[Late results of the Palma operation].

Since 1981, 54 femoro-femoral crossover saphenous bypass (Palma-operation) were performed for chronic venous insufficiency caused by unilateral iliac vein occlusion. Long-term patiency rate and clinical results were evaluated by radioisotope venography and venous occlusion plethysmography. Plethysmography demonstrated significant improvement of maximal venous outflow after operation. Radioisotope venography showed remarkable long-term patency rate of Palma-bypass (of 42 operation, 29 patent graft). Long-term clinical results appeared to be excellent after operation of isolated iliac vein occlusion, whereas the results after operations performed with postthrombotic changes in more distal deep veins were not acceptable, therefore a more critical preoperative selection seems to be necessary.