*OUCH* My son had almost the same kind of injury awhile back. Him and a guy were moving a lot of steel the guy helping my son let go of his end. It landed on my sons finger. It cut the tip of his finger off. It was horrible. They thought they might have to amputate his finger but they didnt thank goodness. He was in so much pain. Like your husband, any bump to his finger about sent him into orbit. Your hubby will be in my thoughts.