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

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00173147
Recruitment Status : Unknown
Verified April 2005 by National Taiwan University Hospital.
Recruitment status was:  Recruiting
First Posted : September 15, 2005
Last Update Posted : October 27, 2008
Information provided by:
National Taiwan University Hospital

Brief 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.

Condition or disease
Patellofemoral Pain Syndrome

Study Type : Observational
Time Perspective: Retrospective
Official Title: Morphology of the Vastus Medialis Obliquus in Patients With Patellofemoral Pain Syndrome and Healthy Young Adults --A Sonographic Study
Study Start Date : May 2005

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Ages Eligible for Study:   15 Years to 50 Years   (Child, Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

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

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 identifier (NCT number): NCT00173147

NTUH Recruiting
Taipei, Taiwan, 100
Contact: Hsin-Yu Mao, Master    02-23123456 ext 7556   
Sponsors and Collaborators
National Taiwan University Hospital
Study Chair: Mei-Hwa Jan, Master NTU department of physical therapy Identifier: NCT00173147     History of Changes
Other Study ID Numbers: 9461700502
First Posted: September 15, 2005    Key Record Dates
Last Update Posted: October 27, 2008
Last Verified: April 2005

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