i am 49 yrs old. had back surgery in 2010. the hospital used lovinox. i do have history of blood clots. in previous cases, heperin and coumidin have been used. this is a first for lovinox. had problems with abdominal bleeding/brusing right from the start. they did not send me home with coumidin therapy and ended again back inhospital with dvt clots. back on lovinox and coumidin now. at home with continued lovinox/coumidin therapy still having issues with abdominol brusing and not even giving injections in that side many times because of it. staing on the right most of the time. even when done with injections brusing stayed for a very long time - almost a month. had mentioned this to every doctor i had and even the health care nurse that came out during the first few weeks. all i get and this even from the last doctor visit 2 weeks ago, is that it did not matter, next time they were going to make sure i ws on lovinox longer then and no they were not going to use heperin. also when i had the niva scan to check for clots after 6 months in early jan. 2011 this month. there was found fistula abnormal as well as not being clear of clots yet. i do have the appointment with vascular surgeon coming up very soon. but cannot help but feel that the lovenox contributed to the fistulas in some way. as this has not happened before on the heperin/coumidin therepy treatments.