Adjustable, modular instrument and method for spinal manipulation
AssigneeGlobus Medical, Inc.
InventorCaelan Allen
Life of this patent
Estimating the term…
Abstract
A spinal manipulation instrument, system, and method may use a driving rod to move instrument arms toward or away from one another to compress or distract between selected vertebrae to which the arms are connected. Two arms may be coupled to the driving rod. A threaded collar may axially engage one of the arms, to translate that arm along the driving rod with respect to the other arm. The other arm may be at a fixed axial location or driven by another, oppositely-oriented thread. The arms may be highly adjustable to accommodate a wide range of anatomical variation between patients. Attachment members may be modular to interchangeably couple the arms across multiple platforms.
Claims12
A spinal manipulation instrument, comprising:
- a driving rod with a threaded portion defining an axis therethrough;
- a first arm rotatably coupled to the driving rod about the axis;
- a second arm rotatably coupled to the driving rod about the axis;
- a threaded collar coupled to the threaded portion of the driving rod in axial engagement with the second arm, such that the second arm translates along the driving rod with respect to the first arm in response to the rotation of the driving rod about the axis;
- and
- pedicle connectors configured for releasably coupling the first and second arm to respective vertebra;
- a releasable threaded connection between the threaded collar and the threaded portion of the driving rod, allowing for non-threaded axial re-positioning of the second arm along the driving rod when the threaded connection between the threaded collar and the threaded portion of the driving rod is released;
- wherein the releasable threaded connection comprises a cam lever mechanism.
A spinal manipulation instrument, comprising:
- a driving rod with a threaded portion defining an axis therethrough;
- a first arm rotatably coupled to the driving rod about the axis at a fixed axial location along the driving rod, such that the first arm remains at the fixed axial location during a rotation of the driving rod about the axis;
- a second arm with a threaded collar coupling the second arm to the threaded portion of the driving rod, such that the second arm translates along the driving rod with respect to the first arm in response to the rotation of the driving rod about the axis;
- a pivot mount between at least one of the first and second arms and the driving rod allowing one of the first and second arms to pivot with respect to the other;
- and
- pedicle connectors configured for releasably coupling each of the first and second arm to a respective bone fastener, the pedicle connectors including a connector tip on each of the first and second arms, a plurality of modular attachment members of different attachment member configurations for interchangeably coupling one of the connector tips to the respective bone fastener, and a swivel allowing rotation of each attachment member about an axis of the respective first or second arm, wherein the swivel is lockable at any of a plurality of different swivel angles within a 360-degree swivel range;
- a releasable threaded connection between the threaded collar and the threaded portion of the driving rod, allowing for non-threaded axial re-positioning of the second arm along the driving rod when the threaded connection between the threaded collar and the threaded portion of the driving rod is released;
- wherein the releasable threaded connection comprises a cam lever mechanism.
Dependencies are inferred from the claim text.