Direct vertebral rotation tool and method of using same
AssigneeBlackstone Medical, Inc.
InventorDaniel Greenberg
Life of this patent
Estimating the term…
Abstract
A head holder for holding and tensioning the head of a bone screw, particularly a pedicle screw, is provided. Also provided is a ratcheting connector for connecting to the head holders while permitting rotational movement of the head holder when engaged with the ratcheting connector. Also provided is a flex arm connector for connecting multiple ratcheting connectors across multiple vertebral bodies. A tool set for managing and/or correcting spinal deformities, such as scoliosis, including at least one or more head holders and one or more ratcheting connectors is provided.
Claims20
A vertebral rotation tool comprising:
- a head holder comprising:
- a handle portion having generally tubular shape, a distal end and a proximal end;
- an inner sheath having a tubular proximal end and a distal end having two U-shaped cutouts, two arc-shaped head clamp portions adapted to receive the head of a pedicle screw;
- an outer sheath having a distal end and a proximal ring section, the proximal ring section including a locking mechanism that permits the outer sheath to move between and to reside in locked and unlocked positions, wherein the proximal end of the inner sheath can be attached to the handle portion, the outer sheath can surround the inner sheath;
- and
- a spring adapted to surround the inner sheath and be positioned between a distal edge of the handle portion and a proximal edge of the outer sheath.
A vertebral rotation tool comprising:
- a head holder comprising:
- a handle portion having generally tubular shape, a distal end and a proximal end;
- an inner sheath having a tubular proximal end and a distal end having two U-shaped cutouts, two arc-shaped head clamp portions adapted to receive the head of a pedicle screw;
- an outer sheath having a distal end and a proximal ring section, the proximal ring section including a locking mechanism that permits the outer sheath to move between and to reside in locked and unlocked positions, wherein the proximal end of the inner sheath can be attached to the handle portion, the outer sheath can surround the inner sheath;
- wherein the distal portion of the inner sheath is adapted to be releasably connected to the head of a pedicle screw by applying an axial force along a longitudinal axis of the head holder;
- and
- a ratcheting connector comprising:
- a first arm comprising a first inner section and a first outer section, the first outer section comprising a first adjustable circular sleeve;
- a first rotatable bearing adapted to be rotatably mounted within the first adjustable sleeve;
- a first mechanism adapted to lock the first adjustable circular sleeve around the first rotatable bearing;
- a second arm comprising a second inner section and a second outer section, the second outer section comprising a second adjustable circular sleeve and a receptacle having an opening;
- a second rotatable bearing adapted to be rotatably mounted within the second adjustable sleeve;
- a second mechanism adapted to lock the second adjustable circular sleeve around the second rotatable bearing;
- wherein the first and second inner sections are adapted to be slidably connected to each other to permit adjustment of the distance between the first and second circular openings;
- and
- wherein the ratcheting connector further comprises a receptacle placed on an upper surface of the ratcheting connector that can receive and releasably lock an installation tool.
Dependencies are inferred from the claim text.