Frequently Asked Questions
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When considering
the indications for lumbar spine fusion, low back pain that lasts
for more than six months is the most general indication. The
indications for fusing the vertebrae of the low back occur primarily
in situations where there is a large deformity, such as:
Mechanical
back pain (usually attributed to disc degeneration)
Spinal
stenosis (narrowing of the spinal canal)
Recurrent
disc herniation
Fractures
Tumors
Degenerative scoliosis
Spinal
instability (spondylolisthesis)
Revision
of total disc replacement
Diagnostic Tools
Patient history
Physical Exam
X-Rays, Magnetic Resonance Image (MRI) or CT Scan
Discogram
EMGs
Myelogram and CT Scan
Treatment Alternatives
Medications
Physical therapy (Exercises and stretching)
Chiropractic Manipulation
Epidural
Steroid Injections (ESIs)
TENS Units
Purpose of Procedure
The
primary purpose of this procedure is to stabilize the spine by
restoring the disc height and fusing the vertebra together using the
patient's own bone or a genetically engineered substance known as Bone
Morphogenetic Protein (BMP). XLIF fuses the vertebra of the spine
through an approach from the side of the body. The spine is accessed
thru 2 small incisions – one directly over the side of your waist and
the other incision slightly behind the first, toward your back
muscles. This approach is made safe with the use of nerve monitoring
technology that alerts the surgeon if he comes near or hits a nerve.
Bone for Fusion
There are
currently two primary alternative sources for the bone needed for the
spinal fusion. Traditionally, some of the patient's own bone has been
harvested from the iliac crest (hip bone). This technique produces
excellent results for the fusion.
Earlier
in 2003, the FDA approved a genetically engineered bone substitute for
use in lumbar spinal fusions. Under the brand name, InFUSE, BMP
converts stem cells into bone forming cells and stimulates rapid
growth of bone at the targeted site.
Using BMP
eliminates the need for harvesting the patient's own bone and speeds
up the fusion process.
Advantage of XLIF Approach
The XLIF
procedure has several theoretical advantages over some other
approaches to lumbar fusion:
·
Reduced operative time, and thus, reduced
time under anesthesia
·
Reduced blood loss and minimal scarring
·
Reduced post operative pain because the
approach does not disrupt
sensitive back muscles, bones and ligaments
·
Reduced hospital stay – patients usually
up and walking the same day
·
Typical recovery is usually about 6
weeks
Who will be involved in
procedure?
Surgeon - The orthopedic surgeon that you
have been seeing in our office will be your primary surgeon, in charge
of your surgery.
Assistant Surgeon - Another orthopedic
surgeon, usually from our office, will assist your orthopedic surgeon
with the procedure. This is done to minimize the length of time you
are under general anesthesia and to provide the necessary assistance
with the actual surgical procedure.
Anesthesiologist - The doctor who actually
administers and monitors the anesthesia is a critical part of the
surgical team. You will normally meet with the Anesthesiologist
during your Pre Op appointment at the hospital.
Neuro
Monitor – Because of the surgical approach,
nerve monitoring is used to alert the surgeon if he is close to or
touching a vital nerve during the procedure.
Hospital Stay
With most
spinal surgeries, patients are up and walking within hours after their
procedure, although the walking is very limited. It is no longer
necessary, or recommended, that you lie in bed for days or weeks after
spine surgery. Nurses who are experienced in working with spinal
surgery patients will assist you during your first few efforts at
getting out of bed and walking. Your doctor will tell you when it is
safe to shower after surgery. He may put you into a back brace to
wear for comfort while the fusion is progressing.
Incision Care
The
nursing staff at the hospital will show you how to keep the dressing
dry and in place to protect the incision while showering. The wound
should not be submerged in water (pool or tub) until it has healed and
has been cleared by your doctor. The nurse will change the dressing
after your shower, and again later if necessary.
Your
surgical incision will be checked during your first Post Op
appointment. However, should your incision become red and tender or
drainage occurs, prior to your first scheduled Post Op visit, you
should contact our office for instructions.
Risks and Potential
Complications
Infection
Bleeding
Complications from Anesthesia
Continued Low Back Pain
Fusion May Not Occur (higher incidence of non-fusion in
patients who smoke)
Hardware (ie. pedicle screws or cages) may break or
come loose
Numbness
Nerve Damage
Weakness
Loss of Sexual Function
Infertility
Death
Return to Routine of Normal
Daily Living
It
normally takes approximately 3 to 6 months for the fusion to occur.
During that time you should avoid strenuous activities that might
affect the fusion process. During the rehabilitation process it is
important to recondition the muscles with exercise, stretching and
aerobic conditioning.
No Guarantees
No guarantees can be made as to the success of this
procedure.
Other Educational Resources
www.lateralaccess.org/patient/xlif_procedure
www.spine-health.com
www.spineuniverse.com
www.spine-surgery.com
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XLIF FAQs