Voet D, Afschrift M
Department of Echography, University Hospital, Gent, Belgium.
Br J Radiol. 1991 Nov;64(767):1010-4. doi: 10.1259/0007-1285-64-767-1010.
The clinical features and evolution of floating thrombi (FT) diagnosed by duplex ultrasound were examined. In 76 consecutively diagnosed above-knee deep venous thromboses the prevalence of FT was 18%. Of 44 FT diagnosed in 39 patients, 18 (39%) were located in the common femoral, 12 (26%) in the popliteal and seven (15%) in the external iliac veins. Serial duplex examinations revealed that 31% of FT in the iliofemoral segment disappeared 33% remained unchanged and 36% adhered to the vein wall within 2 weeks following diagnosis. After 3 months, 87% of the floating segments had disappeared, irrespective of the localization or therapeutic regimen. Thirteen patients experienced pulmonary embolism before (12/13) or following (4/13) diagnosis of floating thrombosis; three of four superficial femoral vein FT embolized. Fifteen per cent of the patients with FT died during the study period and 28% of the thrombi were associated with a malignant neoplasm; the incidence of malignancy was 60% in superficial and 39% in common femoral vein FT.
对经双功超声诊断的漂浮血栓（FT）的临床特征及演变情况进行了检查。在76例连续诊断的膝上深静脉血栓形成中，FT的发生率为18%。在39例患者中诊断出的44个FT中，18个（39%）位于股总静脉，12个（26%）位于腘静脉，7个（15%）位于髂外静脉。连续的双功超声检查显示，在诊断后的2周内，髂股段FT中31%消失，33%保持不变，36%附着于静脉壁。3个月后，87%的漂浮段消失，与血栓的部位或治疗方案无关。13例患者在诊断漂浮血栓之前（12/13）或之后（4/13）发生了肺栓塞；4个股浅静脉FT中有3个发生了栓塞。在研究期间，15%的FT患者死亡，28%的血栓与恶性肿瘤相关；浅表FT中恶性肿瘤的发生率为60%，股总静脉FT中为39%。
