Abstract
Immunoscintigraphy was performed using the Fab' fragment of 99Tcm-labelled T2G1s anti-fibrin monoclonal antibody in a rabbit experimental model of venous thrombosis of known and increasing age (1, 3 and 7 days). Scans were positive in 3/7 cases for 1-day thrombosis (fibrin-poor network) and in 7/7 cases for 3-day thrombosis (fibrin-rich network). In rabbits with 7-day thrombosis, the scan was positive (2/4 cases) only when connective tissue was not present in the clot. Scintigraphic results were concordant with those of biodistribution studies showing the mean percentage of injected dose per gram 99Tcm-T2G1s present in the thrombosed vein wall (0.043, 0.082 and 0.07 for thrombi at 1, 3 and 7 days, respectively). Mean thrombosed vein wall-to-blood ratios were 1.027, 2.291 and 1.301, respectively. Immunoscintigraphy with T2G1s anti-fibrin monoclonal antibody thus enabled hematological status to be evaluated.
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