Computerized tomography and magnetic resonance imaging after ESWL. Comparison at over 4,000 shock waves

Twenty patients who received more than 3,000 shock waves at 20 kV during single treatment for renal calculi with the Tripter X1, were studied retrospectively after 48 hours with CT scan and magnetic resonance imaging (MRI). In 15 cases (85%) both diagnostic procedures were negative. In 2 cases both revealed a subcapsular haematoma and in another case perirenal urinary extravasation. We conclude that no substantial differences have been noted in postoperative complications in patients treated with 4,000 shock waves compared with those who received a smaller number of waves.