A Posterior Lumbar Laminectomy with Instrumentation and Fusion is a surgical procedure designed to alleviate pain caused by spinal stenosis. It involves the removal of the lamina, the bony plate on the back of a vertebra, to create space for the spinal nerves. When spine instability is present, bone grafts are added to fuse the vertebrae, and stabilizing instrumentation is inserted. This process is critical for maintaining spinal stability after the laminectomy. Dr. Atlas notes that a laminectomy alone can provide significant pain relief, with an 80% to 90% success rate.
Preparing for spinal fusion involves using a bur to remove the cortical layer of the articular processes. This prepares the site for the fusion of vertebrae where bone was removed. The placement of bone grafts is a meticulous process that ensures the fusion will stabilize the spine. A thoracic laminectomy follows a similar approach but is specifically tailored for removing tumors and relieving pressure on the spinal cord.
Recovery times for these surgeries can vary, ranging from 1-2 days for simpler procedures like a single-level fusion, up to 6-8 days for more extensive 12+ level fusions. Techniques for achieving fusion in the lumbar spine fall into three categories: posterior and posterolateral fusion (PLF) procedures, lumbar interbody fusion (LIF) procedures, and lumbar corpectomy and vertebral body replacement.
A foraminotomy is often performed alongside a laminectomy. In cases of extensive bone removal or pre-existing weakness in the spine, a spinal fusion is conducted to ensure spinal column stability. This involves the insertion of a bone graft that joins two or more vertebrae into a single unit.
For more details on these spine surgeries, please refer to the comprehensive guides provided by HSS, Harvard Health, UCSF Anesthesia, and Columbia Neurosurgery.
