Functional Implications of Arthroscopic Iliopsoas Release

The purpose of this study is to investigate the functional effects of arthroscopic iliopsoas release. To complete this aim, we will recruit patients who have undergone arthroscopic iliopsoas release by Dr. Aoki. Each subjects contralateral nonoperative hip will serve as their own control. To delineate the effects of arthroscopic surgery alone from those resulting from iliopsoas release in addition to arthroscopic surgery, we will recruit a second control group consisting of patients who have undergone arthroscopic surgery by Dr. Aoki without iliopsoas release.

For both hips of each subject, we will:

• Quantify the muscle volume of the iliopsoas muscle with MRI.
• Quantify hip flexion strength with isokinetic dynamometry.
• Quantify patient function and satisfaction with functional outcome surveys.

This data will allow us to test the following hypotheses:

• Compared to the non-operative hip, hips undergoing arthroscopic iliopsoas release have decreased iliopsoas muscle volume and hip flexion strength.
• Compared to hips undergoing arthroscopic surgery without iliopsoas release, hips undergoing arthroscopic iliopsoas release have decreased iliopsoas muscle volume and hip flexion strength.
• Patient function and satisfaction positively correlates to muscle bulk and strength.

Study Overview

• Status: Completed
• Conditions: Arthroscopic Iliopsoas Release

• Study Type: Observational
• Enrollment (Actual): 36

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 90 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

• Sampling Method: Non-Probability Sample

Study Population

Patients undergoing arthroscopic surgery by Dr. Aoki, divided into two groups:

Those undergoing arthroscopic psoas release, and those undergoing arthroscopic surgery without psoas release,

Description

Inclusion Criteria:

• All subjects will be greater than 18 years of age.
• We will recruit 18 subjects who have undergone arthroscopic iliopsoas release by Dr. Aoki.
• We will recruit 18 additional subjects that had hip arthroscopy with Dr. Aoki without iliopsoas release to serve as a control group.

Exclusion Criteria:

• As the nonoperative contralateral hip will serve as a control to the operative hip, we will exclude patients for this study who have undergone bilateral procedures.
• We will exclude any patients who are not comfortable with the MRI scan, stationary bike or strength testing.

Study Plan

How is the study designed?

Design Details

• Observational Models: Case-Control
• Time Perspectives: Prospective

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
Muscle Volume	1 yr post op

Secondary Outcome Measures

Outcome Measure	Time Frame
Hip Flexion Strength	1 yr post op

Collaborators and Investigators

• Sponsor: University of Utah
• Investigators: Principal Investigator: Stephen Aoki, Orthopedic Surgery Operations

Study record dates

Study Major Dates

• Study Start: September 1, 2012
• Primary Completion (Actual): February 1, 2016
• Study Completion (Actual): February 1, 2016

Study Registration Dates

• First Submitted: January 4, 2013
• First Submitted That Met QC Criteria: January 4, 2013
• First Posted (Estimate): January 8, 2013

Study Record Updates

• Last Update Posted (Estimate): August 15, 2016
• Last Update Submitted That Met QC Criteria: August 12, 2016
• Last Verified: August 1, 2016

More Information

Terms related to this study

• Keywords: MRI; Arthroscopic; Iliopsoas
• Other Study ID Numbers: 58424