Please accept some friendly advice. Unfortunately, I have some experience with this.
Make sure to tell your surgeon, your anesthetist, and anyone else that makes decisions on your surgery team that you are NOT one of Jehovah's Witnesses and that you DO accept blood components. Tell them that your husband is one of Jehovah's Witnesses and that he could possibly be pressured by his JW associates to speak against the use of blood products while you are unconscious and try to override your wishes. Tell them that while you are unconscious, no one can override your wish to have blood products if deemed medical useful.