Surgical device

摘要

An exemplary nucleus removal device may be used to remove a portion of nucleus pulposus from an intervertebral disc. A nucleus removal device may include a cannula, an access tool, a maceration tool, and an evacuation tool. The access cannula is inserted into an intervertebral body laterally, creating a fissure in the annular fibrosis. The access tool 304 is slid through the access cannula and the fissure in annular fibrosis, such that a portion of access tool extends into the nucleus pulposus. The maceration tool is extended from the access tool into the nucleus pulposus, in a direction orthogonal to the axial extension of access tool, and macerates the nucleus pulposus. To assist in maceration, a stream of liquid may also be introduced into the vertebral body through the access tool before, during, or after maceration. Macerated material and liquid is removed from the intervertebral disc by the evacuation tool.

主权项

1. An apparatus comprising:
an axially extending tubular access tool, comprising:
a proximal first end having a first orifice along the axial extension of the tool,a distal second end, forming a point along the axial extension of the tool,a second orifice, formed between the first end and the second end and located on an axis orthogonal to the axial extension of the cannula,a first tubular channel extending from the first orifice to the second orifice, adapted to channel a liquid from the first orifice to the second orifice,a second tubular channel extending from the first orifice to the second orifice and in cooperative arrangement with a maceration tool,a third tubular channel extending from the first orifice to the second orifice and in cooperative arrangement with an evacuation tool; a maceration tool within the second channel, comprising a maceration element and a first axially extending shaft, wherein radial rotation of the first shaft results in rotation of the maceration element; an evacuation tool within the third channel, comprising one or more evacuation elements and a second axially extending shaft, wherein radial rotation of the second shaft results in rotation of the evacuation element; wherein movement of the first shaft in a proximal to distal direction results in movement of the maceration element out of the second orifice in a direction generally orthogonal to the longitudinal extension of the tubular access tool; wherein the maceration element is adapted to macerate tissue when rotated; and wherein the evacuation elements are adapted to move material through the third channel when rotated.