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SURGICAL ACCESS SYSTEM AND RELATED METHODS

  • US 20120238822A1
  • Filed: 06/01/2012
  • Published: 09/20/2012
  • Est. Priority Date: 10/08/2002
  • Status: Active Grant
First Claim
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1. A system for accessing a spinal disc of a lumbar spine through an operative corridor, comprising:

  • an initial dilating cannula configured to create a tissue distraction corridor to a lumbar spine, wherein said initial dilating cannula is deliverable to a spinal disc along a lateral, trans-psoas path to the lumbar spine, the distal tip region of the initial dilating cannula including a stimulation electrode exposed along a tapered outer surface that is angled relative to a longitudinal axis of said initial dilating cannula such that the stimulation electrode is configured to deliver electrical stimulation away from the distal tip region for nerve monitoring when the initial dilating cannula is positioned in the lateral, trans-psoas path,a secondary distraction assembly comprising a plurality of dilators of sequentially larger diameter deliverable to the spinal disc along the lateral, trans-psoas path; and

    a retraction assembly comprising a blade holder apparatus and a plurality of retractor blades releasably attachable to said blade holder apparatus, wherein said retraction assembly is configured to maintain an operative corridor along the lateral, trans-psoas path to the lumbar spine that is enlarged from the tissue distraction corridor along the lateral, trans-psoas path to the lumbar spine, wherein the retraction assembly further comprises a fixation element that is releasably attachable to a first retractor blade of the plurality of retractor blades such that a distal portion of said fixation element extends distally of a distal end of the said first retractor blade and is configured to penetrate into the lumbar spine for affixing the first retractor blade to the lumbar spine, said fixation element including a proximal portion having a width that is greater than a maximum width of said distal portion of said fixation element, wherein a second retractor blade of the plurality of retractor blades is movable away from the first retractor blade for establishing said operative corridor to the lumbar spine between said first and second retractor blades,wherein the operative corridor is dimensioned so as to pass an implant through the operative corridor along the lateral, trans-psoas path to the lumbar spine.

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