It was reported that after planning the knee for a navio procedure, they progressed to the cut screen and navio prompted them to check the checkpoints to make sure nothing moved and they could progress to bone preparation.
The femur checkpoint registered and was in the same place.
When they checked the tibia it showed an 8mm movement error.
They were using checkpoints and the surgeon was certain that the tracker array had not moved.
They redefined the point and moved forward.
They burred the distal femur and the surgeon thought that the placement of the femoral component looked off center, so he moved it over using visionair.
When they progressed to the tibia cut screen, they switched to refine mode and had him use the bur to make sure they were in the right place.
He moved the bur to the furthest medial side of the tibia and it showed he was way off the bone.
At that point he decided to use visionair to cut the tibia and finish the case with a delay of fewer than 30 minutes.
When they exited the case, they got a warning screen that showed "navio has detected problems with the with the tracking system".
|