[Bilateral determination of 131-I-hippuran clearance in nephroptoses within the scope of sequential camera scintigraphy].

In 65 patients with uni- or bilateral nephroptosis the 131I-hippurate-clearance of each kidney was determined in combination with sequential gammacamera scintigraphy. The clearance values were normal in 65% without changing due to patient position. In 35% of the ptotic kidneys clearance values were lower than normal as well as in 17,5% of the nonptotic contralateral kidneys. 23% of the ptotic kidney showed diminished clearance values in the upright position, whereas a significant increase was found in prone position. Such short-time changes of the 131I-hippurate-clearance indicate diminished perfusion of the kidney when it is moving downward.