Background And Purpose: The purpose was to report the results of ultrasound-guided lumbar puncture for the administration of nusinersen in spinal muscular atrophy (SMA) patients with complex spines.
Methods: Eighteen SMA patients (five children, five adolescents and eight adults) with either severe scoliosis or spondylodesis were evaluated for ultrasound-guided lumbar puncture. Ultrasound was performed with a 3.5 MHz transducer to guide a 22 gauge × 15 mm needle, which was placed in the posterior lumbar space following a parasagittal interlaminar approach.
Results: Twelve patients had undergone spinal instrumentation (nine growing rods and three spinal fusion) whilst the other six showed severe scoliosis. Success was achieved in 91/94 attempts (96.8%), in 14/18 patients (77.8%), including 100% of children and adolescents and 50% of adult patients. In two of the unsuccessfully treated patients, computed tomography and fluoroscopy-guided transforaminal lumbar punctures were also tried without success. After a median follow-up of 14 months, only few adverse events, mostly mild, were observed.
Conclusion: The ultrasound-guided lumbar puncture, following an interlaminar parasagittal approach, is a safe and effective approach for intrathecal treatment with nusinersen in children, adolescents and carefully selected adult SMA patients with complex spines and could be considered the first option in them.
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