Interspinous process device versus standard conventional surgical decompression for lumbar spinal stenosis:...

Area of Science:

• Neurosurgery
• Orthopedics
• Spinal Surgery

Background:

• Lumbar spinal stenosis with intermittent neurogenic claudication often requires surgical intervention.
• Interspinous process devices are an alternative to traditional decompression surgery.
• The comparative effectiveness of these treatments requires rigorous evaluation.

Purpose of the Study:

• To compare the short-term effectiveness of interspinous process device implantation versus conventional surgical decompression.
• To evaluate outcomes in patients with intermittent neurogenic claudication due to lumbar spinal stenosis.

Main Methods:

• A randomized controlled trial was conducted across five neurosurgical centers in the Netherlands.
• 159 participants with lumbar spinal stenosis were randomized to receive either an interspinous process device (80 participants) or spinal bony decompression (79 participants).
• The primary outcome measure was the Zurich Claudication Questionnaire score at eight weeks and one year, with repeated measurements.

Main Results:

• At eight weeks, the success rate for interspinous process devices (63%) was not superior to standard bony decompression (72%).
• No significant differences in disability or other outcomes were observed between the groups within the first year.
• The interspinous implant group experienced a substantially higher rate of repeat surgery (29%) compared to the conventional group (8%).

Conclusions:

• The study did not confirm a short-term advantage of interspinous process device implantation over conventional decompression.
• A high reoperation rate was observed following interspinous process device implantation.
• Conventional decompression appears to be a more reliable surgical option for this patient group.