I can understand why your PCP feels there is a clear cause for this DVT. Prolonged sitting causes the blood to pool in the lower legs and leads to the subsequent development of a DVT. Lovenox and warfarin are used in conjuction but only until warfarin levels are therapeutic which are monitored by labwork. There are risk factors that predispose people to DVT's such as heart and vascular disorders, smoking, obesity, sitting for extended periods, injury, surgery, malignancy, etc. An evaluation by both a cardiovascular specialist and hematologist is recommended. I hope this has been somewhat helpful.
Theresa Jones, RN