Apparatus and method for bone positioning
AssigneeDePuy Orthopaedics, Inc.
InventorsScott C. Brown, Hal S. Crane
Life of this patent
Estimating the term…
Abstract
An apparatus for use in an arrangement for measuring the relative position of two bones during surgery includes a clamp and a measurement arm. The clamp is adapted to engage and secure to an anchor in a fixed vertical position, the anchor being secured to a first bone location. The measurement arm comprises an elongate portion and a locator portion that extends angularly from the elongate portion. The measurement arm is slidably supported on the clamp. The measurement arm is further rotatably supported on the clamp at a position in which an axis of rotation of the measurement arm is spaced apart from a longitudinal axis of the anchor.
Claims28
An apparatus for use in an arrangement for measuring the relative position of two bones during surgery, comprising:
- a spring biased clamp having first and second opposing clamping surfaces, the first and second opposing clamping surfaces adapted to engage and secure the clamp to an anchor in a fixed vertical position, the anchor secured to a first bone location;
- a measurement arm comprising an elongate portion and a locator portion extending angularly from the elongate portion, the measurement arm slidably supported on the spring biased clamp,
- wherein a vertical shaft is interposed between the measurement arm and the spring biased clamp.
An apparatus for use in an arrangement for measuring the relative positioning of two bones during surgery, comprising:
- a clamp adapted to engage and secure to an anchor in a fixed vertical position, the anchor secured to a first bone location;
- a measurement arm comprising an elongate portion and a locator portion extending angularly from the elongate portion, the measurement arm slidably supported on the clamp, the measurement arm further rotatably supported on the clamp via a spring biased clamping element,
- wherein the spring biased clamping element comprises a stationary shaft, a movable shaft, and an arm engagement member, the stationary shaft including an end support surface, the movable shaft including a retention surface and having a rest position and an actuated position, the movable shaft urging the retention surface toward the end support surface in the rest position, the arm engagement member configured to be secured in a fixed rotational position when said movable shaft is in the rest position.
An apparatus for use in an arrangement for measuring the relative positioning of two bones during surgery, comprising:
- a clamp adapted to engage and secure to an anchor in a fixed vertical position, the anchor secured to a first bone location;
- a measurement arm comprising an elongate portion and a locator portion extending angularly from the elongate portion, the measurement arm slidably supported on the clamp, the measurement arm further rotatably supported on the clamp via a spring biased clamping element;
- and
- a vertical shaft disposed between the clamp and the measurement arm.
An apparatus for use in an arrangement for measuring the relative distance between two bones during surgery, comprising:
- a clamp adapted to engage and secure to an anchor in a fixed vertical position, the anchor secured to a first bone location;
- and
- a measurement arm comprising an elongate portion and a locator portion extending angularly from the elongate portion, the measurement arm slidably supported on the clamp, the measurement arm further rotatably supported on the clamp at a position in which an axis of rotation of the measurement arm is spaced apart from a longitudinal axis of the anchor,
- wherein the clamp is adapted to be rotatable about the longitudinal axis of the anchor.
An apparatus for use in an arrangement for measuring the relative distance between two bones during surgery, comprising:
- an anchor configured to be affixed to a first bone;
- a clamp adapted to engage and secure to the anchor in a fixed vertical position, the anchor secured to a first bone location;
- and
- a measurement arm comprising an elongate portion and a locator portion extending angularly from the elongate portion, the measurement arm slidably supported on the clamp, the measurement arm further rotatably supported on the clamp at a position in which an axis of rotation of the measurement arm is spaced apart from a longitudinal axis of the anchor,
- wherein the clamp is adapted to be rotatable about the longitudinal axis of the anchor.
Dependencies are inferred from the claim text.