Measurement system for a selection of at least one prosthetic component of a shoulder joint during surgery
Inventors
ROCHE, Chris • Greene, Alexander • Trousdale, Jonathan • DeCerce, Joseph
Assignees
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Publication Number
US-11992424-B2
Publication Date
2024-05-28
Expiration Date
Abstract
A selection system comprises a ring, a plurality of shims, a measurement device, and at least one glenoid component. The ring is configured to couple to a humerus. A shim of the plurality of shims is configured to couple to the ring. The measurement device is configured to couple to the shim. Each shim of the plurality of shims has a different height when coupled to the ring. The selection system generates measurement data to support the selection of at least one prosthetic component for a shoulder joint in a surgical environment. The shoulder joint geometry can be adjusted by changing shims, changing glenoid component or both. The selection system is removed after the selection of the final prosthetic components for the shoulder joint. The final prosthetic components are installed in the shoulder joint. The measurement device is placed in the shoulder joint and measurement data is generated to verify performance.
Core Innovation
A disposable kinetic shoulder joint measurement and selection system provides intraoperative quantitative assessment during shoulder joint surgery. A first bone is resected to produce a resected surface, and a coupling device is coupled directly to the resected surface using at least one nail or at least one screw. A prosthetic device is coupled to a second bone of the shoulder joint, where the second bone is opposite the first bone.
A measurement device is coupled directly to the coupling device and includes an external surface configured to articulate with the prosthetic device. The measurement device measures at least one force while the shoulder joint is moved through a range of motion, including load magnitude and position/contact point, and supports force decomposition and load/position calculation. The measurement device is described as being placed within a sealed measurement device enclosure with sensors arranged to support these measurements.
The system selects at least one of the prosthetic device coupled to the second bone or a further prosthetic device configured to be coupled to the first bone based at least on the measured force. It supports generation and display of measurement data via a GUI, including motion bars, impingement highlighting, ROM overlays, and load tracks, to inform decisions to adjust geometry such as shim height and/or glenoid component changes before installing final prosthetic components.
Claims Coverage
The provided material includes independent claim coverage for a method of shoulder joint surgery with coupling, measurement, and selection steps. The core inventive coverage centers on 4 inventive features.
Shoulder resection coupled to a coupling device using nail or screw
performing a resection of a first bone of a shoulder joint to produce a resected surface; coupling a coupling device directly to the resected surface using at least one of at least one nail or at least one screw
Measurement device with external articulating surface coupled to the coupling device
coupling a measurement device directly to the coupling device, wherein the measurement device includes an external surface configured to articulate with the prosthetic device
Force measurement during movement through range of motion
moving the shoulder joint through a range of motion, wherein the measurement device measures at least one force within the shoulder joint while the shoulder joint is moved through the range of motion
Selecting prosthetic device based on measured in-joint force
selecting at least one of the prosthetic device coupled to the second bone or a further prosthetic device configured to be coupled to the first bone based at least on the measured at least one force
The independent-claim coverage focuses on coupling a measurement device to a coupling device and articulated prosthetic device, measuring at least one force during shoulder range of motion, and selecting between prosthetic devices based on the measured force.
Stated Advantages
The glenoid sphere directs loading primarily onto the sensor regions so that off-target loading onto non-coupling regions is reduced.
Documented Applications
Intraoperative quantitative assessment during shoulder joint surgery by measuring at least one force while moving the shoulder through a range of motion and selecting prosthetic components based at least on the measured force.
Selecting at least one of a prosthetic device coupled to the second bone or a further prosthetic device configured to be coupled to the first bone based at least on the measured at least one force during shoulder range of motion.
System context for selecting rTSA or TSA components based on quantitative load data and thresholds using shoulder range of motion measurements.
Verification workflow in which a temporary ring and the measurement device are coupled and then removed to record data with a liner.
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