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Evaluating Muscle Function After Ankle Surgery

This study has been completed.
Information provided by:
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) Identifier:
First received: May 16, 2003
Last updated: June 23, 2005
Last verified: March 2003
Patients who are forced to rest or reduce activity as a result of illness, injury, or surgery often experience resulting muscle weakness. This study will evaluate muscle features and muscle strength in patients who are recovering from surgery for broken ankles. The goal of this study is to improve the recovery of muscle function and overall ability after prolonged periods of ankle inactivity due to surgery.

Condition Intervention
Muscle Atrophy Muscle Weakness Fractures Procedure: Physical Therapy

Study Type: Observational
Study Design: Observational Model: Natural History
Time Perspective: Longitudinal
Time Perspective: Prospective
Official Title: Restoration of Muscle Function During Rehabilitation

Further study details as provided by Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD):

Estimated Enrollment: 30
Study Start Date: September 1995
Estimated Study Completion Date: August 2000
Detailed Description:

Many physiological conditions are associated with muscle weakness and can affect movement. This study will investigate which metabolic and morphological features of skeletal muscle are uniquely altered during the course of rehabilitation and how they affect muscle function and performance in daily ambulatory activities. This study will also examine how well the commonly used assessment measures reflect actual muscle capacity. Finally, because there is evidence that activity does not affect all fiber types uniformly, fiber-type specific metabolic and morphological measures will be performed.

Participants in this study will have had an ankle injury that has been treated surgically (Open Reduction Internal Fixation, or ORIF) followed by 5 to 10 weeks of cast immobilization. Following initial baseline measurements made after 1 week of re-ambulation, participants are enrolled in a 10-week rehabilitation program that focuses on restoration of both muscle strength and endurance. Assessments are made at Weeks 5 and 10 and include 31P-Magnetic Resonance Spectroscopy (MRS), Magnetic Resonance Imaging (MRI), muscle biopsy, and muscle function and functional performance tests. 31P-measurements monitor changes in the in vivo metabolic characteristics of skeletal muscle. 3D-MRI procedures will be used to quantify the maximal muscle cross-sectional area and total muscle volume. Muscle endurance and strength will be measured using an isokinetic dynamometer. Functional performance tests consist of self-selected walking pace, power for ascending and descending stairs, and toe raises while standing on one foot.

Nine participants (six patients and three control volunteers) will be studied each year. Control volunteers are submitted to the same measurements at similar time intervals in order to assess variability over time.


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • 5 to 10 weeks of cast immobilization following surgery (ORIF) for mallerolar fracture

Exclusion Criteria:

  • Pregnant or breastfeeding
  • Severe claustrophobia
  • MRI incompatible metal implants (e.g., pacemaker)
  • Diabetes or peripheral neuropathies
  • Bleeding disorders
  Contacts and Locations
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Please refer to this study by its identifier: NCT00060970

United States, Pennsylvania
MMRRCC, University of Pennsylvania
Philadelphia, Pennsylvania, United States, 19104
Sponsors and Collaborators
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
Principal Investigator: Krista Vandenborne, Ph.D., P.T. University of Pennsylvania, Department of Physiology
  More Information

Additional Information:
Publications: Identifier: NCT00060970     History of Changes
Other Study ID Numbers: R29HD033738 ( U.S. NIH Grant/Contract )
Study First Received: May 16, 2003
Last Updated: June 23, 2005

Keywords provided by Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD):
Disuse atrophy
Ankle fracture
Exercise, therapy
Cast immobilization

Additional relevant MeSH terms:
Muscle Weakness
Muscular Atrophy
Pathological Conditions, Anatomical
Muscular Diseases
Musculoskeletal Diseases
Neuromuscular Manifestations
Neurologic Manifestations
Nervous System Diseases
Pathologic Processes
Signs and Symptoms processed this record on August 18, 2017