Instrumented posterior lumbar interbody fusion

Surgical procedure for spinal fusion

Instrumented posterior lumbar interbody fusion (PLIF) is a surgical technique used to achieve spinal fusion in the lumbar region of the spine. This procedure is commonly employed to treat conditions such as degenerative disc disease, spondylolisthesis, and spinal stenosis. The goal of PLIF is to stabilize the affected vertebrae, relieve pain, and restore function.

Surgical Technique

Instrumented posterior lumbar interbody fusion procedure

The PLIF procedure involves several key steps:

Patient Positioning

The patient is positioned prone on the operating table. This position allows the surgeon access to the posterior aspect of the lumbar spine.

Incision and Exposure

A midline incision is made over the lumbar spine. The paraspinal muscles are retracted to expose the lamina and facet joints of the affected vertebrae.

Laminectomy and Discectomy

A laminectomy is performed to remove the lamina and decompress the spinal canal. The intervertebral disc is then removed (discectomy) to prepare the space for fusion.

Interbody Fusion

Bone graft material, often harvested from the patient's iliac crest or using synthetic alternatives, is placed into the intervertebral space. Interbody cages may also be used to maintain disc height and provide additional support.

Instrumentation

Pedicle screws and rods are inserted to provide stability to the spine. These instruments help maintain the alignment of the vertebrae and facilitate the fusion process.

Closure

The surgical site is closed in layers, and the patient is monitored during recovery.

Indications

PLIF is indicated for patients with:

• Degenerative disc disease
• Spondylolisthesis
• Spinal stenosis
• Recurrent disc herniation
• Spinal instability

Advantages and Disadvantages

Advantages

• Direct decompression of neural elements
• Restoration of disc height and alignment
• High fusion rates due to the use of instrumentation

Disadvantages

• Potential for nerve root injury
• Risk of infection
• Longer recovery time compared to non-instrumented fusion

Recovery and Rehabilitation

Postoperative care includes pain management, physical therapy, and gradual return to activities. Patients are typically advised to avoid heavy lifting and twisting motions during the initial recovery period.

Complications

Potential complications of PLIF include:

• Infection
• Nerve damage
• Nonunion or pseudarthrosis
• Hardware failure

Related Pages

• Spinal fusion
• Degenerative disc disease
• Spondylolisthesis
• Spinal stenosis