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Integrated cement delivery system for bone augmentation procedures and methods

  • US 8,409,211 B2
  • Filed: 10/07/2008
  • Issued: 04/02/2013
  • Est. Priority Date: 04/07/2006
  • Status: Active Grant
First Claim
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1. A bone cement delivery system for vertebroplasty comprising a rigid cannula having:

  • a tubular inner wall defining and surrounding a central conduit to deliver bone cement into a vertebra under pressure, the inner wall defining a distal outlet port of the central conduit at a distal end of the cannula;

    a tubular outer wall extending around the inner wall and spaced apart therefrom to define a peripheral conduit around the central conduit for aspirating bone fluids, the outer wall defining a plurality of fenestrations defined at the distal end, the outer wall defining a distal inlet port of the peripheral conduit at the distal end of the cannula;

    the outer wall having an outer diameter not exceeding acceptable parameters for vertebroplasty;

    a proximal end of the cannula including a proximal inlet port in communication with the central conduit and a proximal outlet port in communication with the peripheral conduit;

    a vacuum pump communicating with the proximal outlet port of the peripheral conduit to create a pressure gradient between the central conduit and the peripheral conduit to provide a hydraulic force guiding the displacement of bone fluid and the flow of cement;

    a source of bone cement delivering bone cement to the proximal inlet port; and

    a helical thread defining a screw delivery mechanism in the central conduit extending from the proximal inlet port to the distal outlet port.

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