Vol. 90, No. 3, March 2010, pp. 411-419
DOI: 10.2522/ptj.20080365
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Technical Reports |
McConnell Taping Shifts the Patella Inferiorly in Patients With Patellofemoral Pain: A Dynamic Magnetic Resonance Imaging Study
A. Derasari, is Howard Hughes Medical Fellow, Department of Orthopaedics, University of Miami, Miami, Florida.
T.J. Brindle, PT, PhD, ATC, is Postdoctoral Candidate, Functional and Applied Biomechanics Section, Rehabilitation Medicine Department, National Institutes of Health, Bethesda, Maryland, a collaboration between the National Institute of Child Health and Human Development and the Clinical Center, National Institutes of Health.
K.E. Alter, MD, is Senior Clinician, Functional and Applied Biomechanics Section, Rehabilitation Medicine Department, National Institute of Child Health and Human Development, National Institutes of Health, and Medical Director, Rehabilitation Programs, Mt Washington Pediatric Hospital, Baltimore, Maryland, an affiliate of Johns Hopkins Health System Corp and Maryland Medical System Corp.
F.T. Sheehan, PhD, is Staff Scientist, Functional and Applied Biomechanics Section, Rehabilitation Medicine Department, National Institutes of Health, Building 10, CRC Room 1-1469, 10 Center Dr, MSC 1604, Bethesda, MD 20892-1604 (USA).
Address all correspondence to Dr Sheehan at: fsheehan{at}cc.nih.gov.
Background: Patellar taping is widely used clinically to treat patients with patellofemoral pain syndrome (PFPS). Although patellar taping has been demonstrated to reduce patellofemoral pain in patients with PFPS, the kinematic source for this pain reduction has not been identified.
Objective: The purpose of this study was to quantify the changes in the 6-degrees-of-freedom patellofemoral kinematics due to taping in patients with PFPS.
Design: A within-subject design and a sample of convenience were used.
Participants: Fourteen volunteers (19 knees) who were diagnosed with patellofemoral pain that was present for a year or longer were included. Each knee had to meet at least 1 of the following inclusion criteria: Q-angle of 
15 degrees, a positive apprehension test, patellar lateral hypermobility (10 mm), or a positive "J sign."
Methods: Each knee underwent 2 randomly ordered testing conditions (untaped and taped). A full fast-phase contrast (PC) magnetic resonance image set was acquired for each condition while the participants volitionally extended and flexed their knee. Three-dimensional displacements and rotations were calculated through integration of the fast-PC velocity data. Statistical comparisons between baseline patellofemoral kinematics and the change in kinematics due to taping were performed using a 2-tailed paired Student t test. Correlations between baseline patellofemoral kinematics and the change in kinematics due to taping also were quantified.
Results: Patellar taping resulted in a significant patellofemoral inferior shift. The strongest correlation existed between the change in lateral-medial displacement with taping and baseline (r=–.60).
Conclusions: The inferior shift in patellar displacement with taping partially explains the previously documented decrease in pain due to increases in contact area. The lack of alteration in 5 of the 6 kinematic variables with taping may have been due to the fact that post-taping kinematic alterations are sensitive to the baseline kinematic values.
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