Channeling paths into 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 an introducer into a region of the bone near the treatment location, the introducer having a central channel and an opening at a distal tip of the introducer;
delivering a curved cannula through said central channel of said introducer to said opening,wherein a proximal portion of the curved cannula comprises a locking nut to control advancement of the curved cannula with respect to the introducer,wherein the curved cannula comprises a deflectable distal tip having a preformed curve such that the deflectable distal tip straightens while being delivered through the introducer and transitions to a curved configuration upon exiting the introducer,wherein the deflectable distal tip of the curved cannula is configured to arc to an angle of between 5 degrees and 90 degrees;
moving the locking nut to a position such that the locking nut is in contact with a proximal end of the curved cannula, thereby allowing the deflectable distal tip of the curved cannula to be advanced past the opening at the distal tip of the introducer and to transition to the curved configuration;
extending the curved cannula past the opening at the distal tip of the introducer 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;
creating a linear channel starting at a distal end of the curved path formed by the curved cannula by extending a distal end of the channeling stylet out of the deflectable distal tip of the curved cannula;
removing the channeling stylet from the curved cannula; and
delivering a treatment device through said curved cannula to the treatment location through the linear channel.
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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 a 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
20 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 an introducer into a region of the bone near the treatment location, the introducer having a central channel and an opening at a distal tip of the introducer; delivering a curved cannula through said central channel of said introducer to said opening, wherein a proximal portion of the curved cannula comprises a locking nut to control advancement of the curved cannula with respect to the introducer, wherein the curved cannula comprises a deflectable distal tip having a preformed curve such that the deflectable distal tip straightens while being delivered through the introducer and transitions to a curved configuration upon exiting the introducer, wherein the deflectable distal tip of the curved cannula is configured to arc to an angle of between 5 degrees and 90 degrees; moving the locking nut to a position such that the locking nut is in contact with a proximal end of the curved cannula, thereby allowing the deflectable distal tip of the curved cannula to be advanced past the opening at the distal tip of the introducer and to transition to the curved configuration; extending the curved cannula past the opening at the distal tip of the introducer 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; creating a linear channel starting at a distal end of the curved path formed by the curved cannula by extending a distal end of the channeling stylet out of the deflectable distal tip of the curved cannula; removing the channeling stylet from the curved cannula; and delivering a treatment device through said curved cannula to the treatment location through the linear channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for channeling a path into vertebral bone to a treatment location in a body of a patient, comprising:
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providing an energy delivery system, said energy delivery system comprising an introducer, a curved cannula, a channeling stylet, and an energy delivery probe; inserting the introducer through a pedicle and into a cancellous bone region of the vertebral bone near the treatment location, wherein the introducer has a central channel along its longitudinal axis and an axial opening at a distal tip of the introducer; delivering the curved cannula through said central channel of said introducer to said axial opening at the distal tip of the introducer, wherein a proximal end of the curved cannula comprises a locking nut to control advancement of the curved cannula with respect to the introducer, wherein the curved cannula comprises a deflectable distal tip having a preformed curved configuration such that the deflectable distal tip straightens while being delivered through the central channel of the introducer and curves again upon exiting the axial opening of the introducer; extending the curved cannula past the axial opening at the distal tip of the introducer to generate a curved path toward the treatment location corresponding to the preformed curved configuration 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, wherein the deflectable distal tip of the curved cannula is configured to arc to an angle between 5 degrees and 110 degrees; creating a linear channel starting at a distal end of the curved path formed by the curved cannula by inserting the channeling stylet within the curved cannula and extending a distal end of the channeling stylet out of 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; removing the channeling stylet from the curved cannula; delivering the energy delivery probe through a central passageway in said curved cannula to the treatment location through the linear channel; and activating the energy delivery probe at the treatment location to deliver energy to the treatment location. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification