Moralidis Efstratios, Arsos Georgios, Kambaroudis Apostolos, Karakatsanis Konstantinos
Department of Nuclear Medicine, Aristotelian University of Thessaloniki, Hippokration Hospital, Thessaloniki, Greece. emoral@@hol.gr
Clin Nucl Med. 2006 Oct;31(10):598-601. doi: 10.1097/01.rlu.0000238190.83995.6f.
In inferior vena cava obstruction, collateral pathways allow the retrograde flow of venous blood from the lower part of the body. Unanticipated findings of Tc-99m macroaggregated albumin (MAA) venography in 3 cases with deep vein thrombosis of the legs and infrarenal inferior vena cava obstruction are presented. Apart from extensive collateral networks in the legs and the abdomen, the visualization of the liver indicates a shunt of the systemic venous blood flow through the paraumbilical vein to the portal vein. The visualization of lumbar and thoracic vertebrae is attributed to venous flow through a dilated vertebral plexus, resulting in trapping of tracer in the neighboring bone marrow.
在下腔静脉阻塞时，侧支循环途径可使静脉血从身体下部逆向流动。本文报告了3例下肢深静脉血栓形成并肾下腔静脉阻塞患者的锝-99m 大颗粒白蛋白（MAA）静脉造影意外发现。除了腿部和腹部广泛的侧支循环网络外，肝脏显影表明体循环静脉血流通过脐旁静脉分流至门静脉。腰椎和胸椎显影归因于通过扩张的椎静脉丛的血流，导致示踪剂在邻近骨髓中滞留。
