Shoulder magnetic resonance imaging abnormalities, wheelchair propulsion, and gender

  • Boninger M
  • Dicianno B
  • Cooper R
 et al. 
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OBJECTIVE: To investigate the relationship between pushrim forces and the progression of shoulder injuries in manual wheelchair users. DESIGN: Longitudinal case series. SETTING: Biomechanics laboratory and magnetic resonance imaging (MRI) facility at a Veterans Health Administration medical center and university hospital, respectively. PARTICIPANTS: Fourteen individuals with spinal cord injury (8 men, 6 women) who used manual wheelchairs. INTERVENTION: Subjects propelled their own wheelchairs on a dynamometer at 0.9 and 1.8m/s. Bilateral biomechanical data were obtained by using force and moment sensing pushrims at time 1. Bilateral shoulder MR images were also completed on 2 occasions, at time 1 and, approximately 2 years later, at time 2. MAIN OUTCOME MEASURES: The peak pushrim forces in a pushrim coordinate system were calculated, weight normalized and averaged over 5 strokes (presented as % body weight). MRI abnormalities were graded by using a summated scale. Differences between scores between times 1 and 2 were calculated. RESULTS: Subjects were divided into 2 groups based on change in MRI score. Seven subjects were in the group with worsening scores (MRI+; mean, 8.14 points; range, 5-16), and 7 were in the group with improving or unchanging scores (MRI-; mean, -1.00 point; range, -5 to 1). There was no significant difference between groups with respect to age, body mass index, or years from injury. There were significantly more women in the MRI+ group (6 women, 1 man) than in the MRI- group (7 men) (P=.001). The MRI+ group used significantly greater weight-normalized radial force, or force directed toward the axle at time 1, to propel their wheelchairs at each speed (P

Author-supplied keywords

  • Adult
  • Attention
  • Biomechanics
  • Body Weight
  • Female
  • Human
  • Laboratories
  • Logistic Models
  • Longitudinal Studies
  • Magnetic Resonance Imaging
  • Male
  • Risk
  • Sex Factors
  • Shoulder
  • Spinal Cord
  • Spinal Cord Injuries
  • Support,Non-U.S.Gov't
  • Support,U.S.Gov't,Non-P.H.S.
  • Support,U.S.Gov't,P.H.S.
  • Technology
  • Time
  • Wheelchairs
  • abnormalities
  • analysis
  • injuries
  • radiography
  • rehabilitation

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  • PMID: 14639560


  • M L Boninger

  • B E Dicianno

  • R A Cooper

  • J D Towers

  • A M Koontz

  • A L Souza

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