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

Patellofemoral Pain Syndrome Clinical Trial

Official title:

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

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT00760136
• Other study ID #: 9461712133
• Status: Recruiting
• Phase: Phase 0
• First received: April 10, 2007
• Last updated: October 23, 2008
• Start date: August 2006
• Est. completion date: July 2009

Study information

• Verified date: September 2008
• Source: National Taiwan University Hospital
• Contact: Mai-Hwa Jan, MS
• Phone: 886-2-33228138
• Email: mhjan[@]ntu.edu.tw
• Is FDA regulated: No
• Health authority: Taiwan: Department of Health
• Study type: Observational

Clinical Trial 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.

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.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 150
• Est. completion date: July 2009
• Accepts healthy volunteers: No
• Gender: Both
• Age group: 20 Years to 50 Years

Eligibility

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

Study Design

Observational Model: Case-Only, Time Perspective: Retrospective

Related Conditions & MeSH terms

• Patellofemoral Pain Syndrome

Intervention

Procedure:
• Computed Tomography
CT imaging of bilateral knee

Locations

Country	Name	City	State
Taiwan	Mei-Hwa Jan	Taipei

Sponsors (1)

Lead Sponsor	Collaborator
National Taiwan University Hospital

Country where clinical trial is conducted

Taiwan,