This is a complete nightmare and I do hope your son recovers both quickly and completely, especially as his living depends particularly on the use of his arms.
Will hospitals never learn? This story, sadly all too familiar, should be a wake-up call and at least you could feel it was not all for nothing if the hospital carried out a thorough investigation and made changes to ensure nothing like it ever happens again. But of course they won't.
The early bird may get the worm, but the second mouse gets the cheese.
Bookmarks