Deep-vein thrombosis after major non-cardiovascular thoracic surgery.

The incidence of deep-vein thrombosis (DVT) verified by fibrinogen test was studied in 44 high-risk patients after major non-cardiovascular thoracic surgery. In eight patients (18%) a total of ten DVT appeared within the first postoperative week. Four thrombi were located at or above knee level. More extensive surgery was associated with higher DVT incidence than lesser operations (32% v. 8%). In patients belonging to blood groups B and AB, DVT was more common than in other blood groups. Five of the six unilateral DVT were detected on the same side as the thoracotomy. The findings suggest that DVT incidence after this kind of surgery may be of the same order as after major general surgery, indicating a need for thromboprophylactic measures.