Cat urinated on mattress?

Today, my cat urinated when she was jumping onto the bed. This wasn't on purpose as it some came out on the floor. She's a younger cat (only 7) and will be going to the vet on Monday to check for a UTI.

My question is - how do I get it out of my mattress? It's a brand new $1200 beautyrest pillowtop. I haven't had a new mattress in fifteen years and we just bought this one to treat ourselves two months ago (I'm not mad at the cat, but I'm furious with myself for not thinking ahead - I have pets that sleep on the bed, I should have gotten a plastic cover and I wouldn't be in this situation right now). I used Nature's Miracle and it didn't even put a dent in it. Does anyone have any tried and true ways to get cat urine smell out of a mattress?

Thanks so much!