Retrospective Study on Radiological Factors Predictive of Psoas Impingement

Recruiting

• Conditions: Prosthetic Complication; Hip Impingement Syndrome
• Interventions: Diagnostic Test: Pelvis CT scan

• Registration Number: NCT05893823
• Lead Sponsor: Istituto Ortopedico Rizzoli

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.

Detailed Description

Not available

Study Timeline

• Study Start: 2022-06-06
• Study First Submitted: 2023-05-26
• Primary Completion: 2023-06-06
• Study First Submitted QC: 2023-06-07
• Study First Posted: 2023-06-08
• Status Verified: 2025-01
• Last Update Submitted: 2025-01-15
• Last Update Posted: 2025-01-16
• Study Completion: 2025-09-30

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 48

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 & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Arm && Interventions

Group	Intervention	Description
Cases	Pelvis CT scan	Patients that have symptomatic psoas impingement in a protruding acetabular cup documented by a Pelvis CT scan
Controls	Pelvis CT scan	Asymptomatic patients with a protruding acetabular cup documented by a Pelvis CT scan

Primary Outcome Measures

Name	Time	Method
Acetabular cup antiversion	0	The angle between the tangent to the cup opening and the tangent to the posterior ischial spines in the axial plane
Femoral offset	at baseline (day 0)	The distance between the center of rotation and the femoral axis in the frontal plane
Acetabular cup inclination	at baseline (day 0)	The angle between the tangent to the cup opening and the interteardrop line in the frontal plane
Acetabular offset	at baseline (day 0)	The distance between the center of rotation and the Kohler line in the frontal plane
Eccentric Reaming	at baseline (day 0)	The distance between the native hip center of rotation and the acetabular cup center of rotation in the axial plane

Trial Locations

Locations (1)

Istituto Ortopedico Rizzoli; 🇮🇹 Bologna, Emilia Romagna, Italy