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US 12,594,099 B2Granted
Rod reduction instrument feedback system
AssigneeNuVasive, Inc.
InventorsChristopher Nelsen, Robert German, Michael Serra
Life of this patent
Estimating the term…
Abstract
Various implementations include rod reduction instruments, spinal fixation monitoring systems, and related methods. Certain implementations include a rod reduction instrument that is adapted for use with a spinal fixation system and includes a sensor configured to detect a load exerted by a rod reducer on a spinal rod, along with a reduction feedback system that provides an indicator of the load exerted by the rod reducer on the spinal rod.
Claims17
A spinal fixation system, comprising:
- a first bone anchor including a first pedicle screw and a receiver;
- a rod configured to be seated within the receiver of the first bone anchor;
- an instrument configured to couple to the first bone anchor, the instrument having a multi-section shaft;
- and
- a sensor mounted axially between distinct sections of the multi-section shaft and configured to determine data relating to at least one of:
- the first bone anchor, the rod or the instrument
- a reduction feedback system coupled with the sensor, the reduction feedback system configured to:
- receive load data indicating the load exerted by the rod reducer instrument on the portion of the spinal rod from a corresponding one of the sensors;
- provide an indicator of relative loading of the instrument as compared with at least one additional rod reducer instrument in the plurality of rod reduction instruments, and
- update the indicator of relative loading over time as load data for at least one of the first rod reducer or the additional rod reducers in the plurality of rod reduction instruments is updated,
- wherein the reduction feedback system is further configured to:
- compare the load data for each of the rod reducers instruments with a corresponding load threshold;
- and
- for each of the rod reducers instruments:
- provide an indicator that the load data satisfies or does not satisfy the load threshold for the rod reducer, the indicator being detectable by an operator of the plurality of rod reduction instruments,
- wherein the load threshold for the rod reducer is based at least in part on a model that correlates clinical data representing patient-specific bone quality with screw pullout.
13 more elements
A spinal fixation monitoring system for use in a spinal fixation procedure, the system comprising:
- a plurality of rod reduction instruments adapted for use with a spinal fixation system, each of the rod reduction instruments including:
- a rod reducer having a proximal end and a distal end, wherein the distal end of the rod reducer is configured to engage a spinal rod for seating the spinal rod into a corresponding pedicle screw receiver;
- and
- a sensor configured to detect a load exerted by the rod reducer on a portion of the spinal rod during seating of the spinal rod in the pedicle screw receiver;
- and
- a reduction feedback system coupled with the sensor of each of the rod reduction instruments, the reduction feedback system configured to:
- receive load data indicating the load exerted by each rod reducer on the portion of the spinal rod from a corresponding one of the sensors;
- provide an indicator of relative loading of a first rod reducer as compared with at least one additional rod reducer in the plurality of rod reduction instruments, and
- update the indicator of relative loading over time as load data for at least one of the first rod reducer or the additional rod reducers in the plurality of rod reduction instruments is updated,
- wherein the reduction feedback system is further configured to:
- compare the load data for each of the rod reducers with a corresponding load threshold;
- and
- for each of the rod reducers:
- provide an indicator that the load data satisfies or does not satisfy the load threshold for the rod reducer, the indicator being detectable by an operator of the plurality of rod reduction instruments,
- wherein the load threshold for the rod reducer is based at least in part on a model that correlates clinical data representing patient-specific bone quality with screw pullout.
12 more elements
A spinal fixation monitoring system for use in a spinal fixation procedure, the system comprising:
- a plurality of rod reduction instruments adapted for use with a spinal fixation system, each of the rod reduction instruments including:
- a rod reducer having a proximal end and a distal end, wherein the distal end of the rod reducer is configured to engage a spinal rod for seating the spinal rod into a corresponding pedicle screw receiver;
- and
- a sensor configured to detect a load exerted by the rod reducer on a portion of the spinal rod during seating of the spinal rod in the pedicle screw receiver;
- and
- a reduction feedback system coupled with the sensor of each of the rod reduction instruments, the reduction feedback system configured to:
- receive load data indicating the load exerted by each rod reducer on the portion of the spinal rod from a corresponding one of the sensors;
- provide an indicator of relative loading of a first rod reducer as compared with at least one additional rod reducer in the plurality of rod reduction instruments, and
- update the indicator of relative loading over time as load data for at least one of the first rod reducer or the additional rod reducers in the plurality of rod reduction instruments is updated,
- wherein the reduction feedback system is further configured to provide an indicator of reduction order for the plurality of rod reduction instruments based on the received load data.
7 more elements
Dependencies are inferred from the claim text.