So you mean external method tends to have lower risk of embolism compared to internat method,right? But unfortunately there is still possibility, I can't imagine the situation in which I can die due to embolism((
There's also a possibility that you'll die from the anesthesia or infection, but again, risk is very low. Another point about the car accident analogy is that for the most part, the benefits outweigh the risks by a large margin, even if driving is the most dangerous thing we do every day. Another example is prescription medicines with side effects, we take them for the greater good.
As long as you steer clear of taxing procedures like
simultaneous quadrilaterals, you'll be fine when it comes to fat embolism syndrome (FES). Just remember that FES is associated with naturally broken bones due to accidents as well; while a possibility, it's uncommon. CLL being an elective procedure means that there's increased incentive to steer away from risk (i.e. don't create a problem when there wasn't one).
It's good to know and understand the dangers, but try not to become immobilized by fear. If you're ever in doubt, talk about your concerns with your doctor.