Dovie... You may already know this, but once you've got a surgery date, make sure that you don't take ANY ASPIRIN FOR 2 WEEKS prior to surgery! I didn't know that at all -- and had, in fact, taken one about a week prior -- but read this valuable information in the hospital that they gave me as a POST-OP. (Big help then, eh? And they didn't even ask me if I'd taken any aspirin recently.) Not sure why that is, but it might be worth checking into. Also, from your family history, it sounds as though the filter is a good way to go. My doctor really kept on top of the blood clot possibility, and had my legs in these compressor thingies (to use the medical term ;-) for about 24 hours after surgery, and then I got blood thinner shots 3x/day for the remaining 4 days of my stay. Good to know that those options are out there to decrease the odds of blood clots. MUCH luck to you!