Integrated cement delivery system for bone augmentation procedures and methods
First Claim
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.
3 Assignments
0 Petitions
Accused Products
Abstract
A cement delivery system for vertebroplasty including a rigid cannula having a tubular inner wall defining a central conduit to deliver bone cement and a tubular outer wall extending around the inner wall and spaced apart therefrom to define a peripheral conduit for aspirating bone fluids. Aspirating means communicate with a 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. Also, a bone cement delivery system including a rigid cannula having a tubular inner wall defining a central conduit, a tubular outer wall extending around the inner wall and spaced apart therefrom to define a peripheral conduit, and a tubular middle wall extending between the inner and peripheral walls and spaced apart therefrom to define a middle conduit around the central conduit.
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Citations
9 Claims
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1. A bone cement delivery system for vertebroplasty comprising a rigid cannula having:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification