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Balloon With Shape Control For Spinal Procedures

Inactive Publication Date: 2009-04-02
DEPUY SYNTHES PROD INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0016]In one example thereof, a single spreader block and a single independent balloon are initially placed within the disc space. The spreader block is rotated to loosen the annulus fibrosus and regain some of the collapsed disc height. The balloon is then inflated, thereby filling the cleared disc cavity defined by the spreader block and the natural annulus and further distracting the disc to regain even more disc height. The spreader block both limits radial expansion of the balloon and thereby encourages vertical balloon expansion.
[0023]b) moving the sleeve relative to the insert to expose the insert, and thereby allowing the insert to curve, contact, connect and / or lock upon itself,

Problems solved by technology

Preferably, fluid communication to the balloons is not achieved through the block.

Method used

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  • Balloon With Shape Control For Spinal Procedures
  • Balloon With Shape Control For Spinal Procedures
  • Balloon With Shape Control For Spinal Procedures

Examples

Experimental program
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Effect test

Embodiment Construction

[0042]Generally, in independent (or “unattached”) embodiments, there is generally provided:[0043]a) a spreader insertion instrument comprising a proximal handle and a distal spreader block having a distal end portion, a height defined by first and second surfaces, and a width defined by third and fourth surfaces, and[0044]b) an inflatable device comprising i) a proximal cannula having a proximal end and a distal end, and ii) a distal balloon having a proximal opening attached to the distal end of the cannula.

[0045]A first function of the spreader insertion instrument is to provide an initial distraction of the disc space. Typically, the width of the spreader block is greater than its height (i.e., the distance between its third and fourth surfaces exceeds the distance between its first and second surfaces). Accordingly, when the spreader block is inserted into the disc space (so that its first and second surfaces contact the endplates) and then rotated 90 degrees (so that its third ...

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PUM

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Abstract

In intervertebral operative spinal procedures, using separate or pre-attached spreader blocks to control the directional growth of a distracting balloon.

Description

BACKGROUND OF THE INVENTION[0001]The natural intervertebral disc contains a jelly-like nucleus pulposus surrounded by a fibrous annulus fibrosus. Under an axial load, the nucleus pulposus compresses and radially transfers that load to the annulus fibrosus. The laminated nature of the annulus fibrosus provides it with a high tensile strength and so allows it to expand radially in response to this transferred load.[0002]In a healthy intervertebral disc, cells within the nucleus pulposus produce an extracellular matrix (ECM) containing a high percentage of proteoglycans. These proteoglycans contain sulfated functional groups that retain water, thereby providing the nucleus pulposus with its cushioning qualities. These nucleus pulposus cells may also secrete small amounts of cytokines as well as matrix metalloproteinases (MMPs). The cytokines help regulate the metabolism of the nucleus pulposus cells.[0003]In some instances of disc degeneration disease (DDD), gradual degeneration of the...

Claims

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Application Information

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IPC IPC(8): A61M29/00
CPCA61M25/1002A61M2025/1063A61M29/02A61B17/8805A61F2/442A61B17/025A61B2017/00557A61B2017/0225A61B2017/0256
Inventor O'NEIL, MICHAEL J.SLIVKA, MICHAEL A.UPAL, ANWARHAWKINS, JOHN RILEYFISHER, MICHAEL A.
Owner DEPUY SYNTHES PROD INC
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