A person’s
spine is subjected to a lot of forces throughout its lifetime. It may be
subjected to age related wear and tear or infections like tuberculosis. As a
result it undergoes degeneration which gives rise to a variety of problems like
spinal osteoarthritis, disc prolapse, spondylolisthesis, osteoporotic
fractures, vertebral collapse etc.
All these conditions manifest as severe
pain in the back and radiating pain, numbness, tingling in the upper or lower
extremities (lower leg or arm) due to compression of spinal nerves, spinal cord and spinal instability. When these symptoms become
debilitating enough to preclude the patient’s day to day activity, a Spinal
Fusion Surgery is advised.
The objective of this surgery is to fuse (join) to or more
adjacent vertebral segments that are diseased, so that they grow as one unit
and result in a more stable painless spine. The involved segment gives rise to
pain due to compression of surrounding soft tissue structures and nerves.
Spinal fusion also known as spondylodesis or spondylosyndesis aims at relieving
this compression and restoring the surrounding soft tissue elements and nerves
to their original shape and size, thereby eliminating the pain. It also
provides stability to the affected segments during movement at the spine. The
surgery is generally indicated for the lumbar spine as low back bears the
maximum brunt, but it may be advised for cervical (neck) or thoracic (mid back)
segments also.
Our spine consists of 33 small bones stacked one on top of the
other. They are separated by soft cushion like structures call intervertebral
discs which provide shock absorption and facilitate movements of the spine. The
Vertebral column encloses the delicate spinal cord within and the spinal nerves
leave the vertebral column through openings (foramen) present on the sides.
When these discs degenerate, herniated or when the intervertebral distance
reduces or when there are bony outgrowths (osteophytes) on the undersurface of
vertebral body, they encroach into the passage for the spinal nerves or the spinal
cord. This results in compression of the spinal nerves or spinal cord
manifesting as severe intractable pain in the back and the lower leg or arm.
Patients who are suffering from persistent back pain that has
not been relieved by conventional mode of treatment like rest, physical therapy
or medication or those suffering from any of the following chronic
conditions :-
•degenerative disc disease
•spinal disc herniation
•discogenic pain
•spinal tumor
•vertebral fracture
•scoliosis
•kyphosis (i.e, Scheuermann's disease)
•spondylolisthesis
•spondylosis
•Posterior Rami Syndrome
There are three types of spinal fusion procedures which differ
only in their access towards the affected spinal segment. The basic procedure
remains the same in all the three techniques. They are:
1) Anterior Lumbar Interbody Fusion (ALIF):The affected segment
is accessed through an incision in the abdomen
2) Posterior Lumbar Interbody Fusion (PLIF): The affected
segment is accessed through an
incision in the midline of the back
3) Transforaminal Lumbar Interbody Fusion (TLIF): The affected
segment is approached through a paraspinal ( at the side of the midline)
incision in the back.The Minimally Invasive TLIF approach is the preferred
method at our practice for interbody fusion as it is generally less traumatic
to the spine, is safer for the nerves, and allows for quicker recovery.
Minimally invasive type of spine surgery designed
to accomplish aspinal fusion
- · Minimal tissue damage
- · Minimal blood loss
- · Small incisions and scars
- · Minimal post-operative discomfort
- · Relatively quick recovery time and return to normal function.
Because of the above
factors, it is one of a number of options for spinal fusion that are relatively
minimally invasive. The XLIF is a type of interbody fusion, which is a category
of fusion in which the disc in the front of the spine is removed and replaced
with an implant containing a bone graft to set up the condition for the two
vertebrae to fuse together through the disc space.
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