Hip Strength and Nerve Palsy After the Modified Stoppa Approach to Acetabular Fracture Reduction and Fixation

Decreased Hip Adductor Strength and Obturator Nerve Palsy After the Modified Stoppa Approach to Acetabular Fracture Reduction and Fixation: Is Retraction to Blame?

The purpose of this prospective study is to compare hip adductor strength and obturator nerve palsy between acetabular fracture patients whose fracture was reduced and fixated using the modified Stoppa approach (subjects) and pelvic fracture patients (controls) using physical strength testing, radiographs, clinical assessment, and a validated functional outcome questionnaire. The investigators' research hypothesis is that there will be less strength and higher incidence of obturator nerve palsy in patients treated with the modified Stoppa approach (intervention) than in patients treated without the modified Stoppa approach (controls).

Study Overview

• Status: Terminated
• Conditions: Pelvic Fracture; Acetabular Fracture

• Study Type: Observational
• Enrollment (Actual): 43

Contacts and Locations

Study Locations

• United States
  • Utah
    • Salt Lake City, Utah, United States, 84121
      • University Of Utah Orthopedics Center

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 99 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

• Sampling Method: Non-Probability Sample

Study Population

Pelvic fracture patients and patients treated for acetabular fractures with the modified Stoppa approach will be asked to consent to a voluntary study investigating physical function at their 2 week follow-up appointment.

Description

Inclusion Criteria:

• Inclusion criteria for the subject patient population under study consists of male and female adults, at least 18 years old, who had an acetabular fracture that was treated with the modified Stoppa approach.
• Inclusion criteria for the control patient population under study consists of male and female adults, at least 18 years old, who had acetabular fractures with similar fracture patterns as the study group that were treated with any other approach than the Stoppa approach.

Exclusion Criteria:

• Exclusion criteria for the subject and control patient population consist of:
• Patients who are non-ambulatory.
• Patients less than 18 years of age.
• Patients who do not speak English.
• Patients who are unable to complete their follow-up in Utah.

Study Plan

How is the study designed?

Design Details

• Observational Models: Cohort
• Time Perspectives: Prospective

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
Outpatient physical therapy strength testing will be used to assess hip adductor strength in all participants (subjects and controls).	1 year follow-up after surgery

Secondary Outcome Measures

Outcome Measure	Time Frame
Radiographs and clinical assessment at follow-up appointments will be used to determine incidence of obturator nerve palsy in both groups (subjects and controls).	1 year follow-up after surgery

Collaborators and Investigators

• Sponsor: University of Utah
• Investigators: Principal Investigator: David Rothberg, MD, Orthopedic Surgery Operations

Study record dates

Study Major Dates

• Study Start: April 1, 2012
• Primary Completion (Actual): February 1, 2020
• Study Completion (Actual): February 1, 2020

Study Registration Dates

• First Submitted: January 4, 2013
• First Submitted That Met QC Criteria: January 7, 2013
• First Posted (Estimate): January 8, 2013

Study Record Updates

• Last Update Posted (Actual): May 4, 2020
• Last Update Submitted That Met QC Criteria: April 29, 2020
• Last Verified: April 1, 2020

More Information

Terms related to this study

• Keywords: acetabular fracture; pelvic fracture; hip adductor strength; obturator nerve palsy; modified Stoppa approach
• Additional Relevant MeSH Terms: Wounds and Injuries; Leg Injuries; Femoral Fractures; Hip Injuries; Fractures, Bone; Hip Fractures
• Other Study ID Numbers: 55695