Systems for treating a vertebral body

摘要

Methods and devices that displace bone or other hard tissue to create a cavity in the tissue. Where such methods and devices rely on a driving mechanism for providing moving of the device to form a profile that improves displacement of the tissue. These methods and devices also allow for creating a path or cavity in bone for insertion of bone cement or other filler to treat a fracture or other condition in the bone. The features relating to the methods and devices described herein can be applied in any region of bone or hard tissue where the tissue or bone is displaced to define a bore or cavity instead of being extracted from the body such as during a drilling or ablation procedure.

主权项

1. A method of treating a vertebral body, comprising:
providing an elongate tool having a sharp tip configured for penetration into vertebral tissue, the tool having an axis extending from a proximal end to a working end thereof, where the working end comprises at least a first sleeve concentrically located within a second sleeve, where the first sleeve has a weakened section on a single side comprising a first series of slots or notches, and the second sleeve has a weakened section on a single side comprising a second series of slots or notches, where the first and second series of slots or notches limit deflection of the working end to a first curved configuration in a single plane and where the first and second series of slots or notches are radially offset from each other, where a first conductive portion of the first sleeve is electrically coupled to a first pole of a power supply; advancing the working end through vertebral tissue; causing the working end to move from a linear configuration to a curved configuration by translating the first sleeve relative to the second sleeve in an axial direction; and applying energy between the first conductive portion and a return electrode electrically coupled to a second pole of the energy supply to ablate or coagulate a region within the vertebral body.