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US 12,678,204 B2Granted
Rod rocker reducer instruments and methods
AssigneeMedos International Sarl
InventorsBrandon MacAleese, Eric Biester, Suken Shah, Firoz Miyanji
Life of this patent
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Abstract
Example rocker reducer instruments securely engage a receiver that is implanted in a vertebra of the spine and move a spinal fixation element, such as a rod, into a channel formed in the receiver. Example instruments pivot around their contact point with the receiver and a cross-pin or foot feature on the instrument makes contact with the spinal rod and applies a downward force to reduce the rod into the receiver. Further, example instruments can contain a stopping mechanism to limit the amount of compressing force applied to the receiver while maintaining the instrument in a rigid, closed position.
Claims24
A surgical instrument for inserting a rod into a receiver, comprising:
- a first jaw having a first distal end with a first distal protrusion extending therefrom;
- a second opposing jaw having a second distal end with a second distal protrusion extending therefrom;
- an adjustment mechanism coupled with a proximal end of the first jaw and a proximal end of the second jaw and configured to control the relative positions of the first and second jaws;
- and
- a stop arrangement for defining a closed position of the first jaw and the second jaw, such that, in the closed position, the distal ends of the first and second jaws are spaced apart such that the first and second jaws do not exert a clamping force on the receiver or are prevented from exerting beyond a non-deflecting clamping force on the receiver, wherein the stop arrangement includes a rigid body disposed proximal to the first distal protrusion extending from the first jaw towards the second jaw,
- wherein, in the closed position, the first distal protrusion extends towards the second jaw, the second distal protrusion extends towards the first jaw, and the rigid body extends into an opening of the second jaw,
- wherein the first jaw and the second jaw are connected by the adjustment mechanism such that the first and second jaws are configured to move between an open position and the closed position, wherein, in the open position, the first and second distal protrusions are maximally spaced apart and, wherein, in the closed position, the first and second distal protrusions are minimally spaced apart, and
- wherein the first and second distal protrusions are arranged to contact a spinal implant on opposing sides when the instrument is in the closed position.
5 more elements
A surgical instrument for inserting a rod into a receiver, comprising:
- a first jaw having a first distal end with a first distal protrusion extending therefrom;
- a second opposing jaw having a second distal end with a second distal protrusion extending therefrom;
- an adjustment mechanism coupled with a proximal end of the first jaw and a proximal end of the second jaw and configured to control the relative positions of the first and second jaws;
- a first handle and a second handle each extending from the adjustment mechanism and configured to control movement of the first and second jaws via the adjustment mechanism such that relative movement between the first jaw and the second jaw corresponds to relative movement between the first handle and the second handle;
- a stop arrangement for defining a closed position of the first jaw and the second jaw, such that, in the closed position, the distal ends of the first and second jaws are spaced apart such that the first and second jaws do not exert a clamping force on the receiver or are prevented from exerting beyond a non-deflecting clamping force on the receiver;
- and
- a locking mechanism configured to selectively lock the first and second jaws in the closed position, wherein the locking mechanism is configured to remain unlocked when the first and second jaws are in the closed position, until the first and second handles are flexed towards each other in response to a squeezing pressure applied to the first and second handles, the flexing locking the locking mechanism and maintaining the handles in a flexed position;
- wherein, in the closed position, the first distal protrusion extends towards the second jaw and the second distal protrusion extends towards the first jaw,
- wherein the first jaw comprises a rigid body disposed proximal to the first distal protrusion, the rigid body extending from the first jaw towards the second jaw in the closed position,
- wherein the first jaw and the second jaw are connected by the adjustment mechanism such that the first and second jaws are configured to move between an open position and the closed position, wherein, in the open position, the first and second distal protrusions are maximally spaced apart and, wherein, in the closed position, the first and second distal protrusions are minimally spaced apart, and
- wherein the first and second distal protrusions are arranged to contact a spinal implant on opposing sides when the instrument is in the closed position.
8 more elements
Dependencies are inferred from the claim text.