Dvt in calf after ankle arthroscopy. was on xarelto after surg and compression device used during surgery. why did i still clot? need to be concerned?

Yes: Please see a hematologist to rule out clotting factor disorders called coagulopathies or thrombophilias. They are actually quite common. I myself have three of them. Identifying them can literally mean the difference between life and death. Best wishes for a happy and healthy new year.

Yes: Significant DVT after an ankle arthroscopy is unusual but it happens. Trauma, immobilization and hematological considers are causes of clotting (virchow's triad). See a hematologist to make sure you do do have an underlying condition that makes you prone to clotting.

DVT: I would have a detailed work up with a hematologist to evaluate for possible hereditary factor deficiencies that may have contributed to your dvt. Smoking, immobilization, birth control pills are risk factors for blood clots; there are multitude of factor deficiencies that affect the intrinsic and extrinsic pathways of clotting that need to be investigated.