[Radionuclide evaluation of the degree of tissue ischemia in acute thrombosis of the main arteries of the lower extremities].

The authors ascertained the value of three-phase scintigraphy using 99mTc pyrophotech (intravenously injected in a dose of 370-500 MBq, radiation exposure 2.1-2.85 mZv) in the diagnosis of disorders of great blood flow and soft tissue blood supply in patients with acute thrombosis of the main arteries, including acute thrombosis caused by injury. Examination of 68 patients with critical ischemia of the lower limbs identified 5 types of 99mTc pyrophotech incorporation into ischemic tissues in main artery thrombosis, embolism and atherosclerotic occlusions. The radionuclide technique in combination with ultrasonography and X-ray contrast angiography has shown it possible to choose adequate treatment policy and to specify the level of amputation and the scope of necrectomy when local muscle necrosis is developed.