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The Role of Quadriceps Contraction in Patellar Repositioning - a Computed Tomography Study

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ClinicalTrials.gov Identifier: NCT00760136
Recruitment Status : Unknown
Verified September 2008 by National Taiwan University Hospital.
Recruitment status was:  Recruiting
First Posted : September 26, 2008
Last Update Posted : October 24, 2008
Sponsor:
Information provided by:

Study Description
Brief Summary:

Background Previous studies have a great discrepancy concerning the effects of quadriceps contraction on patellar lateral displacement and tilt in patients with patellofemoral pain syndrome. This discrepancy may be caused by lack of information regarding to classifications of patellofemoral alignment under quadriceps relaxed. We hypothesized quadriceps contraction has different effects on each type of patellofemoral malalignment.

Methods The investigators expect to recruit 150 subjects with patellofemoral pain syndrome to participate in this study. All patients underwent computed tomography imaging of symptomatic knees, with and without quadriceps muscle contraction in 0°, 15° and 30° of knee flexion. Patellar lateral condyle index and patellar tilt angles of Sasaki and modified Fulkerson were measured to investigate the effect of quadriceps contraction on patellar repositioning.


Condition or disease Intervention/treatment Phase
Patellofemoral Pain Syndrome Procedure: Computed Tomography Early Phase 1

Detailed Description:

Background Previous studies have a great discrepancy concerning the effects of quadriceps contraction on patellar lateral displacement and tilt in patients with patellofemoral pain syndrome. This discrepancy may be caused by lack of information regarding to classifications of patellofemoral alignment under quadriceps relaxed. We hypothesized quadriceps contraction has different effects on each type of patellofemoral malalignment.

We expect to recruit 150 subjects with patellofemoral pain syndrome to participate in this study. All patients underwent computed tomography imaging of symptomatic knees, with and without quadriceps muscle contraction in 0°, 15° and 30° of knee flexion. Patellar lateral condyle index and patellar tilt angles of Sasaki and modified Fulkerson were measured to investigate the effect of quadriceps contraction on patellar repositioning.


Study Design

Study Type : Observational
Estimated Enrollment : 150 participants
Observational Model: Case-Only
Time Perspective: Retrospective
Official Title: The Role of Quadriceps Contraction in Patellar Repositioning-a Computed Tomography Study
Study Start Date : August 2006
Estimated Study Completion Date : July 2009

Resource links provided by the National Library of Medicine

MedlinePlus related topics: CT Scans
U.S. FDA Resources

Groups and Cohorts

Intervention Details:
    Procedure: Computed Tomography
    CT imaging of bilateral knee

Outcome Measures

Eligibility Criteria

Information from the National Library of Medicine

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Ages Eligible for Study:   20 Years to 50 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Probability Sample
Study Population
Patients with patellofemoral pain.
Criteria

Inclusion Criteria:

  • The inclusion criteria for patients with PFPS were suffering from pain with at least two kinds of knee-flexing activities such as:

    • sitting
    • getting up from sitting
    • walking upstairs or downstairs
    • squatting
    • getting up from squatting
    • running
    • kneeling
    • jumping

Exclusion Criteria:

The exclusion criteria included:

  • The presence of any major medical disease
  • Rheumatoid arthritis, gouty arthritis
  • Recent history (within 3 months) of knee surgery
  • Image findings of osteoarthritis
  • Any deformity of lower limbs
Contacts and Locations

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00760136


Contacts
Contact: Mai-Hwa Jan, MS 886-2-33228138 mhjan@ntu.edu.tw

Locations
Taiwan
Mei-Hwa Jan Recruiting
Taipei, Taiwan, 100
Contact: Mei-Hwa Jan, MS    886-2-33228138    mhjan@ntu.edu.tw   
Sponsors and Collaborators
National Taiwan University Hospital
Investigators
Study Director: Mai-Hwa Jan, MS Graduate institute of physical therapy
More Information

Responsible Party: ethics committee of National Taiwan University Hospital, National Taiwan University Hospital
ClinicalTrials.gov Identifier: NCT00760136     History of Changes
Other Study ID Numbers: 9461712133
First Posted: September 26, 2008    Key Record Dates
Last Update Posted: October 24, 2008
Last Verified: September 2008

Keywords provided by National Taiwan University Hospital:
patellofemoral pain
quadriceps contraction

Additional relevant MeSH terms:
Patellofemoral Pain Syndrome
Joint Diseases
Musculoskeletal Diseases