Hi and welcome!
I realize that sometimes those who don't speak English as their primarly language find that abbreviations can get lost in translation. Here are a couple of links that I hope can help you out.
If you mean general online abbreviations such as LOL, YMMV, AFAIK, etc.: Appendix:English internet slang - Wiktionary
If you want nursing-related abbreviations: http://allnurses.com/general-nursing...ons-14070.html
Note: some abbreviations can vary between specialities as well as between individual facilities.
If you have a specific abbreviation that you want a translation for, tell us what it is and one of us will be happy to provide the info.