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INTEGRATED CEMENT DELIVERY SYSTEM FOR BONE AUGMENTATION PROCEDURES AND METHODS

  • US 20130190680A1
  • Filed: 03/08/2013
  • Published: 07/25/2013
  • 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 cannula having;

    a rigid metal 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 rigid metal 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 having an outer diameter not exceeding acceptable parameters for vertebroplasty, the outer wall defining a distal inlet port in the form of fenestrations defined in the tubular outer wall in communication with the peripheral conduit at the distal end of the cannula wherein the outlet port of the central conduit and the inlet port of the peripheral conduit are spaced apart linearly, the fenestrations being unobstructed and directly exposed to an environment of the delivery system;

    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; and

    a vacuum pump communicating with the proximal outlet port of the peripheral conduit and applying a pressure in the range of 10 to 100 KPa to create a pressure gradient between the central conduit and the peripheral conduit to produce a difference in flow rate between the conduits guiding the displacement of bone fluid and the flow of cement.

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