How common are blood clots with tibia lengthening?

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I think thrombosis is probably my biggest fear regarding the surgery, as I understand fat embolism is very rare.

It’s difficult to assess the likelihood of this actually happening, and most concerning is that there’s apparently a risk even months down the line.

I’m also aware that any surgery to the lower extremity also carries this sort of risk. Is there anything inherently dangerous about limb lengthening in particular so far as thrombosis risk vs other surgeries like knee replacement?

How big of a risk would there be dying from a blood clot for someone fit, healthy, in their 20s who doesn’t smoke and is getting LON on tibias?

I suppose it’s the period after surgery that stresses me out the most — that I could get a blood clot while I’m removing, no one would know and then bam, dead. 

Thanks!