Many thanks for the kind thoughts and well wishes folks.
I'm a hands-on type; if I see a broken piece of steel I can weld it back together.
But with this sort of issue I'm completely out of my depth and feel entirely helpless and useless.
It's extremely worrying.
You just don't know what to do.
And there's really nothing you can do.
But thanks to the surgeons and medical science it has turned out alright in the end.

The feeling of relief is absolute.