Evaluation of Ultrasound for Detecting Hip Impingement

Study Overview
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Brief Summary
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Patients are being asked to participate in this study because a previous research MRI of their hips showed that the shape of the head of their thigh bone may indicate FAI of the hip. We have already collected cartilage imaging data and data on how the hip joint moves on people with painful/symptomatic FAI and people with normal hip function. We would now like to compare the motion of the hip joint to those with painful FAI using ultrasound.

Detailed Description
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Hip impingement is thought to be a leading cause of hip osteoarthritis, and occurs due to deformities in the hip joint. However some individuals have these deformities but do not exhibit symptoms. Using the standard magnetic resonance imaging and clinical tests it is not clear which deformities will cause degeneration, requiring surgical intervention. We propose to evaluate the deformity and impingement between the femur and acetabulum using dynamic ultrasound imaging. Ultrasound does not involve radiation and can acquire video of the hip joint and is thus suitable for such diagnostic purposes. In this pilot study we will evaluate the feasibility of ultrasound in diagnosing hip impingement.

Official Title
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Diagnosing Deformities of the Hip Associated With Arthritis: MRI vs Ultrasound

Conditions
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Femoroacetabular Impingement

Intervention / Treatment
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* Procedure: Magnetic resonance imaging
* Procedure: Ultrasound


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Surgical group: Hip pain longer than 6 months referred to the groin/lateral aspect of the hip Positive Impingement Sign Plain radiographs: Absence of arthritis (Tonnis Grade 0 or 1) Absence of dysplasia (center edge >25 degrees) on anterior-posterior radiograph α-angle greater than 60 degrees on MRI. Exclusion Criteria: Patients who don't meet inclusion criteria Control group: subjects with hip pain or with alpha angle > 50 degrees on MRI

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 40 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Screening
Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Surgical group<br>Subjects already scheduled to undergo surgical correction of a symptomatic cam-type hip impingement deformity. Subjects will undergo magnetic resonance imaging (MRI) and ultrasound investigation prior to surgery. | Procedure: Magnetic resonance imaging<br> <br> Procedure: Ultrasound<br> <br> |
| Other: Control<br>Asymptomatic subjects with normal hip morphometry, as determined by MRI. Subjects will undergo magnetic resonance imaging (MRI) and ultrasound imaging. | Procedure: Magnetic resonance imaging<br> <br> Procedure: Ultrasound<br> <br> |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Ultrasound grade | Ultrasound grade evaluated on a four point scale following ultrasound imaging session | Upon enrollment | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Ultrasound parameters | Morphometry of hip measured in ultrasound images: alpha angle, clearance angle | Upon enrollment | 
| MRI parameters | Standard MRI measures of impingement from images. Used as gold standard for comparative purposes. | Upon enrollment | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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femoroacetabular impingement, morphometry, dynamic, magnetic resonance imaging, ultrasound, screening, diagnosis