ABOUT MAS PLIF ® A Maximum Access Approach to Lower Back Surgery Completed procedure with the MaXcess® MAS PLIF retractor in place. The NuVasive® MAS PLIF procedure is a minimally disruptive approach to traditional back surgery. A traditional PLIF procedure, or posterior lumbar interbody fusion, is performed by making a midline incision in the patient’s back and retracting the attached muscles laterally (to the side) beyond the facet joint to allow sufficient access to the spine. This “open” approach often results in postoperative approach-related muscle pain and denervation (loss of nerve supply). How MAS PLIF Differs from a Traditional Approach The distinct difference between a traditional “open” PLIF and a minimally disruptive Maximum Access Surgery (MAS) PLIF is the medialized surgical approach and smaller incision. By using a medialized (closer to the spinous process) screw entry point, the MAS PLIF procedure is designed to eliminate the need to retract muscle laterally (wide) past the facet joint, therefore requiring a smaller incision than an open PLIF. By minimizing the amount of muscle disruption, this procedure is intended to reduce postoperative approach-related muscle pain and enable a faster recovery for the patient. More on Lumbar Interbody Fusion Both MAS PLIF and traditional PLIF surgeries attempt to reduce instability in the lower back. Instability can result from degenerated discs and/or facet joints that cause unnatural motion and pain, as well as loss of height of the disc space between the vertebrae, which can pinch the nerves exiting the spinal canal (foraminal stenosis). Additional causes are slippage of one vertebra over another (listhesis) and/or change in the normal curvature of the spine (scoliosis, hyper- or hypo-lordosis). Stabilization occurs through fusion, which is accomplished by creating a bridge of bone between two vertebral bodies to reduce their motion. In preparation for spinal fusion, the intervertebral disc is removed and a spacer device is placed between the vertebrae to restore spinal alignment and disc height. Bone graft (e.g., autograft) is inserted to promote new bone growth. The fusion then occurs between the endplates of the vertebrae. MAS PLIF Potential Patient Benefits ® Reduced blood loss and minimal scarring The medialized surgical approach allows for a smaller incision and typically causes less muscle disruption than a traditional “open” PLIF procedure. Reduced hospital stay Most MAS PLIF patients are discharged from the hospital one to two days after surgery. Reduced postoperative pain The MAS PLIF procedure was created to avoid excessive lateral dissection/retraction that can cause trauma to and denervation of back muscles. Faster return to normal activity Because this procedure was designed to be less disruptive than conventional posterior surgery, most patients are able to stand up and walk the evening after surgery. Potential risks following the MAS PLIF procedure may include: early or late infection, which may result in the need for additional surgeries; damage to the blood vessels, spinal cord, or peripheral nerves; pulmonary emboli (blood clots in the lungs); loss of sensory and/or motor (muscle) function; impotence; permanent pain and/or deformity. Rarely, some complications may be fatal. MAS PLIF Applications The MAS PLIF procedure may be a good option for patients suffering from: > > > > Neurologic symptoms (e.g., leg pain, numbness, bladder dysfunction) Degenerative disc disease Recurrent degenerative disc herniation Advanced degenerative disc disease with resultant spondylolisthesis There are several nonsurgical treatments available to help relieve lower back pain. These include applying heat, taking medication to reduce pain and swelling, exercising, acupuncture, physical therapy, rest, and corticosteroids injections. Once all nonsurgical treatments have been exhausted, surgery may be the next step. About NuVasive ® NuVasive is an innovative medical device company focused on developing minimally disruptive surgical products and procedures for the spine. Our mission is to improve the lives of patients who suffer from debilitating back, neck, or leg pain by creating cutting-edge products and procedures that revolutionize spine surgery through focusing on Speed of Innovation®, Absolute Responsiveness®, and Superior Clinical Results. As with any spine surgery, there are potential benefits and possible risks associated with the MAS PLIF procedure. Individual results will vary. It is important to discuss the possible risks and potential benefits of MAS PLIF with a physician prior to receiving treatment and that you rely on your physician’s judgment. Only your physician can determine whether you are a suitable candidate for this procedure. NuVasive, Inc., 7475 Lusk Boulevard, San Diego, CA 92121 / Tel 800.475.9131 / Fax 800.475.9134 / www.nuvasive.com ©2014. NuVasive, Inc. All rights reserved. , NuVasive, Speed of Innovation, Absolute Responsiveness, MAS, and MaXcess are registered trademarks of NuVasive, Inc. 14-NUVA-1344
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