Morphology of the VMO in Patients With PFPS and Healthy Young Adults--A Sonographic Study

Patellofemoral Pain Syndrome Clinical Trial

Official title:

Morphology of the Vastus Medialis Obliquus in Patients With Patellofemoral Pain Syndrome and Healthy Young Adults --A Sonographic Study

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT00173147
• Other study ID #: 9461700502
• Status: Recruiting
• Phase: N/A
• First received: September 12, 2005
• Last updated: October 24, 2008
• Start date: May 2005

Study information

• Verified date: April 2005
• Source: National Taiwan University Hospital
• Contact: n/a
• Is FDA regulated: No
• Health authority: Taiwan: Department of Health
• Study type: Observational

Clinical Trial Summary

Background：Patellofemoral pain syndrome（PFPS） is a common knee disorder characterized by anterior or retropatellar pain associated with activities that load the patellofemoral joint. Previous studies reveal that the vastus medialis obliquus（VMO） is an important dynamic medial stabilizer of the patellar. Insufficiency of the VMO leads to lateral shift of the patella and the increases the patellofemoral contact force. An in vitro study conducted by Hubbard JK. et al. claimed that there were no significant relationship between several morphologic characteristics of the VMO and the extent of patellofemoral joint deterioration. We consider that the condition might be different in vivo, so we chose ultrasonogrphy as the measurement tool to examine the morphology of the VMO in PFPS patients and healthy controls. Purpose：To determine if there are significant differences in several morphologic parameters of the VMO between patients with PFPS and healthy controls under 50. Method：31 PFPS patients and 31 matched healthy adults under 50 were recruited for the study. The HDI 5000 ultrasonography machine was used to evaluate morphologic parameters of the VMO, including the percent of patella attachment, fiber angle, the volume attached to the patella, and the change of shape of the VMO.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 0
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Both
• Age group: 15 Years to 50 Years

Eligibility

Inclusion Criteria:

1. under 50 years old.

2. Have a diagnosis of PFPS.

Exclusion Criteria:

1. Diagnosis other than PFPS,such as meniscal lesion, ligamentous instability ,patellar tendon pathology, traction apophysitis, radiation pain, referred pain, ect.

2. Knee operation within three month.

3. X-ray findings (1)joint space narrowing (2)osteophyte formation

Study Design

Time Perspective: Retrospective

Related Conditions & MeSH terms

• Patellofemoral Pain Syndrome

Locations

Country	Name	City	State
Taiwan	NTUH	Taipei

Sponsors (1)

Lead Sponsor	Collaborator
National Taiwan University Hospital

Country where clinical trial is conducted

Taiwan,