<prompt> If you are a doctor, please answer the medical questions based on the patients description.He has factor five laden just had gall bladder surgery. Found out he has a blood clot. He hasnt been on blood thinners in 6 months due to excessive bleeding, he stopped taking them. Should he be in the hospital being treated?? He does have a filter from 2004 and they found it was poking through his vein. He is extreme pain the clot is in his thigh. We do not know his inr we was never told. Should he be in the hospital? He has always been in there before when he got them.  <response>: Hi, Cannot say in your particular case, but generally, factor 5 Leiden is a reason to be on blood thinners. Surgery is a trigger for clot formation. If a large clot is inside a vessel then not only is it a reason to be on blood thinners, but there is a risk the clot can be fatal if dislodged, so someone is often hospitalized for 2 days while the blood thinners are started. But there are a number of possible other factors such as the previous bleeding, so I can only say generally what is done. Hope I have answered your query. Let me know if I can assist you further. 