Does lateral fusion free up pinched nerves without opening the spinal canal?
Indirect foraminal decompression after lateral transpsoas interbody fusion
In simple words
When a spacer is placed in the disc space from the side, it lifts the vertebrae apart. This study measured how much extra room that creates for the nerves that exit the spine.
What the study looked at
CT scans of patients before and after lateral transpsoas interbody fusion, measuring disc height, the size of the nerve openings (foramina) and where the spacer sat.
What it found
The nerve openings grew by about 35% on average, and disc height increased at the front and back, wherever the spacer was placed. Patients' disability and quality-of-life scores improved, but that improvement was not directly linked to how much the openings enlarged.
Why it matters for patients
Restoring disc height can relieve pressure on nerves 'indirectly', without opening the spinal canal. Pain has many causes, so surgeons still judge each patient individually.
Authors: Kepler CK, Sharma AK, Huang RC, Meredith DS, Girardi FP, Cammisa FP Jr, Sama AA · J Neurosurg Spine 2012;16(4):329–333