A method for the treatment of thromboembolism comprising administering a thrombolytic agent directly to the thromboembolism in the presence of ultrasound. The total dose of thrombolytic agent administered is between 1 and 12mg and the time over which the total dose is delivered is less than 15 hours.一種用於治療血栓性栓塞之方法,其包含在超音波存在下直接向該血栓性栓塞投與血栓溶解劑。所投與血栓溶解劑之總劑量介於1與12 mg之間,且遞送該總劑量所歷經之時間少於15小時。