoli

Other

Registry information

Official study title

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

Important dates

Study start
2022
Primary completion
2023
Study completion
2025
First posted
Jun 8, 2023
Registry last updated
Jul 1, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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