Treatment / Spine / Lateral Lumbar Interbody Fusion

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SPINE | LAS VEGAS

Lateral Lumbar Interbody Fusion

Dr. Andrew Lee, MD | Nevada Spine Clinic, Las Vegas, Nevada

Understanding the Lumbar Spine

The lumbar spine consists of five vertebrae at the base of the back, supporting the majority of body weight. Between each vertebra lies an intervertebral disc that cushions load and allows movement. The lumbar spine also houses the nerve roots that travel down into the legs.


When lumbar discs degenerate or vertebrae slip out of alignment, nerve roots can become compressed, producing leg pain, numbness, or weakness. Dr. Andrew Lee at Nevada Spine Clinic in Las Vegas evaluates lumbar pathology carefully before recommending any surgical approach.

Common Lumbar Conditions Treated

  • Degenerative Disc Disease: Loss of disc height and hydration in the lumbar spine causes instability, nerve compression, and chronic lower back pain.
  • Spondylolisthesis: Slippage of one vertebra forward over another narrows the spinal canal and foramen, compressing nerve roots and causing leg symptoms.
  • Lumbar Stenosis with Instability: Narrowing of the lumbar spinal canal combined with instability between vertebrae may require both decompression and fusion.
  • Lumbar Deformity: Degenerative scoliosis or sagittal imbalance in the lumbar spine can cause pain and neurological symptoms requiring correction and stabilization.

Conservative Non-Surgical Care

Dr. Andrew Lee at Nevada Spine Clinic in Las Vegas evaluates all lumbar fusion candidates for non-surgical options first. Physical therapy focused on core strengthening and lumbar stabilization, anti-inflammatory medications, and epidural steroid injections can provide meaningful relief for many patients.

Surgical intervention is considered only when symptoms have not responded to adequate conservative care or when progressive neurological signs are present.

Lateral Lumbar Interbody Fusion

Lateral lumbar interbody fusion is a minimally invasive surgical approach that allows Dr. Andrew Lee to access the lumbar spine through a small incision on the patient’s side, completely avoiding the large back muscles. This approach significantly reduces tissue disruption compared to traditional posterior fusion techniques.

Dr. Lee performs LLIF at Southern Hills Hospital in Las Vegas using specialized instruments to work through the psoas muscle to reach the disc space from a lateral direction. The damaged disc is removed and a large interbody cage filled with bone graft material is placed in the disc space. This restores disc height, corrects alignment, and creates the conditions for bone fusion.

Posterior supplemental fixation with screws and rods is often added in a second step to provide rotational stability. The minimally invasive lateral approach results in less blood loss, shorter hospital stays, and faster recovery compared to open posterior approaches for many patients.

The primary goals of this procedure are to:
  • Decompress nerve roots by restoring disc height and correcting alignment
  • Stabilize the lumbar spine at the affected level or levels
  • Achieve solid bone fusion with minimal muscle disruption
  • Reduce lower back pain and leg symptoms

Potential Risks

  • Thigh numbness or weakness: The approach passes near the femoral nerve and lumbar plexus. Temporary numbness or hip flexor weakness on the approach side occurs in a minority of patients and typically resolves.
  • Nerve root injury: Risk of permanent neurological deficit is low but present.
  • Infection: Preventive antibiotics are given. Proper wound care during recovery is essential.
  • Incomplete fusion: Some patients may not achieve solid bone fusion, particularly smokers or those with osteoporosis.
  • Hardware complications: Cage migration or screw loosening is uncommon but may require revision in rare cases.

Postoperative Recovery and Rehabilitation

One of the advantages of the lateral approach is faster recovery compared to traditional open lumbar fusion. Most patients are walking the same day or the day after surgery. Dr. Lee encourages early mobilization to promote healing and reduce complications.

A lumbar brace may be prescribed for several weeks. Physical therapy focused on core stabilization is typically started four to six weeks after surgery. Full recovery and return to unrestricted activity generally occurs between three and six months.

What to Expect After Surgery

Leg pain and radicular symptoms often improve quickly as nerve root pressure is relieved by the restoration of disc height. Lower back pain improvement may be more gradual as the fusion heals.

Temporary thigh numbness or hip flexor weakness on the approach side is common and resolves in the majority of patients within weeks to months.

Patients should not drive until Dr. Lee provides specific clearance at follow-up.

Do not soak your wound.

No bathtub, swimming, or hot tub until cleared by Dr. Lee.

Wound Care and Medication Management

The lateral incision is typically small and heals quickly. Avoid soaking the wound in water until cleared by Dr. Lee. Follow showering instructions provided at discharge.

Pain medications should be taken as prescribed. For refills, contact your pharmacy at least forty-eight hours in advance. Refills are not processed on weekends or after office hours.

Activity Guidelines After Surgery

Wear the lumbar brace as instructed during the early recovery period. Avoid bending, twisting, and lifting beyond prescribed limits until Dr. Lee clears progressive
activity.

Walking is the most important early activity. Begin with short frequent walks and gradually increase duration over the first six weeks. Contact Nevada Spine Clinic or go to the emergency room for sudden neurological changes, fever, or significantly worsening pain.

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No bathtub, swimming, or hot tub until cleared by Dr. Lee.

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Dr. Andrew Lee, MD | Nevada Spine Clinic, Las Vegas

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