Apparatus and methods for delivering compounds into vertebrae for vertebroplasty
First Claim
1. An apparatus for delivering bone cement into a vertebra, comprising:
- a cannula comprising a proximal end, a distal end having a size and shape for insertion into a vertebra, and a lumen extending between the proximal end and an opening in the distal end; and
a delivery device comprising a barrel and a piston, the barrel defining a cavity for receiving a flowable compound therein, the barrel having a distal end comprising an outlet communicating with the cavity, the distal end of the barrel being pivotally connected to the proximal end of the cannula via only one pivot joint such that the outlet communicates with the lumen of the cannula, the piston being slidable within the cavity of the barrel for delivering the flowable compound therein through the outlet.
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Accused Products
Abstract
An apparatus for delivering bone cement into a vertebra includes a cannula and a syringe pivotally coupled to the cannula. Preferably, the syringe is pivotally coupled to the cannula by a pivot fitting that may be detachable from one or both of the cannula and the syringe. The syringe includes a piston slidable in a barrel for advancing the bone cement through an outlet communicating with the cannula. A shaft and cable arrangement or a fluid-driven system may be used to advance the piston within the syringe. The cannula is inserted into a vertebra, and is connected to the syringe. The syringe is pivoted to a desired position, and bone cement is delivered from the syringe through the cannula and into the vertebra.
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Citations
36 Claims
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1. An apparatus for delivering bone cement into a vertebra, comprising:
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a cannula comprising a proximal end, a distal end having a size and shape for insertion into a vertebra, and a lumen extending between the proximal end and an opening in the distal end; and a delivery device comprising a barrel and a piston, the barrel defining a cavity for receiving a flowable compound therein, the barrel having a distal end comprising an outlet communicating with the cavity, the distal end of the barrel being pivotally connected to the proximal end of the cannula via only one pivot joint such that the outlet communicates with the lumen of the cannula, the piston being slidable within the cavity of the barrel for delivering the flowable compound therein through the outlet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for delivering bone cement into a vertebra, comprising:
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a cannula comprising a proximal end, a distal end having a size and shape for insertion into a vertebra, and a lumen extending between the proximal end and an opening in the distal end; a delivery device comprising a barrel defining a cavity for receiving a flowable compound therein, a distal end comprising an outlet communicating with the cavity, a piston slidable within the cavity of the barrel for delivering the flowable compound therein through the outlet, and a shaft coupled to the piston and having a thread pattern thereon for mating with the threaded opening such that rotation of the shaft advances the piston axially within the cavity, the distal end being pivotally connected to the proximal end of the cannula such that the outlet communicates with the lumen of the cannula; a cable coupled to the shaft; and an actuator coupled to the cable, wherein rotation of the actuator causes rotation of the shaft to advance the piston within the cavity. - View Dependent Claims (10, 11)
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12. An apparatus for delivering bone cement into a vertebra, comprising:
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a cannula comprising a proximal end, a distal end having a size and shape for insertion into a vertebra, and a lumen extending between the proximal end and an opening in the distal end; a delivery device comprising a barrel defining a cavity for receiving a flowable compound therein, a distal end comprising an outlet communicating with the cavity, and a piston slidable within the cavity of the barrel for delivering the flowable compound therein through the outlet, wherein the piston divides the cavity into a distal region for receiving a flowable compound therein and a proximal region, the distal end being pivotally connected to the proximal end of the cannula such that the outlet communicates with the lumen of the cannula; a source of fluid communicating with the proximal region of the cavity via tubing for delivering fluid into the proximal region to advance the piston distally within the barrel. - View Dependent Claims (13, 14, 15, 16)
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17. A method for delivering bone cement into a vertebra of a patient, the method comprising:
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inserting a distal end of a cannula into the vertebra; connecting a proximal end of the cannula to a delivery device comprising bone cement therein using a pivot fitting, the delivery device comprising a cable coupled to a piston within the delivery device; pivoting the delivery device relative to the cannula to a desired position; rotating the cable, thereby causing the piston to advance within the delivery device to deliver the bone cement from the delivery device through the cannula and into the vertebra; and removing the cannula from the vertebra. - View Dependent Claims (18)
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19. A method for delivering a flowable compound into a hard tissue structure of a patient, the method comprising:
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inserting a distal end of a cannula into the tissue structure to be treated; pivotally connecting a proximal end of the cannula to a barrel via only one pivot joint, the barrel containing a flowable compound therein; pivoting the barrel relative to the cannula to a desired position; delivering the compound from the barrel through the cannula and into the tissue structure; and removing the cannula from the tissue structure. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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27. A method for delivering a flowable compound into a hard tissue structure of a patient, the method comprising:
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inserting a distal end of a cannula into the tissue structure to be treated; pivotally connecting a proximal end of the cannula to a delivery device comprising a flowable compound therein; pivoting the delivery device relative to the cannula to a desired position; delivering the compound from the delivery device through the cannula and into the tissue structure by rotating a cable coupled to a piston slidably disposed within the delivery device to advance the piston within the delivery device; and removing the cannula from the tissue structure. - View Dependent Claims (28, 29, 30, 31, 32)
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33. A method for delivering a flowable compound into a hard tissue structure of a patient, the method comprising:
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inserting a distal end of a cannula into the tissue structure to be treated; pivotally connecting a proximal end of the cannula to a delivery device comprising a flowable compound therein, wherein a piston is slidable within the delivery device, thereby defining a proximal chamber within the delivery device; pivoting the delivery device relative to the cannula to a desired position; delivering the compound from the delivery device through the cannula and into the tissue structure by delivering a fluid into the proximal chamber to advance the piston within the delivery device; and removing the cannula from the tissue structure. - View Dependent Claims (34, 35, 36)
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Specification