XLIF & ALIF Minimally Invasive Fusion

What is XLIF & ALIF Minimally Invasive Fusion?

Fusion joins two vertebrae so they heal into one solid segment. Dr. Melamed uses it when fusion is actually needed: a segment that is unstable, slipping, or collapsed, where decompression alone or a disc replacement would not hold up. Before he recommends it, he looks at whether biportal endoscopic decompression or artificial disc replacement could solve the problem and keep the segment moving.

When fusion is the right call, the approach matters. XLIF (extreme lateral interbody fusion) reaches the disc through a small incision in the side of the body. ALIF (anterior lumbar interbody fusion) reaches it through a small incision in the lower abdomen. Neither one cuts through the muscles of the back, and both let the surgeon clear out the worn disc and place a large spacer that restores the height between the vertebrae.

The level decides a lot. The bottom lumbar level (L5-S1) sits behind the pelvis, so it is usually reached from the front. Levels higher in the lumbar spine can often be reached from the side. Some patients need both, and some need small screws placed through the skin from the back to hold everything while the bone heals. Dr. Melamed picks the approach to fit your anatomy, not the other way around.

Am I a candidate for XLIF & ALIF Minimally Invasive Fusion?

XLIF or ALIF is considered for lumbar problems where the segment needs to be stabilized: spondylolisthesis (one vertebra slipping on another), a disc that has collapsed and pinched the nerve openings, instability seen on bending X-rays, degenerative scoliosis, or a level that broke down next to an earlier fusion. Conservative care should have been tried first.

It is not the answer for a simple herniated disc or a pinched nerve that endoscopic decompression can free. If your imaging shows a worn disc in an otherwise stable segment, Dr. Melamed will talk with you about disc replacement before fusion.

How does XLIF & ALIF Minimally Invasive Fusion work?

For XLIF, you lie on your side. Through a small incision in the flank, Dr. Melamed passes through the psoas muscle to the side of the spine, with nerve monitoring used throughout because the nerves of the lumbar plexus run through that muscle. The disc is removed and a spacer packed with graft material is placed across the full width of the disc space.

For ALIF, you lie on your back. Through a small incision in the lower abdomen, the abdominal contents and major blood vessels are gently moved aside to reach the front of the spine. This gives a wide view of the disc space and room for a large implant, which is why it suits the L5-S1 level.

With either approach, restoring disc height can widen the openings where the nerves exit, taking pressure off them without working directly around the nerves. Screws may be added through small incisions in the back. Over the following months, bone grows through the spacer and fuses the segment.

What is recovery like?

Because the back muscles are not cut, early recovery is often easier than after a traditional fusion from the back. Walking starts the day of or the day after surgery, and many patients go home within a day or two depending on the number of levels. The fusion itself takes months to mature, so activity is rebuilt in stages. Dr. Melamed keeps the recovery plan narcotic-sparing and follows the healing with imaging.

What are the benefits of XLIF & ALIF Minimally Invasive Fusion?

• ✓Back muscles are not cut in either approach
• ✓Large spacer restores disc height and can open the nerve passages
• ✓Approach chosen to fit the level being treated
• ✓Screws placed through small incisions when needed
• ✓Used only after motion-preserving options have been considered

What conditions does XLIF & ALIF Minimally Invasive Fusion treat?

• Spondylolisthesis (a slipping vertebra)
• Collapsed disc with narrowed nerve openings
• Lumbar instability confirmed on imaging
• Degenerative scoliosis in the lower back
• Breakdown of the level next to a prior fusion