Hi, I would like to make a recommendation. I am a nurse, and my mother was diagnosed with leukemia almost a year and a half ago now, and has undergone many bmb's. I have been there for most of them. I have always INSISTED on conscious sedation for her. She had one bmb done that the doctor did not want to do the sedation (a nurse has to put in an iv to administer it, and it requires a half hour of monitoring after the procedure, and because it was close to the end of the day, he did not want to keep the office staff late), so he told her to take two darvocets an hour before the appointment. She said the pain was terrible with that one, and would never do that again! For her, ativan and demerol work best, but every physician has different offerings. They may just give morphine or a combination of drugs. If you have the sedation, you will need someone to drive home for you. Expect the area of the poke to be sore for about a day, but not unbearably so. The reason you will need the sedation, is that when the actual biopsy and aspiration is occuring, when they pull back on the syringe to remove the sample, it causes a shooting sensation down the leg.
Hope that gives you a better idea, and good luck with everything!
