It was reported that, during a navio tka procedure, when using the visualization disk they noticed the femur cut block seemed too anterior that they would not be cutting any bone.
They thought they had sized the femur too large (size 7) so they went back and planned for a size 6.
This still seemed anterior.
They then checked checkpoints and the femur array was off by 5.
4 mm.
They redefined the femur checkpoint and cut the tibia since that array hadn't moved.
Then manually placed the 5-in-1 cut block for the femur.
The surgeon insists that the femur array did not actually move and said it was locked on very tight and he could not physically move it (from what was witnessed, the surgeon pulled on the entire femur array multiple times to move the patients leg.
While the array was secured tightly on the bone pins, he was cautioned that the pins may have become loose/moved in the femur).
So, in summary, it was used navio for tibia and distal femur resection, then manual instrumentation to set femur cut block and check gaps.
There was a delay of fewer than 30 minutes.
The surgeon was pleased with the results; gaps were perfectly balanced.
No other complications were reported.
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