Spinal distraction tool for load and position measurement
First Claim
1. A method of distracting a spinal region comprising the steps of:
- inserting a sensored head of a spinal instrument into a spinal region;
electronically measuring at least one of the orientation, rotation, angle, or position of the sensor head with respect to a reference position not on the spinal instrument;
positioning the sensored head until the position of a load magnitude on the sensored head as electronically measured by the sensored head is within a predetermined positional range; and
distracting the spinal region to a height where an electrical measurement of the load magnitude by the sensored head of the spinal instrument is within a predetermined load range.
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Accused Products
Abstract
A spine alignment system is provided to assess load forces on the vertebra in conjunction with overall spinal alignment. The system includes a spine instrument having an electronic assembly and a sensorized head. The sensorized head can be inserted between vertebra and report vertebral conditions such as force, pressure, orientation and edge loading. A GUI is therewith provided to show where the spine instrument is positioned relative to vertebral bodies as the instrument is placed in the inter-vetebral space. The system can distract vertebrae to a first height and measure the load applied by the spine region. The GUI can indicate that the load is outside a predetermined range. The spine region can be distracted to a second height where the load is measured within the predetermined load range.
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Citations
18 Claims
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1. A method of distracting a spinal region comprising the steps of:
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inserting a sensored head of a spinal instrument into a spinal region; electronically measuring at least one of the orientation, rotation, angle, or position of the sensor head with respect to a reference position not on the spinal instrument; positioning the sensored head until the position of a load magnitude on the sensored head as electronically measured by the sensored head is within a predetermined positional range; and distracting the spinal region to a height where an electrical measurement of the load magnitude by the sensored head of the spinal instrument is within a predetermined load range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of distracting a spinal region comprising the steps of:
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inserting a sensored head of a spinal instrument into a spinal region; locally and electronically measuring a load applied by the spinal region on the sensored head while the spinal region is distracted by the sensored head to a first height, and if the measured load is outside a predetermined load range indicating that the measured load is outside the predetermined load range; measuring a position of the measured load on the sensored head; and adjusting the spinal instrument to distract the spinal region to a second height where an electronic load measurement at the second height falls within the predetermined load range. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method of tracking alignment and orientation of a spinal region comprising the steps of:
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placing a receiver in proximity to a wand where the receiver is in a fixed position and in a line of sight of the wands, where the receiver includes at least two sensors that are configured to measure and transit ultrasonic signals, where the wand includes at least two sensors that are configured to measure and transmit ultrasonic signals; moving the wand to an anatomic feature on a spine and registering the anatomic feature with respect to the receiver; retrieving a 3D spine model of the spine having orientation and dimensions corresponding to the registered anatomic feature; and identifying the location of the registered anatomic feature on the 3D spine model. - View Dependent Claims (16, 17, 18)
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Specification