Minimally Invasive Spinal Fusion Surgery in India - Best Spine Surgery Hospital India

Minimally Invasive SpinalFusion Surgery 

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.

What is Spinal Fusion Surgery?

The surgical procedure of spinal fusion (back fusion surgery) is performed to join one or more bony vertebrae of the spine permanently. This highly advanced procedure (disc fusion surgery) is an option for disability and pain in the spine which has been caused by some lesion and was not able to improve by other non surgical options such as medications or physiotherapy. Diseases, natural aging process and injuries are some of the causes for an unstable spine. These changes consents the abnormal movement of vertebrae and in turn the vertebrae starts to rub against each other. This can lead to either arm, back or leg pain. By fusing the vertebrae, it aligns and stabilizes the spine thereby maintaining the disc space in between the vertebrae. It saves from further damage of spinal cord and nerves.

When is Fusion Recommended

• Fracture
• Tumor
• Infection
• Spondylolisthesis
• Degenerative disc disease
• Scoliosis
• Spinal Stenosis

Types of Spinal Fusion Surgery

Lumbar spinal fusion can be divided into two categories-

Posterolateral Fusion : In the back of the spine, the bone graft is placed in amid the transverse processes. With the help of wires and screws, the vertebrae is carefully fixed throughout the particles of every vertebrae. A rod is made up of metal which is attached on the side of vertebrae.

Interbody Fusion : In this, the graft of the bone is placed in between the vertebrae and the area is generally engaged by the intervertebral disc. The disc is entirely removed in preparing for the spinal fusion. In order to maintain the disc height and spine alignment, a device can be placed in between the vertebrae. This device (intervertebral device) can either be prepared from titanium or plastic. Then the fusion starts in between the vertebrae’s endplates. Interbody fusion is of 3 types-

• Posterior Lumbar Interbody Fusion (PLIF)
• Transforaminal Lumbar Interbody Fusion (TLIF)
• Anterior Lumbar Interbody Fusion (ALIF)
• Transpsoas Interbody Fusion (XLIF or DLIF)

Posterior Lumbar Interbody Fusion (PLIF)

In Posterior lumbar interbody fusion, the spinal fusion is achieved through a surgical incision made on the posterior (back) aspect of spine. It aims at fusion of two adjacent vertebrae in cases of spinal instability and associated back pain. It is a popular procedure as it gives excellent results. The procedure provides almost complete relief of symptoms in 90-95% of the cases and the patients are able to return to their daily activities within a few weeks. The patients can also return to most of their recreational activities.

Procedure for Posterior Lumbar Interbody Fusion (PLIF)

PLIF surgery aims at achieving spinal stability through bony fusion by two ways:

The Open PLIF is the traditional technique which is performed using general anesthesia. The patient is made to lie down on his front side on the table with the low back exposed. A 3-6 inch long incision is made on the skin overlying the affected vertebrae. The skin and the fascia are cut open. The underlying muscles are retracted and the affected vertebrae are identified.  Fluoroscopic X-ray is used to confirm the exact location of the affected vertebrae. Then a complete laminectomy (removal of the lamina of the vertebrae) followed by bilateral foraminotomy (enlargement of the foramen by removing the bony spurs) and/or discectomy (removal of offending disc) are performed.

This relieves the compression off the spinal nerves, allowing them to come to their normal size and shape. The area is checked for any remaining bony outgrowth or disc fragments that may compress the nerves. Autogenic bone grafts or Metal or plastic implants are fitted in the empty disc space for initiating bone growth.

Minimally Invasive Posterior Lumbar Interbody Fusion (PLIF)

The other method is the Minimally Invasive PLIF procedure which is performed using x-ray guidance. 2.5-cm incisions are made on either side of the lower back

The muscles are gradually dilated and tubular retractors inserted to allow access to the affected area of the lumbar spine. The lamina is removed to allow visualization of the nerve roots. The offending disc material is removed from the spine and replaced with a bone graft and structural support from a cage made of bone, titanium, carbon-fiber, or a polymer, followed by placement of rod and screws. The tubular retractors are removed, allowing the dilated muscles to come back together, and the incisions are closed.

This procedure typically takes about 3 to 3 ½ hours to perform. There was less blood loss,tissue trauma, operative time, and quick recovery in this procedure as compared to the traditional one.Generally the patients can go home within 3-5 days after traditional PLIF and within 1-2 days after a minimally invasive PLIF

eXtreme lateral Interbody Fusion (XLIF)

The XLIF (eXtreme Lateral Interbody Fusion) is an approach to spinal fusion in which the surgeon accesses the intervertebral disc space and fuses the lumbar spine (low back) using a surgical approach from the side (lateral) rather than from the front (anterior) or the back (posterior).

The XLIF is one of a number of spinal fusion options that a surgeon may recommend to treat specific types of lumbar spinal disorders, such as lumbar degenerative disc disease, spondylolisthesis, scoliosis and deformity and some recurrent lumbar disc herniations and types of lumbar stenosis. It cannot be used for all types of lumbar conditions for which spinal fusion is a treatment option. For example, it cannot treat conditions at the lowest level of the spine, L5-S1 or for some people at L4-L5.

Spinal Fusion Surgery Benefits

This procedure can remove the pain as well as other symptoms. The advantages include-

• There are less chances of going through a surgery again when the level has been fused. In many cases, the facets or discs are pain producer and a fusion will make sure that the motion at the level is stopped by removing the lower back pain.
• The surgery drastically reduces the post-decompressive deformity. It has been seen that most patients have developed post-laminectomy kyphosis (abnormal alignment of the spine).
• Before the surgery, fusion can also correct the deformities of the patients so as to make sure the proper alignment of the spine is done.

Posterior Lumbar Interbody Fusion (PLIF) Surgery in India | Best Spine Hospital India

Posterior Lumbar Interbody Fusion (PLIF) Surgery in India

A posterior lumbar interbody fusion (PLIF) is a type of spine surgery that can be performed in a minimally invasive way. Posterior lumbar interbody fusion (PLIF) is a type of spine surgery that involves approaching the spine from the back (posterior) of the body to place bone graft material between two adjacent vertebrae (interbody) to promote bone growth that joins together, or "fuses," the two structures (fusion). The bone graft material acts as a bridge, or scaffold, on which new bone can grow. The ultimate goal of the procedure is to restore spinal stability.

Today, a PLIF may be performed using minimally invasive spine surgery, which allows the surgeon to use small incisions and gently separate the muscles surrounding the spine rather than cutting them. Traditional, open spine surgery involves cutting or stripping the muscles from the spine. A minimally invasive approach preserves the surrounding muscular and vascular function, minimizes scarring, hastens recovery and decreases hospitalization stay.

How is it done?

PLIF surgery aims at achieving spinal stability through bony fusion by two ways: The Open PLIF is the traditional technique which is performed using general anesthesia. The patient is made to lie down on his front side on the table with the low back exposed. A 3-6 inch long incision is made on the skin overlying the affected vertebrae. The skin and the fascia are cut open. The underlying muscles are retracted and the affected vertebrae are identified. Fluoroscopic X-ray is used to confirm the exact location of the affected vertebrae. Then a complete laminectomy (removal of the lamina of the vertebrae) followed by bilateral foraminotomy (enlargement of the foramen by removing the bony spurs) and/or discectomy (removal of offending disc) are performed.

This relieves the compression off the spinal nerves, allowing them to come to their normal size and shape. The area is checked for any remaining bony outgrowth or disc fragments that may compress the nerves. Autogenic bone grafts or Metal or plastic implants are fitted in the empty disc space for initiating bone growth. Finally, pedicle screws are placed into the upper and lower vertebrae and connected with rods or plates. New bone is allowed to grow over these rods, helping to bridge the adjacent vertebrae and achieving interbody fusion. The total surgery time is approximately 3 to 6 hours, depending on the number of spinal levels involved.

The other method is the Minimally Invasive PLIF procedure which is performed using x-ray guidance: 2.5-cm incisions are made on either side of the lower back. The muscles are gradually dilated and tubular retractors inserted to allow access to the affected area of the lumbar spine. The lamina is removed to allow visualization of the nerve roots. The offending disc material is removed from the spine and replaced with a bone graft and structural support from a cage made of bone, titanium, carbon-fiber, or a polymer, followed by placement of rod and screws. The tubular retractors are removed, allowing the dilated muscles to come back together, and the incisions are closed. This procedure typically takes about 3 to 3 ½ hours to perform. There was less blood loss, tissue trauma, operative time, and quick recovery in this procedure as compared to the traditional one

Post-Operative Care after PLIF

Most patients are usually able to go home 3-5 days after surgery. Before patients go home, physical therapists and occupational therapists work with patients and instruct them on proper techniques of getting in and out of bed and walking independently. Patients are instructed to avoid bending at the waist, lifting (more than five pounds), and twisting in the early postoperative period (first 2-4 weeks) to avoid a strain injury. Patients can gradually begin to bend, twist, and lift after 4-6 weeks as the pain subsides and the back muscles get stronger.

Recovery from PLIF

Rehabilitation after PLIF can be a slow process. Many surgeons prescribe outpatient physical therapy beginning a minimum of six weeks after surgery. This delay is needed to make sure the graft has time to begin to fuse. You will probably need to attend therapy sessions for two to three months. You should expect full recovery to take up to eight months.

Spinal Fusion Benefits - Spinal Fusion Surgery in India

Spinal Fusion Surgery

Lumbar spinal fusion is a type of back surgery in which a bone graft is inserted in the spine so that the bones in a painful segment of the spine fuse together. The fusion aims to stop the motion at a vertebral segment, which should decrease the pain caused by the joint. After the surgery it will take several months (usually 3 to 6, but sometimes up to 18 months) before the fusion is set-up. This surgery has been improved over the last 10 to 15 years, allowing for better success rates, and shorter hospital stays and recovery time.

Indications and contraindications for spinal fusion

The vast majority of people with low back pain will not need fusion surgery and will be able to manage the pain primarily with physical therapy and conditioning. A fusion surgery may, however, be recommended for patients with: 

Before beginning the main part of a spinal fusion procedure, your surgeon will need to gather material for a bone graft, which is used later on to join the targeted spinal bones together. Depending on individual circumstances and your surgeon’s preferences, this graft material can come from bone harvested from one of your own hips or ribs, from bone harvested from a special donor cadaver, or from artificial materials such as plastics or ceramics.

Once the graft material is ready, your surgeon will make an incision and create an opening that exposes the site of the fusion. Potential locations of this incision include your abdomen, your back and the side of your neck or torso. After exposing the site of procedure and removing the spinal disc that sits between your spinal bones, your surgeon can place the bone graft in one of several ways. First, he can place the graft material directly into the empty space left by the removed spinal disc. Alternatively, he can place the graft material inside a device called a spacer or cage, then insert this device into the gap between your spinal bones. Your surgeon can also lay the graft material over the rear surfaces of the targeted spinal bones.

All of these techniques will lead to fusion of your bones and incorporation of the graft material by triggering your body’s natural healing process. Frequently, bone grafts are held in position by metal rods or plates and screws during this healing period.

Fusion surgery success rates vary between 70% and 95%, and there are several factors that will impact the success rate of the surgery, including:

·                     Low back pain caused by degenerative disc disease that limits the patient's ability to function (after non-surgical treatments, such as physical therapy and medication, have failed)

·                     Isthmic, degenerative or postlaminectomy spondylolisthesis

·                     A weak or unstable spine (caused by infections or tumors), fractures, or deformity (such as scoliosis)

Spinal Fusion Uses

Problems in your spinal column that can lead to a need for spinal fusion include a form of bone slippage called spondylolisthesis, debilitating forms of abnormal spinal curvature or deformity, and mechanical spinal instability caused by problems such as accidents or injuries. Surgeries that can produce enough spinal instability to require fusion as a follow-up procedure include complete or partial removal of a damaged spinal disc (discectomy) removal of all or part of the section of spinal bone that forms the back of the spinal canal (laminectomy); and widening of the gaps in your spinal column that allow nerves to pass through from your spinal cord (foraminotomy).

Spinal Fusion Benefits

The rigidity and stability provided by spinal fusion can prevent dangerous degrees of spinal motion, ease pain and other symptoms associated with unwanted or excessive spinal motion, and help prevent damage in the soft tissues situated near your spine. In the vast majority of cases, these benefits are either permanent or remain for extremely extended periods of time.

Success rates for fusion

·                     Spine fusion for conditions that arise from gross instability (e.g. isthmic or degenerative spondylolisthesis) tends to be more successful than surgery done for pain alone (e.g. degenerative disc disease).

·                     Individuals with only one badly degenerated disc (especially L5-S1) but an otherwise a normal spine tend to fare better than those undergoing multilevel fusions. Fusion surgery is generally considered for one or possibly two levels, and multilevel fusions should be avoided except in cases of severe deformity.

·                     Individuals who have significant disc degeneration usually find more pain relief from a fusion than those with only minor degeneration on the MRI scan (e.g. still have a tall disc).

The most important success factor in fusion surgery is confirming that a patient's back pain is truly caused by degenerative disc disease, rather than some other condition. This is done by a combination of a careful review of the patient's history, a physical exam, and diagnostic tests (such as x-ray and MRI), and/or possibly a discogram.

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