I reckon theoretically either are still dangerous enough to lead to embolism depending on the amount of gas entrapment. So perhaps I should revise the statement so it doesn't imply there isn't much risk when there have most likely been documented case reports.

It's also used in intra-aortic balloon pumps because it's inert enough to not cause serious problems if a balloon were to rupture. Though in 100 years we will probably have much better technology and not require them for anyone anymore. LVAD technologies are pretty amazing.