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

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified April 2005 by National Taiwan University Hospital.
Recruitment status was:  Recruiting
Information provided by:
National Taiwan University Hospital Identifier:
First received: September 12, 2005
Last updated: October 24, 2008
Last verified: April 2005
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.

Patellofemoral Pain Syndrome

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

Further study details as provided by National Taiwan University Hospital:

Study Start Date: May 2005

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
  Contacts and Locations
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Please refer to this study by its identifier: 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
  More Information Identifier: NCT00173147     History of Changes
Other Study ID Numbers: 9461700502
Study First Received: September 12, 2005
Last Updated: October 24, 2008

Additional relevant MeSH terms:
Patellofemoral Pain Syndrome
Pathologic Processes
Joint Diseases
Musculoskeletal Diseases processed this record on August 18, 2017