Spinal fusion in Duchenne's muscular dystrophy

Area of Science:

• Orthopedics
• Neurology
• Cardiology

Background:

• Duchenne muscular dystrophy (DMD) frequently leads to progressive scoliosis.
• Spinal deformities in DMD impact cardiorespiratory function and mobility.
• Surgical intervention, like spinal fusion, is considered for curve progression.

Purpose of the Study:

• To evaluate the outcomes of spinal fusion with Harrington instrumentation in DMD patients.
• To identify key factors influencing surgical timing and patient selection.
• To assess the benefits and complications associated with the procedure.

Main Methods:

• Retrospective review of 13 DMD patients who underwent spinal fusion and Harrington instrumentation (1967-1979).
• Analysis of indications for surgery, focusing on curve progression.
• Assessment of cardiorespiratory status pre-operatively.
• Evaluation of post-operative fusion, complications, and functional outcomes (sitting balance).

Main Results:

• Curve progression was the primary indication for surgery.
• Cardiorespiratory status was critical for surgical timing.
• All patients achieved spinal fusion after 12 months of immobilization.
• Eight of 13 patients experienced major or minor complications.
• Improved or maintained sitting balance was the main functional benefit.

Conclusions:

• Spinal fusion with Harrington instrumentation can improve sitting balance in DMD patients.
• Careful pre-operative cardiorespiratory evaluation is essential for successful surgical timing.
• Surgery is contraindicated in patients with severe cardiomyopathy, poor vital capacity (<40%), nonfunctional cough, or rapidly declining muscle strength with a short life expectancy (<2 years).