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Hip dislocation in spinal muscular atrophy.

C Granata1, E Magni, L Merlini

  • 1Servizio di Recupero e Rieducazione Funzionale, Istituto Ortopedico Rizzoli, Bologna.

La Chirurgia Degli Organi Di Movimento
|April 1, 1990
PubMed
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Spinal muscular atrophy (SMA) patients with hip issues show higher dislocation rates in the intermediate form. Walking, with or without orthoses, appears crucial for preventing hip dislocation in SMA patients.

Area of Science:

  • Orthopedics
  • Neuromuscular Disorders
  • Genetics

Background:

  • Spinal muscular atrophy (SMA) is a genetic neuromuscular disorder.
  • Hip conditions are a common complication in SMA patients.
  • Understanding hip development in SMA is critical for patient management.

Purpose of the Study:

  • To investigate the prevalence and characteristics of hip conditions in patients with different forms of spinal muscular atrophy.
  • To identify factors influencing hip stability and dislocation in SMA.

Main Methods:

  • Study included 49 patients with spinal muscular atrophy (35 intermediate, 14 mild).
  • Perkins method used to measure femoral head migration percentage.
  • Correlation analysis performed between hip migration, age, scoliosis, and ambulation status.

Related Experiment Videos

Main Results:

  • Intermediate SMA form: 31% normal hips, 38% subluxation, 11% dislocation.
  • Mild SMA form: 50% normal hips, 28% subluxation, 22% dislocation.
  • Walking ability (with/without orthoses) was associated with a lack of hip dislocation.

Conclusions:

  • Hip dislocation is more prevalent in the intermediate form of SMA.
  • Age and scoliosis correlate with hip migration in intermediate SMA.
  • Ambulation, facilitated by walking or orthoses, is a key protective factor against hip dislocation in SMA.