Dynamic Ligament Balancing System
First Claim
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1. A system for measuring tension, pressure and distance of knee tissue, the system comprising:
- a prosthetic inlay device comprising;
at least two platform structures, wherein each of the platforms are supported on a scissor arm structure and a coil spring;
a force sensing sensor configured beneath each coil spring; and
a connector cable coupled to the force sensing sensors.
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Abstract
A method and system for measuring tension, pressure, and distance of knee tissue, the system comprising a prosthetic inlay device comprising at least two platform structures, wherein each of the platforms are supported on a scissor arm structure and a coil spring, a force sensing sensor configured beneath each coil spring, and a connector cable coupled to the force sensing sensors.
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Citations
8 Claims
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1. A system for measuring tension, pressure and distance of knee tissue, the system comprising:
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a prosthetic inlay device comprising; at least two platform structures, wherein each of the platforms are supported on a scissor arm structure and a coil spring; a force sensing sensor configured beneath each coil spring; and a connector cable coupled to the force sensing sensors. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for measuring tension, pressure, and distance of knee tissue, the method comprising:
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receiving a first set of signals from a ligament balancing device including force sensing sensors that measure force applied to at least two platform structures, the first set of signals representative of force applied to each of the at least two platform structures by a femur at one or more knee flexion angles prior to a prosthetic operation; identifying a first set of medial and lateral forces at the one or more knee flexion angles from the first set of signals; receiving a second set of signals from the ligament balancing device, the second set of signals representative of force applied to each of the at least two platform structures by the femur at the one or more knee flexion angles subsequent to the prosthetic operation; identifying a second set of medial and lateral forces at the one or more knee flexion angles from the second set of signals; displaying the first set of medial and lateral forces and the second set of medial and lateral forces on a display device; determining an amount of difference between medial and lateral forces at each of the one or more knee flexion angles; and displaying an indication for the one or more knee flexion angles based on the determined amount of difference between the medial and lateral forces in the second set of medial and lateral forces.
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8. Non-transitory computer readable media comprising program code that when executed by a programmable processor causes execution of a method for measuring tension, pressure, and distance of knee tissue, the computer readable media comprising:
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computer program code for receiving a first set of signals from a ligament balancing device including force sensing sensors that measure force applied to at least two platform structures, the first set of signals representative of force applied to each of the at least two platform structures by a femur at one or more knee flexion angles prior to a prosthetic operation; computer program code for identifying a first set of medial and lateral forces at the one or more knee flexion angles from the first set of signals; computer program code for receiving a second set of signals from the ligament balancing device, the second set of signals representative of force applied to each of the at least two platform structures by the femur at the one or more knee flexion angles subsequent to the prosthetic operation; computer program code for identifying a second set of medial and lateral forces at the one or more knee flexion angles from the second set of signals; computer program code for displaying the first set of medial and lateral forces and the second set of medial and lateral forces on a display device; computer program code for determining an amount of difference between medial and lateral forces at each of the one or more knee flexion angles; and computer program code for displaying an indication for the one or more knee flexion angles based on the determined amount of difference between the medial and lateral forces in the second set of medial and lateral forces.
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Specification