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February 10, 2012

Minimally Invasive Lumbar Spinal Fusion

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Introduction to lumbar spinal fusion

The lumbar spine is the lower portion of the spine found at the center of the curve of the low back. This area can be a common source of pain. Low back pain is the second most common reason for visits to the family physician, behind only the common cold. As people become older, various changes occur in the lumbar spine that can cause pain. In most cases these changes are normal degenerative arthritis (wear of cartilage over time). The physician must also rule out other more serious conditions including tumor, infection, or fracture.

Fortunately, more than 90% of patients with low back pain will have improvement in their symptoms regardless of treatment within six weeks. During that time the physician has various treatment options including medications, physical therapy, or injections that can help ease the symptoms. Some of those patients that do not improve during the first six weeks may be candidates for surgery. The spine surgeon has different types of surgical options available based on the specific cause of pain.

What is lumbar spinal fusion?

Lumbar spinal fusion is an operation that causes the bones of the spine in the lower back to grow together. The goal of the lumbar fusion is to have the two vertebrae fuse (grow solidly together) so that there is no longer any motion between them. Removing the intervertebral disc or bone spurs can reduce some of the pressure on the nerves, helping to reduce pain. Additionally, by fusing the two vertebrae together this will stop the formation of bone spurs at that location, further reducing pain and potential nerve injury.

There are many different specific techniques to try to fuse the vertebrae together. The surgery can be performed either through an incision in the back, the abdomen, or a combination of both. In many cases metal screws and rods are placed from the back into the bones to hold them steady while the fusion occurs. During an interbody fusion, the surgeon removes the intervertebral disc and places either a piece of bone or a metal or plastic cage in its place. The decision on what type of fusion is best for each patient is based on their specific complaints and the cause of symptoms. Spinal fusion can be very effective in the properly selected patient.




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    • Lower Back Pain
      • There are many causes of back pain. Pain in the low back can relate to the bony lumbar spine, discs between the vertebrae, ligaments around the spine and discs, spinal cord and nerves, muscles of the low back, internal organs of the pelvis and abdomen, and the skin covering the lumbar area.
    • Pinched Nerve
      • A pinched nerve can be caused of a variety of conditions, for example, carpal tunnel syndrome, herniated disc, sciatica, arthritis, spinal stenosis, trauma, and more. Common symptoms of a pinched nerve include pain, numbness, tingling, and weakness. Treatment of a pinched nerve depends on the cause of the pinched nerve.
    • Osteoarthritis
      • Osteoarthritis is a type of arthritis caused by inflammation, breakdown, and eventual loss of cartilage in the joints. Also known as degenerative arthritis. Osteoarthritis can be caused by aging, heredity, and injury from trauma or disease.
    • Degenerative Disc Disease & Sciatica
      • Degenerative disc disease makes the disc more susceptible to herniation (rupture) which can lead to localized or radiating pain. The pain from degenerative disc or joint disease of the spine is usually treated conservatively with intermittent heat, rest, rehabilitative exercises and medications to relieve pain, muscle spasm and inflammation.
    • Spondylolisthesis
      • The five types of spondylolisthesis include 1) dysplastic, 2) isthmic, 3) degenerative, 4) traumatic, and 5) pathologic. The most common symptom of spondylolisthesis is lower back pain. Treatment depends on the type and severity of spondylolisthesis. Surgery is required in some cases of spondylolisthesis.
    • Pain Management
      • Pain management and treatment can be simple or complex, according to its cause. There are two basic types of pain, nociceptive pain and neuropathic pain. Some causes of neuropathic pain includes: complex regional pain syndrome, interstitial cystitis, and irritable bowel syndrome. There are a variety of methods to treat chronic pain, which are dependant on the type of pain experienced.
    • Chronic Pain
      • Chronic pain is pain (an unpleasant sense of discomfort) that persists or progresses over a long period of time. In contrast to acute pain that arises suddenly in response to a specific injury and is usually treatable, chronic pain persists over time and is often resistant to medical treatments.
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Spinal Fusion

What is spondylolisthesis?

Spondylolisthesis (spon + dee + lo + lis + thee + sis) is a condition of the spine whereby one of the vertebra slips forward or backward compared to the next vertebra. Forward slippage of one vertebra on another is referred to as anterolisthesis, while backward slippage is referred to as retrolisthesis. Spondylolisthesis can lead to a deformity of the spine as well as a narrowing of the spinal canal (central spinal stenosis) or compression of the exiting nerve roots (foraminal stenosis).

What causes spondylolisthesis?

There are five major types of lumbar spondylolisthesis.

  1. Dysplastic spondylolisthesis: Dysplastic spondylolisthesis is caused by a defect in the formation of part of the vertebra called the facet that allows it to slip forward. This is a condition that a patient is born with (congenital).
  2. Isthmic spondylolisthesis: In Isthmic spondylolist...

Read the Spondylolisthesis article »







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