Systems and methods for navigating an instrument through bone
First Claim
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1. A method for channeling a path into bone to a treatment location in a body of a patient, comprising:
- inserting a trocar into a region of bone near the treatment location, the trocar having a central channel and an opening at a distal tip of the trocar;
delivering a curved cannula through said central channel of said trocar to said opening,wherein the curved cannula comprises a deflectable distal tip with a preformed curve such that the deflectable distal tip straightens while being delivered through the trocar and regains its preformed curve upon exiting the trocar;
extending the curved cannula past the opening at the distal tip of the trocar to generate a curved path in the bone corresponding to the preformed curve of the deflectable distal tip;
inserting a channeling stylet into the curved cannula,wherein the channeling stylet is flexibly deformable to navigate the curved cannula yet rigid enough to retain a straight form upon exiting the deflectable distal tip of the curved cannula and wherein the channeling stylet is longer than the curved cannula;
creating a linear working channel starting at a distal end of the curved path formed by the curved cannula by extending the channeling stylet past the deflectable distal tip of the curved cannula;
removing the channeling stylet from the curved cannula; and
delivering a treatment device through a central passageway in said curved cannula to the treatment location within the linear working channel beyond the curved path.
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Abstract
System and methods are shown having a tube-within-tube assembly with a deployable curved deflectable tube or cannula that deploys from a straight cannula or trocar. The curved cannula has pre-curved distal end to create an angular range of 0° to 180° when fully deployed from the straight trocar. The curve is configured such that the flexible element carrying a treatment device can navigate through the angular range of deployment of the curved cannula. The curved cannula allows the flexible element to navigate through a curve within bone without veering off towards an unintended direction.
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Citations
31 Claims
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1. A method for channeling a path into bone to a treatment location in a body of a patient, comprising:
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inserting a trocar into a region of bone near the treatment location, the trocar having a central channel and an opening at a distal tip of the trocar; delivering a curved cannula through said central channel of said trocar to said opening, wherein the curved cannula comprises a deflectable distal tip with a preformed curve such that the deflectable distal tip straightens while being delivered through the trocar and regains its preformed curve upon exiting the trocar; extending the curved cannula past the opening at the distal tip of the trocar to generate a curved path in the bone corresponding to the preformed curve of the deflectable distal tip; inserting a channeling stylet into the curved cannula, wherein the channeling stylet is flexibly deformable to navigate the curved cannula yet rigid enough to retain a straight form upon exiting the deflectable distal tip of the curved cannula and wherein the channeling stylet is longer than the curved cannula; creating a linear working channel starting at a distal end of the curved path formed by the curved cannula by extending the channeling stylet past the deflectable distal tip of the curved cannula; removing the channeling stylet from the curved cannula; and delivering a treatment device through a central passageway in said curved cannula to the treatment location within the linear working channel beyond the curved path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for channeling a path into bone to a treatment location in a body of a patient, comprising:
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inserting a trocar through a cortical bone region and into a cancellous bone region of a vertebral bone near a treatment location, wherein the trocar has a central channel along its longitudinal axis and an axial opening at a distal tip of the trocar; delivering a curved cannula through said central channel of said trocar to said axial opening at the distal tip of the trocar, wherein the curved cannula comprises a deflectable distal tip with a preformed curve such that the deflectable distal tip straightens while being delivered through the central channel of the trocar and regains its preformed curve upon exiting the axial opening of the trocar; extending the curved cannula past the axial opening at the distal tip of the trocar to generate a curved path toward the treatment location corresponding to the preformed curve of the deflectable distal tip of the curved cannula, wherein the curved cannula is extended through at least a portion of the cancellous bone region to a location near the treatment location; creating a linear working channel starting at a distal end of the curved path formed by the curved cannula by inserting a channeling stylet within the curved cannula and extending the channeling stylet past the deflectable distal tip of the curved cannula, wherein the channeling stylet is flexibly deformable to navigate the curved cannula yet rigid enough to retain a straight form upon exiting the deflectable distal tip of the curved cannula and wherein the channeling stylet is longer than the curved cannula; removing the channeling stylet from the curved cannula; delivering an energy delivery probe through a central passageway in said curved cannula and within the linear working channel beyond the curved path to the treatment location; and activating the energy delivery probe at the treatment location to deliver energy to the treatment location. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification