CPC A61B 5/4504 (2013.01) [A61B 5/0031 (2013.01); A61B 5/1071 (2013.01); A61B 6/12 (2013.01); A61B 6/505 (2013.01); A61B 17/72 (2013.01); A61B 17/80 (2013.01); G01L 1/24 (2013.01); G01L 1/25 (2013.01); G01L 19/086 (2013.01)] | 20 Claims |
1. A spinal orthopedic device comprising an implantable strain sensor comprising an indicator, the indicator including a first end and a second end, the first end being configured for direct or indirect fixation to the spinal orthopedic device, the second end comprising a first radiographically opaque material, the sensor further comprising a scale comprising a second radiographically opaque material, the scale being located in conjunction with the second end, wherein the strain sensor is a passive sensor such that a location of the second end with respect to the scale is discernible via X-ray imaging with no active interrogation of the first or second radiographically opaque materials.
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