Can I wear bracelets and a ring during my rhinoplasty surgery to cover up tattoos?

I'm 21 years old, and I have tattoos on my wrist and one on my finger that my parents don't know about. I usually cover them up with friendship bracelets that are made out of string (there is absolutely no metal in them). And I usually wear a ring on my finger to cover up the finger tattoo. I am getting rhinoplasty surgery next month, and I don't want my parents to see my tattoos at all, as they will be at the surgery with me. Is there anyway I can keep the friendship bracelets and the ring on?